// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @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 or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * 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.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @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`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

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

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

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface ICryptoVault {
    function depositNftToEscrowAndERC20ToBorrower(
        address nftContract,
        uint256 loanId,
        uint256[] calldata tokenIds,
        address currencyERC20,
        address lender,
        address borrower,
        uint256 loanAmount
        ) external;

    function withdrawNftFromEscrowAndERC20ToLender(
        address nftContract,
        uint256 loanId,
        uint256[] calldata tokenIds,
        address borrower,
        address lender,
        uint256 rePaymentAmount,
        uint256 computeAdminFee,
        address currencyERC20,
        address adminWallet
        ) external;
    
    function withdrawNftFromEscrow(
        address nftContract,
        uint256 loanId,
        uint256[] calldata tokenIds,
        address lender
    ) external;

    function AssetStoredOwner( 
        address tokenAddress, 
        uint256 tokenId
    ) external view returns (address);

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../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`.
     *
     * 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;

    /**
     * @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 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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * 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 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 address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool approved) external;

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

    /**
     * @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);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

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

interface ILoanManager {

    struct Loan {
        address nftContract;
        uint256[] tokenIds;
        address borrower;
        address lender;
        uint256 loanAmount;
        uint256 aprBasisPoints;
        uint256 loanDuration;
        address currencyERC20;
        uint256 loanInitialTime;
        uint256 lenderReceiptId;
        uint256 borrowerReceiptId;
        bool isPaid;
        bool isDefault;
        bool isApproved;
    }

    struct LoanData {
        address nftContract;
        uint256[] tokenIds;
        address borrower;
        address lender;
        uint256 loanAmount;
        uint256 aprBasisPoints;
        uint256 loanDuration;
        address currencyERC20;
    }
    function createLoan(
        LoanData calldata loanData,
        uint256 lenderReceiptId,
        uint256 borrowerReceiptId,
        uint256 _nonce
    ) external;

    function updateLoan(Loan memory loan, uint256 loanId) external returns(bool);

    function getLoan(
        address _contract,
        uint256[] calldata _tokenIds,
        address _borrower,
        uint256 _nonce
    ) external view returns (Loan memory loan, uint256 loanId);

    function updateIsPaid(uint256 loanId, bool state) external;

    function updateIsDefault(uint256 loanId, bool state) external;

    function updateIsApproved(uint256 loanId, bool state) external;
    
    function setLoanId(uint256 loanReceiptID, uint256 loanId) external;

    function getPayoffAmount(uint256 loanId) external view returns(uint256, uint256);
    
    function getLoanById(uint256 loanId) external view returns (Loan memory loan); 

    function getLoanId(uint256 loanReceiptID) external view returns(uint256 loanID);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface ReceiptInterface {
    function open() external view returns (bool);

    function burnReceipt(uint256 tokenId) external;

    function ownerOf(uint256) external view returns (address);

    function tokenExist(uint256) external view returns (bool);

    function generateReceipt(uint256 loanId, address holder) external returns (uint256);

    function getReceiptId(uint256 loanId) external view returns(uint256 holderReceiptId, address holderAddress);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reininitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._initialized = 1;
        if (isTopLevelCall) {
            $._initializing = true;
        }
        _;
        if (isTopLevelCall) {
            $._initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._initialized = version;
        $._initializing = true;
        _;
        $._initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _getInitializableStorage()._initializing;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        assembly {
            $.slot := INITIALIZABLE_STORAGE
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IwhiteListCollection {
    function blackListErc20Token(address[] memory _Erc20Addresses) external;
    
    function whiteListErc20Token(address[] memory _Erc20Addresses) external;
    
    function whiteListCollection(address[] memory _collectionAddresses) external;

    function blackListCollection(address[] memory _collectionAddresses) external;

    function isWhiteListErc20Token(address _Erc20Address) external view returns(bool);
 
    function isWhiteListCollection(address _collectionAddress) external view returns(bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./interfaces/IwhiteListCollection.sol";
import "./interfaces/ICryptoVault.sol";
import "./interfaces/ILoanManager.sol";
import "./library/SignatureUtils.sol";
import "./interfaces/IReceipts.sol";

