Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.19;

import "./IDirectLoanBase.sol";
import "./LoanData.sol";
import "../../../interfaces/IDirectLoanCoordinator.sol";
import "../../../utils/ContractKeys.sol";
import "../../../interfaces/INftfiHub.sol";
import "../../../interfaces/IPermittedPartners.sol";
import "../../../interfaces/IPermittedERC20s.sol";

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

/**
 * @title  LoanChecksAndCalculations
 * @author NFTfi
 * @notice Helper library for LoanBase
 */
library LoanChecksAndCalculations {
    uint16 private constant HUNDRED_PERCENT = 10000;

    /**
     * @dev Function that performs some validation checks before trying to repay a loan
     *
     * @param _loanId - The id of the loan being repaid
     */
    function payBackChecks(uint32 _loanId, INftfiHub _hub) external view {
        checkLoanIdValidity(_loanId, _hub);
        // Sanity check that payBackLoan() and liquidateOverdueLoan() have never been called on this loanId.
        // Depending on how the rest of the code turns out, this check may be unnecessary.
        require(!IDirectLoanBase(address(this)).loanRepaidOrLiquidated(_loanId), "Loan already repaid/liquidated");

        // Fetch loan details from storage, but store them in memory for the sake of saving gas.
        (, , , , uint32 loanDuration, , , , uint64 loanStartTime, , ) = IDirectLoanBase(address(this)).loanIdToLoan(
            _loanId
        );

        // When a loan exceeds the loan term, it is expired. At this stage the Lender can call Liquidate Loan to resolve
        // the loan.
        require(block.timestamp <= (uint256(loanStartTime) + uint256(loanDuration)), "Loan is expired");
    }

    function checkLoanIdValidity(uint32 _loanId, INftfiHub _hub) public view {
        require(
            IDirectLoanCoordinator(_hub.getContract(IDirectLoanBase(address(this)).LOAN_COORDINATOR())).isValidLoanId(
                _loanId,
                address(this)
            ),
            "invalid loanId"
        );
    }

    /**
     * @dev Function that the partner is permitted and returns its shared percent.
     *
     * @param _revenueSharePartner - Partner's address
     *
     * @return The revenue share percent for the partner.
     */
    function getRevenueSharePercent(address _revenueSharePartner, INftfiHub _hub) external view returns (uint16) {
        // return soon if no partner is set to avoid a public call
        if (_revenueSharePartner == address(0)) {
            return 0;
        }

        uint16 revenueSharePercent = IPermittedPartners(_hub.getContract(ContractKeys.PERMITTED_PARTNERS))
        .getPartnerPermit(_revenueSharePartner);

        return revenueSharePercent;
    }

    /**
     * @dev Performs some validation checks before trying to renegotiate a loan.
     * Needed to avoid stack too deep.
     *
     * @param _loan - The main Loan Terms struct.
     * @param _loanId - The unique identifier for the loan to be renegotiated
     * @param _newLoanDuration - The new amount of time (measured in seconds) that can elapse before the lender can
     * liquidate the loan and seize the underlying collateral NFT.
     * @param _newMaximumRepaymentAmount - The new maximum amount of money that the borrower would be required to
     * retrieve their collateral, measured in the smallest units of the ERC20 currency used for the loan. The
     * borrower will always have to pay this amount to retrieve their collateral, regardless of whether they repay
     * early.
     * @param _lenderNonce - The nonce referred to here is not the same as an Ethereum account's nonce. We are
     * referring instead to nonces that are used by both the lender and the borrower when they are first signing
     * off-chain NFTfi orders. These nonces can be any uint256 value that the user has not previously used to sign an
     * off-chain order. Each nonce can be used at most once per user within NFTfi, regardless of whether they are the
     * lender or the borrower in that situation. This serves two purposes:
     * - First, it prevents replay attacks where an attacker would submit a user's off-chain order more than once.
     * - Second, it allows a user to cancel an off-chain order by calling NFTfi.cancelLoanCommitmentBeforeLoanHasBegun()
     , which marks the nonce as used and prevents any future loan from using the user's off-chain order that contains
     * that nonce.
     * @return Borrower and Lender addresses
     */
    function renegotiationChecks(
        LoanData.LoanTerms memory _loan,
        uint32 _loanId,
        uint32 _newLoanDuration,
        uint256 _newMaximumRepaymentAmount,
        uint256 _lenderNonce,
        INftfiHub _hub
    ) external view returns (address, address) {
        checkLoanIdValidity(_loanId, _hub);
        IDirectLoanCoordinator loanCoordinator = IDirectLoanCoordinator(
            _hub.getContract(IDirectLoanBase(address(this)).LOAN_COORDINATOR())
        );
        uint256 smartNftId = loanCoordinator.getLoanData(_loanId).smartNftId;