contract NettyWorthProxy is ReentrancyGuard, Initializable,Ownable {
    using SafeERC20 for IERC20;
    using Address for address;

    address public vault;
    address public loanManager;
    address public lenderReceiptContract; 
    address public borrowerReceiptContract;
    address public whiteListContract;
    uint256 public adminFeeInBasisPoints = 400; // initial admin fee 4%.
    uint256 private proposeAdminFeeInBasisPoints;

    uint256 public constant BPS = 10000; // 10000 in basis points = 100%.
    address public adminWallet;
    address private _updateAdminWallet;

    ICryptoVault _icryptoVault;
    ILoanManager _iloanManager;
    ReceiptInterface _ireceiptLender;
    ReceiptInterface _ireceiptBorrower;
    IwhiteListCollection _iwhiteListCollection;

    event LoanRepaid(
        uint256 indexed loanId,
        address indexed nftContract,
        uint256[] tokenIds,
        address borrower,
        address lender,
        uint256 repayment,
        address erc20Address,
        bool isPaid
    );

    event LoanForClosed(
        uint256 indexed loanId,
        address indexed nftContract,
        uint256[] tokenIds,
        address borrower,
        address lender,
        bool isDefault
    );

    event UpdatedAdminFee(uint256 oldAdminFee, uint256 newAdminFee);
    event UpdatedAdminWallet(address oldAdminWallet, address newAdminWallet);

    constructor() Ownable(msg.sender){}

    function proposeAdminWallet(address _adminWallet) public onlyOwner {
        require(_adminWallet != address(0), "Invalid Address");
        _updateAdminWallet = _adminWallet;
    } 
    function setAdminWallet() public onlyOwner {
        adminWallet = _updateAdminWallet;
        _updateAdminWallet =  address(0);
        emit UpdatedAdminWallet(msg.sender,adminWallet);
    }

    function proposeUpdateAdminFee(uint256 _newAdminFee) public onlyOwner {
        require(
            _newAdminFee <= 500, // 500 in BPS = 5%
            "By definition, basis points cannot exceed 500(5%)."
        );
        proposeAdminFeeInBasisPoints = _newAdminFee;
    }

    function updateAdminFee() public onlyOwner {
        uint256 oldAdminFee = adminFeeInBasisPoints;
        adminFeeInBasisPoints = proposeAdminFeeInBasisPoints;
        proposeAdminFeeInBasisPoints = 0;
        emit UpdatedAdminFee(oldAdminFee,adminFeeInBasisPoints);
    }

    function initialize(
        address _vault,
        address _loanManager,
        address _lenderReceiptContract,
        address _borrowerReceiptContract,
        address _iwhiteListContract,
        address _adminWallet
    ) external initializer {
        setVault(_vault);
        setLoanManager(_loanManager);
        setReceiptContractLender(_lenderReceiptContract); 
        setReceiptContractBorrower(_borrowerReceiptContract);
        setWhiteListContract(_iwhiteListContract);
        proposeAdminWallet(_adminWallet);
        setAdminWallet();
    }

    function setWhiteListContract(address _whiteList) public onlyOwner {
        require(_whiteList != address(0), "Invalid address");
        whiteListContract = _whiteList;
        _iwhiteListCollection = IwhiteListCollection(whiteListContract);
    }

    function setVault(address _vault) public onlyOwner {
        require(_vault != address(0), "Invalid address");
        vault = _vault;
        _icryptoVault = ICryptoVault(_vault);
    }

    function setLoanManager(address _loanManager) public onlyOwner {
        require(_loanManager != address(0), "Invalid address");
        loanManager = _loanManager;
        _iloanManager = ILoanManager(loanManager);
    }

    function setReceiptContractLender(address _lenderReceiptContract) public onlyOwner {
        require(_lenderReceiptContract != address(0), "Invalid address");
        lenderReceiptContract = _lenderReceiptContract;
        _ireceiptLender = ReceiptInterface(lenderReceiptContract);
    }

    function setReceiptContractBorrower(address _borrowerReceiptContract) public onlyOwner {
        require(_borrowerReceiptContract != address(0), "Invalid address");
        borrowerReceiptContract = _borrowerReceiptContract;
        _ireceiptBorrower = ReceiptInterface(borrowerReceiptContract);
    }

    function acceptLoanRequest(
        bytes calldata acceptRequestSignature,
        SignatureUtils.LoanRequest calldata loanRequest
    )
        external
        nonReentrant
        returns (uint256 receiptIdBorrower, uint256 receiptIdLender)
    {
        _sanityCheckAcceptOffer(
            loanRequest.nftContractAddress,
            loanRequest.erc20TokenAddress
            // loanRequest.loanDuration
            );
        require(
            SignatureUtils._validateRequestLoanSignature(
                acceptRequestSignature,
                loanRequest
            ),
            "Invalid borrower signature"
        );
        require(msg.sender != loanRequest.borrower, "Unauthorized sender");
        ILoanManager.LoanData memory loandata = ILoanManager.LoanData(
            loanRequest.nftContractAddress,
            loanRequest.tokenIds,
            loanRequest.borrower,
            msg.sender,
            loanRequest.loanAmount,
            loanRequest.aprBasisPoints,
            loanRequest.loanDuration + block.timestamp,
            loanRequest.erc20TokenAddress);
        (receiptIdBorrower, receiptIdLender) = _acceptOffer(
            loandata,
            loanRequest.nonce
        );

        return (receiptIdBorrower, receiptIdLender);
    }

    function acceptLoanOffer(
        bytes calldata acceptOfferSignature,
        SignatureUtils.LoanOffer calldata loanOffer
    )
        external
        nonReentrant
        returns (uint256 receiptIdBorrower, uint256 receiptIdLender)
    {
        require(msg.sender == loanOffer.borrower, "Unauthorized sender");
        _sanityCheckAcceptOffer(
            loanOffer.nftContractAddress,
            loanOffer.erc20TokenAddress
            // loanOffer.loanDuration
            );
        require(
            SignatureUtils._validateSignatureApprovalOffer(
                acceptOfferSignature,
                loanOffer
            ),
            "Invalid lender signature"
        );
        ILoanManager.LoanData memory loandata = ILoanManager.LoanData(
            loanOffer.nftContractAddress,
            loanOffer.tokenIds,
            loanOffer.borrower,
            loanOffer.lender,
            loanOffer.loanAmount,
            loanOffer.aprBasisPoints,
            loanOffer.loanDuration + block.timestamp,
            loanOffer.erc20TokenAddress);
        (receiptIdBorrower, receiptIdLender) = _acceptOffer(
            loandata,
            loanOffer.nonce
        );

        return (receiptIdBorrower, receiptIdLender);
    }

    function acceptLoanCollectionOffer(
        bytes calldata acceptOfferSignature,
        SignatureUtils.LoanCollectionOffer calldata loanCollectionOffer,
        uint256[] calldata tokenIds
    )
        external
        nonReentrant
        returns (uint256 receiptIdBorrower, uint256 receiptIdLender)
    {
        _sanityCheckAcceptOffer(
            loanCollectionOffer.collectionAddress,
            loanCollectionOffer.erc20TokenAddress
            // loanCollectionOffer.loanDuration
        );
        require(
            SignatureUtils._validateLoanCollectionOfferSignature(
                acceptOfferSignature,
                loanCollectionOffer
            ),
            "Invalid lender signature"
        );
        ILoanManager.LoanData memory loandata = ILoanManager.LoanData(loanCollectionOffer.collectionAddress,
            tokenIds,
            msg.sender,
            loanCollectionOffer.lender,
            loanCollectionOffer.loanAmount,
            loanCollectionOffer.aprBasisPoints,
            loanCollectionOffer.loanDuration + block.timestamp,
            loanCollectionOffer.erc20TokenAddress);
        (receiptIdBorrower, receiptIdLender) = _acceptOffer(
            loandata,
            loanCollectionOffer.nonce
        );