        address borrower;

        if (_loan.borrower != address(0)) {
            borrower = _loan.borrower;
        } else {
            borrower = IERC721(loanCoordinator.obligationReceiptToken()).ownerOf(smartNftId);
        }

        require(msg.sender == borrower, "Only borrower can initiate");
        require(block.timestamp <= (uint256(_loan.loanStartTime) + _newLoanDuration), "New duration already expired");
        require(
            uint256(_newLoanDuration) <= IDirectLoanBase(address(this)).maximumLoanDuration(),
            "New duration exceeds maximum loan duration"
        );
        require(!IDirectLoanBase(address(this)).loanRepaidOrLiquidated(_loanId), "Loan already repaid/liquidated");
        require(
            _newMaximumRepaymentAmount >= _loan.loanPrincipalAmount,
            "Negative interest rate loans are not allowed."
        );

        // Fetch current owner of loan promissory note.
        address lender = IERC721(loanCoordinator.promissoryNoteToken()).ownerOf(smartNftId);

        require(
            !IDirectLoanBase(address(this)).getWhetherNonceHasBeenUsedForUser(lender, _lenderNonce),
            "Lender nonce invalid"
        );

        return (borrower, lender);
    }

    /**
     * @notice A convenience function computing the revenue share taken from the admin fee to transferr to the permitted
     * partner.
     *
     * @param _adminFee - The quantity of ERC20 currency (measured in smalled units of that ERC20 currency) that is due
     * as an admin fee.
     * @param _revenueShareInBasisPoints - The percent (measured in basis points) of the admin fee amount that will be
     * taken as a revenue share for a the partner, at the moment the loan is begun.
     *
     * @return The quantity of ERC20 currency (measured in smalled units of that ERC20 currency) that should be sent to
     * the `revenueSharePartner`.
     */
    function computeRevenueShare(uint256 _adminFee, uint256 _revenueShareInBasisPoints)
        external
        pure
        returns (uint256)
    {
        return (_adminFee * _revenueShareInBasisPoints) / HUNDRED_PERCENT;
    }

    /**
     * @notice A convenience function computing the adminFee taken from a specified quantity of interest.
     *
     * @param _interestDue - The amount of interest due, measured in the smallest quantity of the ERC20 currency being
     * used to pay the interest.
     * @param _adminFeeInBasisPoints - The percent (measured in basis points) of the interest earned that will be taken
     * as a fee by the contract admins when the loan is repaid. The fee is stored in the loan struct to prevent an
     * attack where the contract admins could adjust the fee right before a loan is repaid, and take all of the interest
     * earned.
     *
     * @return The quantity of ERC20 currency (measured in smalled units of that ERC20 currency) that is due as an admin
     * fee.
     */
    function computeAdminFee(uint256 _interestDue, uint256 _adminFeeInBasisPoints) external pure returns (uint256) {
        return (_interestDue * _adminFeeInBasisPoints) / HUNDRED_PERCENT;
    }

    /**
     * @notice A convenience function computing the referral fee taken from the loan principal amount to transferr to
     * the referrer.
     *
     * @param _loanPrincipalAmount - The original sum of money transferred from lender to borrower at the beginning of
     * the loan, measured in loanERC20Denomination's smallest units.
     * @param _referralFeeInBasisPoints - The percent (measured in basis points) of the loan principal amount that will
     * be taken as a fee to pay to the referrer, 0 if the lender is not paying referral fee.
     * @param _referrer - The address of the referrer who found the lender matching the listing, Zero address to signal
     * that there is no referrer.
     *
     * @return The quantity of ERC20 currency (measured in smalled units of that ERC20 currency) that should be sent to
     * the referrer.
     */
    function computeReferralFee(
        uint256 _loanPrincipalAmount,
        uint256 _referralFeeInBasisPoints,
        address _referrer
    ) external pure returns (uint256) {
        if (_referralFeeInBasisPoints == 0 || _referrer == address(0)) {
            return 0;
        }
        return (_loanPrincipalAmount * _referralFeeInBasisPoints) / HUNDRED_PERCENT;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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`.
     *
     * 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 caller.
     *
     * 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
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.19;

/**
 * @title IDirectLoanCoordinator
 * @author NFTfi
 * @dev DirectLoanCoordinator interface.
 */
interface IDirectLoanCoordinator {
    enum StatusType {
        NOT_EXISTS,
        NEW,
        REPAID,
        LIQUIDATED
    }