        return (receiptIdBorrower, receiptIdLender);
    }

    function _acceptOffer(
       ILoanManager.LoanData memory loandata,
        uint256 nonce
    ) internal returns (uint256 _receiptIdBorrower, uint256 _receiptIdLender) {
        (ILoanManager.Loan memory loan, uint256 _loanId) = _iloanManager.getLoan(
            loandata.nftContract,
            loandata.tokenIds,
            loandata.borrower,
            nonce
        );
        require(!loan.isPaid, "Loan offer is closed");
        require(!loan.isApproved, "Loan offer is already approved");
        _receiptIdBorrower = _ireceiptBorrower.generateReceipt(
            _loanId,
            loandata.borrower
        );
        _receiptIdLender = _ireceiptLender.generateReceipt(
            _loanId,
            loandata.lender
        );

        _iloanManager.setLoanId(_receiptIdLender,_loanId);
        _iloanManager.createLoan(
          loandata,
          _receiptIdLender,
          _receiptIdBorrower,
          nonce
        );
        _iloanManager.updateIsApproved(_loanId, true);
        _deposit(
            loandata.nftContract,
            _loanId,
            loandata.tokenIds,
            loandata.currencyERC20,
            loandata.lender,
            loandata.borrower,
            loandata.loanAmount
        );
    return (_receiptIdBorrower, _receiptIdLender);
    }

    function _deposit(
        address collectionAddress,
        uint256 loanid,
        uint256[] memory tokenIds,
        address erc20TokenAddress,
        address lender,
        address borrower,
        uint256 loanAmount
    ) internal {
        _icryptoVault.depositNftToEscrowAndERC20ToBorrower(
            collectionAddress,
            loanid,
            tokenIds,
            erc20TokenAddress,
            lender,
            borrower,
            loanAmount
        );
    }

    function payBackLoan(
        uint256 _loanId,
        address erc20Token
    ) external nonReentrant returns (bool) {
        ILoanManager.Loan memory loan = _iloanManager.getLoanById(_loanId);
        require(loan.currencyERC20 == erc20Token, "Currency Invalid");
        (uint256 rePaymentAmount, uint256 interestAmount) = _iloanManager.getPayoffAmount(_loanId);
        uint256 computeAdminFee = _computeAdminFee(interestAmount, adminFeeInBasisPoints);
        (address currentBorrower, address currentLender) = _sanityCheckPayBack(loan);
        _icryptoVault.withdrawNftFromEscrowAndERC20ToLender(
            loan.nftContract,
            _loanId,
            loan.tokenIds,
            currentBorrower,
            currentLender,
            rePaymentAmount,
            computeAdminFee,
            loan.currencyERC20,
            adminWallet
        );
        _ireceiptLender.burnReceipt(loan.lenderReceiptId);
        _ireceiptBorrower.burnReceipt(loan.borrowerReceiptId);

        _iloanManager.updateIsPaid(_loanId, true);

        emit LoanRepaid(
            _loanId,
            loan.nftContract,
            loan.tokenIds,
            currentBorrower,
            currentLender,
            rePaymentAmount,
            loan.currencyERC20,
            loan.isPaid
        );

    return true;
    }

    function forCloseLoan(uint256 _loanId) external nonReentrant returns (bool){
        ILoanManager.Loan memory loan = _iloanManager.getLoanById(_loanId);
        require(
            block.timestamp > loan.loanDuration,
            "User is not default yet::"
        );
        require(!loan.isPaid, "Loan Paid");
        require(!loan.isDefault, "Already Claimed");
        uint256 _borrowerReceiptId = loan.borrowerReceiptId;
        uint256 _lenderReceiptId = loan.lenderReceiptId;
        require(
            _ireceiptLender.tokenExist(_lenderReceiptId),
            "Receipt does not exist"
        );
        require(
            _ireceiptBorrower.tokenExist(_borrowerReceiptId),
            "Receipt does not exist"
        );
        address lender = _ireceiptLender.ownerOf(_lenderReceiptId);
        address borrower = _ireceiptBorrower.ownerOf(_borrowerReceiptId);
        require(
             lender == msg.sender,
            "You are not the lender"
        );

        _iloanManager.updateIsDefault(_loanId, true);
        _icryptoVault.withdrawNftFromEscrow(
            loan.nftContract,
            _loanId,
            loan.tokenIds,
            lender
        );

        _ireceiptLender.burnReceipt(_lenderReceiptId);
        _ireceiptBorrower.burnReceipt(_borrowerReceiptId);

        emit LoanForClosed(
            _loanId,
            loan.nftContract,
            loan.tokenIds,
            borrower,
            loan.lender,
            loan.isDefault
        );

    return true;
    }

    function getLenderReceiptId(uint256 loanId) external view returns(uint256 holderReceiptId, address holderAddress){
        require(loanId != 0, "200:ZERO_LoanID");
        (holderReceiptId, holderAddress) = _ireceiptLender.getReceiptId(loanId);
        return (holderReceiptId, holderAddress);
    }

    function getBorrowerReceiptId(uint256 loanId) external view returns(uint256 holderReceiptId, address holderAddress){
        require(loanId != 0, "200:ZERO_LoanID");
        (holderReceiptId, holderAddress) = _ireceiptBorrower.getReceiptId(loanId);
        return (holderReceiptId, holderAddress);
    } 

    //you can pass either lender receipt ID or Borrower receiptID both are same for each loan
    function getLoanId(uint256 _LoanReceiptId) external view returns(uint256 loanId){
        require(_ireceiptLender.tokenExist(_LoanReceiptId), "Receipt does not exist");
        loanId = _iloanManager.getLoanId(_LoanReceiptId);
        return loanId;
    }

    function _computeAdminFee(
        uint256 _interest,
        uint256 _adminFee
    ) internal pure returns (uint256) {
        return (_interest * (_adminFee)) / BPS;
    }

    function _sanityCheckPayBack(ILoanManager.Loan memory loan) internal view returns (address _borrower, address _lender){
          require(
            block.timestamp <= loan.loanDuration,
            "Loan repayment period has expired"
        );
        require(loan.isApproved, "Loan offer not approved");
        require(!loan.isDefault, "borrower is defaulter now");
        require(!loan.isPaid, "Loan is Paid");
        require(loan.lender != address(0), "Loan is not assigned to a lender");
        require(
            _ireceiptLender.tokenExist(loan.lenderReceiptId),
            "Receipt does not exist"
        );
        require(      
            _ireceiptBorrower.tokenExist(loan.borrowerReceiptId),
            "Receipt does not exist"
        );
        address lender = _ireceiptLender.ownerOf(loan.lenderReceiptId);
        address borrower = _ireceiptBorrower.ownerOf(loan.borrowerReceiptId);
        require(borrower == msg.sender, "caller is not borrower");        
    return (borrower,lender);
    }

    function _sanityCheckAcceptOffer(
        address nftContractAddress,
        address erc20Address
    ) internal view {
        require(vault != address(0), "Vault address not set");
        require(
            _iwhiteListCollection.isWhiteListCollection(nftContractAddress),
            "Collection is not White Listed"
        );
        require(
            _iwhiteListCollection.isWhiteListErc20Token(erc20Address),
            "Token is not White Listed"
        );
        require(loanManager != address(0), "Loan manager address not set");
        require(
            lenderReceiptContract != address(0),
            "Receipt Lender contract address not set"
        );
        require(
            borrowerReceiptContract != address(0),
            "Receipt Borrower contract address not set"
        );
    }
    
    function renounceOwnership() public view override onlyOwner {
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.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.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

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

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

    uint256 private _status;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";

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

    /**
     * @dev An operation with an ERC20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

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

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

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

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

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

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

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

        bytes memory returndata = address(token).functionCall(data);
        if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