    /**
     * @notice This struct contains data related to a loan
     *
     * @param smartNftId - The id of both the promissory note and obligation receipt.
     * @param status - The status in which the loan currently is.
     * @param loanContract - Address of the LoanType contract that created the loan.
     */
    struct Loan {
        address loanContract;
        uint64 smartNftId;
        StatusType status;
    }

    function registerLoan(address _lender, bytes32 _loanType) external returns (uint32);

    function resetSmartNfts(uint32 _loanId, address _borrower) external;

    function mintObligationReceipt(uint32 _loanId, address _borrower) external;

    function resolveLoan(uint32 _loanId, bool liquidated) external;

    function promissoryNoteToken() external view returns (address);

    function obligationReceiptToken() external view returns (address);

    function getLoanData(uint32 _loanId) external view returns (Loan memory);

    function isValidLoanId(uint32 _loanId, address _loanContract) external view returns (bool);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.19;

/**
 * @title INftfiHub
 * @author NFTfi
 * @dev NftfiHub interface
 */
interface INftfiHub {
    function setContract(string calldata _contractKey, address _contractAddress) external;

    function getContract(bytes32 _contractKey) external view returns (address);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.19;

interface IPermittedERC20s {
    function getERC20Permit(address _erc20) external view returns (bool);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.19;

interface IPermittedPartners {
    function getPartnerPermit(address _partner) external view returns (uint16);
}

// SPDX-License-Identifier: BUSL-1.1

import "./LoanData.sol";

pragma solidity 0.8.19;

interface IDirectLoanBase {
    function maximumLoanDuration() external view returns (uint256);

    function adminFeeInBasisPoints() external view returns (uint16);

    // solhint-disable-next-line func-name-mixedcase
    function LOAN_COORDINATOR() external view returns (bytes32);

    function loanIdToLoan(uint32)
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            address,
            uint32,
            uint16,
            uint16,
            address,
            uint64,
            address,
            address
        );

    function loanRepaidOrLiquidated(uint32) external view returns (bool);

    function getWhetherNonceHasBeenUsedForUser(address _user, uint256 _nonce) external view returns (bool);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.19;

/**
 * @title  LoanData
 * @author NFTfi
 * @notice An interface containg the main Loan struct shared by Direct Loans types.
 */
interface LoanData {
    /* ********** */
    /* DATA TYPES */
    /* ********** */

    /**
     * @notice The main Loan Terms struct. This data is saved upon loan creation.
     *
     * @param loanERC20Denomination - The address of the ERC20 contract of the currency being used as principal/interest
     * for this loan.
     * @param loanPrincipalAmount - The original sum of money transferred from lender to borrower at the beginning of
     * the loan, measured in loanERC20Denomination's smallest units.
     * @param maximumRepaymentAmount - The maximum amount of money that the borrower would be required to retrieve their
     * collateral, measured in the smallest units of the ERC20 currency used for the loan. The borrower will always have
     * to pay this amount to retrieve their collateral, regardless of whether they repay early.
     * @param nftCollateralContract - The address of the the NFT collateral contract.
     * @param nftCollateralWrapper - The NFTfi wrapper of the NFT collateral contract.
     * @param nftCollateralId - The ID within the NFTCollateralContract for the NFT being used as collateral for this
     * loan. The NFT is stored within this contract during the duration of the loan.
     * @param loanStartTime - The block.timestamp when the loan first began (measured in seconds).
     * @param loanDuration - The amount of time (measured in seconds) that can elapse before the lender can liquidate
     * the loan and seize the underlying collateral NFT.
     * @param loanInterestRateForDurationInBasisPoints - This is the interest rate (measured in basis points, e.g.
     * hundreths of a percent) for the loan, that must be repaid pro-rata by the borrower at the conclusion of the loan
     * or risk seizure of their nft collateral. Note if the type of the loan is fixed then this value  is not used and
     * is irrelevant so it should be set to 0.
     * @param loanAdminFeeInBasisPoints - The percent (measured in basis points) of the interest earned that will be
     * taken as a fee by the contract admins when the loan is repaid. The fee is stored in the loan struct to prevent an
     * attack where the contract admins could adjust the fee right before a loan is repaid, and take all of the interest
     * earned.
     * @param borrower
     */
    struct LoanTerms {
        uint256 loanPrincipalAmount;
        uint256 maximumRepaymentAmount;
        uint256 nftCollateralId;
        address loanERC20Denomination;
        uint32 loanDuration;
        uint16 loanInterestRateForDurationInBasisPoints;
        uint16 loanAdminFeeInBasisPoints;
        address nftCollateralWrapper;
        uint64 loanStartTime;
        address nftCollateralContract;
        address borrower;
    }