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

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

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.24;
 
library SignatureUtils {    
    struct LoanRequest {
        uint256[] tokenIds;           
        address nftContractAddress;
        address erc20TokenAddress;
        address borrower;
        uint256 loanAmount;
        uint256 aprBasisPoints;
        uint256 loanDuration;
        uint256 nonce;
    }

    struct LoanOffer {
        uint256[] tokenIds;           
        address nftContractAddress;
        address erc20TokenAddress;
        address lender;
        address borrower;
        uint256 loanAmount;
        uint256 aprBasisPoints;
        uint256 loanDuration;
        uint256 nonce;
    }

    struct LoanCollectionOffer {
        address collectionAddress;
        address erc20TokenAddress;
        address lender;
        uint256 loanAmount;
        uint256 aprBasisPoints;
        uint256 loanDuration;
        uint256 nonce;
    }

    function _validateLoanCollectionOfferSignature(
        bytes calldata signature,
        LoanCollectionOffer calldata collectionOffer
    ) internal pure returns (bool) {
        // Pack the 
                bytes32 freshHash = keccak256(
            abi.encode(
                collectionOffer.collectionAddress,
                collectionOffer.erc20TokenAddress,
                collectionOffer.lender,
                collectionOffer.loanAmount,
                collectionOffer.aprBasisPoints,
                collectionOffer.loanDuration,
                collectionOffer.nonce
            )
        );
        // Get the packed payload hash
        bytes32 candidateHash = keccak256(
            abi.encodePacked("\x19Ethereum Signed Message:\n32", freshHash)
        );
        // Verify if the fresh hash is signed with the provided signature
        return _verifyHashSignature(collectionOffer.lender, candidateHash, signature);
    }
     
    function _validateRequestLoanSignature(
        bytes calldata signature,
        LoanRequest calldata loanRequest
    ) internal pure returns (bool) {
        // Pack the 
                bytes32 freshHash = keccak256(
            abi.encode(
                loanRequest.tokenIds,
                loanRequest.nftContractAddress,
                loanRequest.erc20TokenAddress,
                loanRequest.borrower,
                loanRequest.loanAmount,
                loanRequest.aprBasisPoints,
                loanRequest.loanDuration,
                loanRequest.nonce
            )
        );
        // Get the packed payload hash
        bytes32 candidateHash = keccak256(
            abi.encodePacked("\x19Ethereum Signed Message:\n32", freshHash)
        );
        // Verify if the fresh hash is signed with the provided signature
        return _verifyHashSignature(loanRequest.borrower, candidateHash, signature);
    }
 
    function _validateSignatureApprovalOffer(   
        bytes calldata signature,
        LoanOffer calldata loanOffer
    ) internal pure returns (bool) {
    // Verify if the fresh hash is signed with the provided signature
    return _verifyHashSignature(loanOffer.lender, keccak256(
            abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(
            abi.encode(
                loanOffer.tokenIds,
                loanOffer.nftContractAddress,
                loanOffer.erc20TokenAddress,
                loanOffer.lender,
                loanOffer.borrower,
                loanOffer.loanAmount,
                loanOffer.aprBasisPoints,
                loanOffer.loanDuration,
                loanOffer.nonce
            )
        ))
        ), signature);
    }

//********************************Verify Signatures********************************//
    function _verifyHashSignature(
        address secret,
        bytes32 hash,
        bytes memory signature
    ) internal pure returns (bool) {
        bytes32 r;
        bytes32 s;
        uint8 v;
 
        if (signature.length != 65) {
            return false;
        }
        assembly {
            r := mload(add(signature, 32))
            s := mload(add(signature, 64))
            v := byte(0, mload(add(signature, 96)))
        }
 
        if (v < 27) {
            v += 27;
        }
 
        address _signer = address(0);
        if (v == 27 || v == 28) {
            // solium-disable-next-line arg-overflow
            _signer = ecrecover(hash, v, r, s);
        }
        return secret == _signer;
    }
}

{
  "compilationTarget": {
    "src/contracts/NettyWorthProxy.sol": "NettyWorthProxy"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}