    /**
     * @notice Some extra Loan's settings struct. This data is saved upon loan creation.
     * We need this to avoid stack too deep errors.
     *
     * @param revenueSharePartner - The address of the partner that will receive the revenue share.
     * @param revenueShareInBasisPoints - The percent (measured in basis points) of the admin fee amount that will be
     * taken as a revenue share for a t
     * @param referralFeeInBasisPoints - The percent (measured in basis points) of the loan principal amount that will
     * be taken as a fee to pay to the referrer, 0 if the lender is not paying referral fee.he partner, at the moment
     * the loan is begun.
     */
    struct LoanExtras {
        address revenueSharePartner;
        uint16 revenueShareInBasisPoints;
        uint16 referralFeeInBasisPoints;
    }

    /**
     * @notice The offer made by the lender. Used as parameter on both acceptOffer (initiated by the borrower)
     *
     * @param loanERC20Denomination - The address of the ERC20 contract of the currency being used as principal/interest
     * for this loan.
     * @param loanPrincipalAmount - The original sum of money transferred from lender to borrower at the beginning of
     * the loan, measured in loanERC20Denomination's smallest units.
     * @param maximumRepaymentAmount - The maximum amount of money that the borrower would be required to retrieve their
     *  collateral, measured in the smallest units of the ERC20 currency used for the loan. The borrower will always
     * have to pay this amount to retrieve their collateral, regardless of whether they repay early.
     * @param nftCollateralContract - The address of the ERC721 contract of the NFT collateral.
     * @param nftCollateralId - The ID within the NFTCollateralContract for the NFT being used as collateral for this
     * loan. The NFT is stored within this contract during the duration of the loan.
     * @param referrer - The address of the referrer who found the lender matching the listing, Zero address to signal
     * this there is no referrer.
     * @param loanDuration - The amount of time (measured in seconds) that can elapse before the lender can liquidate
     * the loan and seize the underlying collateral NFT.
     * @param loanAdminFeeInBasisPoints - The percent (measured in basis points) of the interest earned that will be
     * taken as a fee by the contract admins when the loan is repaid. The fee is stored in the loan struct to prevent an
     * attack where the contract admins could adjust the fee right before a loan is repaid, and take all of the interest
     * earned.
     */
    struct Offer {
        uint256 loanPrincipalAmount;
        uint256 maximumRepaymentAmount;
        uint256 nftCollateralId;
        address nftCollateralContract;
        uint32 loanDuration;
        uint16 loanAdminFeeInBasisPoints;
        address loanERC20Denomination;
        address referrer;
    }

    /**
     * @notice Signature related params. Used as parameter on both acceptOffer (containing borrower signature)
     *
     * @param signer - The address of the signer. The borrower for `acceptOffer`
     * @param nonce - The nonce referred here is not the same as an Ethereum account's nonce.
     * We are referring instead to a nonce that is used by the lender or the borrower when they are first signing
     * off-chain NFTfi orders. These nonce can be any uint256 value that the user has not previously used to sign an
     * off-chain order. Each nonce can be used at most once per user within NFTfi, regardless of whether they are the
     * lender or the borrower in that situation. This serves two purposes:
     * - First, it prevents replay attacks where an attacker would submit a user's off-chain order more than once.
     * - Second, it allows a user to cancel an off-chain order by calling NFTfi.cancelLoanCommitmentBeforeLoanHasBegun()
     * , which marks the nonce as used and prevents any future loan from using the user's off-chain order that contains
     * that nonce.
     * @param expiry - Date when the signature expires
     * @param signature - The ECDSA signature of the borrower or the lender, obtained off-chain ahead of time, signing
     * the following combination of parameters:
     * - Lender:
     *   - Offer.loanERC20Denomination
     *   - Offer.loanPrincipalAmount
     *   - Offer.maximumRepaymentAmount
     *   - Offer.nftCollateralContract
     *   - Offer.nftCollateralId
     *   - Offer.referrer
     *   - Offer.loanDuration
     *   - Offer.loanAdminFeeInBasisPoints
     *   - Signature.signer,
     *   - Signature.nonce,
     *   - Signature.expiry,
     *   - address of the loan type contract
     *   - chainId
     */
    struct Signature {
        uint256 nonce;
        uint256 expiry;
        address signer;
        bytes signature;
    }

    /**
     * inclusive min and max Id ranges for collection offers on collections,
     * like ArtBlocks, where multiple collections are defined on one contract differentiated by id-ranges
     */
    struct CollectionIdRange {
        uint256 minId;
        uint256 maxId;
    }

    /**
     * @notice Some extra parameters that the borrower needs to set when accepting an offer.
     *
     * @param revenueSharePartner - The address of the partner that will receive the revenue share.
     * @param referralFeeInBasisPoints - The percent (measured in basis points) of the loan principal amount that will
     * be taken as a fee to pay to the referrer, 0 if the lender is not paying referral fee.
     */
    struct BorrowerSettings {
        address revenueSharePartner;
        uint16 referralFeeInBasisPoints;
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.8.19;

/**
 * @title ContractKeys
 * @author NFTfi
 * @dev Common library for contract keys
 */
library ContractKeys {
    bytes32 public constant PERMITTED_ERC20S = bytes32("PERMITTED_ERC20S");
    bytes32 public constant PERMITTED_NFTS = bytes32("PERMITTED_NFTS");
    bytes32 public constant PERMITTED_PARTNERS = bytes32("PERMITTED_PARTNERS");
    bytes32 public constant NFT_TYPE_REGISTRY = bytes32("NFT_TYPE_REGISTRY");
    bytes32 public constant LOAN_REGISTRY = bytes32("LOAN_REGISTRY");
    bytes32 public constant PERMITTED_SNFT_RECEIVER = bytes32("PERMITTED_SNFT_RECEIVER");

    /**
     * @notice Returns the bytes32 representation of a string
     * @param _key the string key
     * @return id bytes32 representation
     */
    function getIdFromStringKey(string memory _key) external pure returns (bytes32 id) {
        require(bytes(_key).length <= 32, "invalid key");

        // solhint-disable-next-line no-inline-assembly
        assembly {
            id := mload(add(_key, 32))
        }
    }
}

{
  "metadata": {
    "bytecodeHash": "none",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 100
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"uint32","name":"_loanId","type":"uint32"},{"internalType":"contract INftfiHub","name":"_hub","type":"INftfiHub"}],"name":"checkLoanIdValidity","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_interestDue","type":"uint256"},{"internalType":"uint256","name":"_adminFeeInBasisPoints","type":"uint256"}],"name":"computeAdminFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"_loanPrincipalAmount","type":"uint256"},{"internalType":"uint256","name":"_referralFeeInBasisPoints","type":"uint256"},{"internalType":"address","name":"_referrer","type":"address"}],"name":"computeReferralFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"_adminFee","type":"uint256"},{"internalType":"uint256","name":"_revenueShareInBasisPoints","type":"uint256"}],"name":"computeRevenueShare","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"_revenueSharePartner","type":"address"},{"internalType":"contract INftfiHub","name":"_hub","type":"INftfiHub"}],"name":"getRevenueSharePercent","outputs":[{"internalType":"uint16","name":"","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"_loanId","type":"uint32"},{"internalType":"contract INftfiHub","name":"_hub","type":"INftfiHub"}],"name":"payBackChecks","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"loanPrincipalAmount","type":"uint256"},{"internalType":"uint256","name":"maximumRepaymentAmount","type":"uint256"},{"internalType":"uint256","name":"nftCollateralId","type":"uint256"},{"internalType":"address","name":"loanERC20Denomination","type":"address"},{"internalType":"uint32","name":"loanDuration","type":"uint32"},{"internalType":"uint16","name":"loanInterestRateForDurationInBasisPoints","type":"uint16"},{"internalType":"uint16","name":"loanAdminFeeInBasisPoints","type":"uint16"},{"internalType":"address","name":"nftCollateralWrapper","type":"address"},{"internalType":"uint64","name":"loanStartTime","type":"uint64"},{"internalType":"address","name":"nftCollateralContract","type":"address"},{"internalType":"address","name":"borrower","type":"address"}],"internalType":"struct LoanData.LoanTerms","name":"_loan","type":"tuple"},{"internalType":"uint32","name":"_loanId","type":"uint32"},{"internalType":"uint32","name":"_newLoanDuration","type":"uint32"},{"internalType":"uint256","name":"_newMaximumRepaymentAmount","type":"uint256"},{"internalType":"uint256","name":"_lenderNonce","type":"uint256"},{"internalType":"contract INftfiHub","name":"_hub","type":"INftfiHub"}],"name":"renegotiationChecks","outputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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