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// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/interfaces/IERC1271.sol";
import "@openzeppelin/contracts/access/AccessControlEnumerable.sol";
import "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

import "./interfaces/IOriginationController.sol";
import "./interfaces/ILoanCore.sol";
import "./interfaces/IERC721Permit.sol";
import "./interfaces/ISignatureVerifier.sol";
import "./interfaces/IFeeController.sol";

import "./libraries/InterestCalculator.sol";
import "./libraries/FeeLookups.sol";
import "./verifiers/ArcadeItemsVerifier.sol";
import {
    OC_ZeroAddress,
    OC_InvalidState,
    OC_InvalidVerifier,
    OC_BatchLengthMismatch,
    OC_PredicateFailed,
    OC_PredicatesArrayEmpty,
    OC_SelfApprove,
    OC_ApprovedOwnLoan,
    OC_InvalidSignature,
    OC_CallerNotParticipant,
    OC_SideMismatch,
    OC_PrincipalTooLow,
    OC_LoanDuration,
    OC_InterestRate,
    OC_SignatureIsExpired,
    OC_RolloverCurrencyMismatch,
    OC_RolloverCollateralMismatch,
    OC_InvalidCurrency,
    OC_InvalidCollateral,
    OC_ZeroArrayElements,
    OC_ArrayTooManyElements
} from "./errors/Lending.sol";

/**
 * @title OriginationController
 * @author Non-Fungible Technologies, Inc.
 *
 * The Origination Controller is the entry point for all new loans
 * in the Arcade.xyz lending protocol. This contract has the exclusive
 * responsibility of creating new loans in LoanCore. All permissioning,
 * signature verification, and collateral verification takes place in
 * this contract. To originate a loan, the controller also takes custody
 * of both the collateral and loan principal.
 */
contract OriginationController is
    IOriginationController,
    InterestCalculator,
    FeeLookups,
    EIP712,
    ReentrancyGuard,
    AccessControlEnumerable
{
    using SafeERC20 for IERC20;

    // ============================================ STATE ==============================================


    // =================== Constants =====================

    bytes32 public constant ADMIN_ROLE = keccak256("ADMIN");
    bytes32 public constant WHITELIST_MANAGER_ROLE = keccak256("WHITELIST_MANAGER");

    /// @notice EIP712 type hash for bundle-based signatures.
    bytes32 private constant _TOKEN_ID_TYPEHASH =
        keccak256(
            // solhint-disable-next-line max-line-length
            "LoanTerms(uint256 proratedInterestRate,uint256 principal,address collateralAddress,uint96 durationSecs,uint256 collateralId,address payableCurrency,uint96 deadline,bytes32 affiliateCode,uint160 nonce,uint8 side)"
        );

    /// @notice EIP712 type hash for item-based signatures.
    bytes32 private constant _ITEMS_TYPEHASH =
        keccak256(
            // solhint-disable max-line-length
            "LoanTermsWithItems(uint256 proratedInterestRate,uint256 principal,address collateralAddress,uint96 durationSecs,Predicate[] items,address payableCurrency,uint96 deadline,bytes32 affiliateCode,uint160 nonce,uint8 side)Predicate(bytes data,address verifier)"
        );

    /// @notice EIP712 type hash for Predicate.
    bytes32 public constant _PREDICATE_TYPEHASH =
        keccak256(
            "Predicate(bytes data,address verifier)"
        );

    // =============== Contract References ===============

    ILoanCore private immutable loanCore;
    IFeeController private immutable feeController;

    // ================= Approval State ==================

    /// @notice Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _signerApprovals;
    /// @notice Mapping from address to whether that verifier contract has been whitelisted
    mapping(address => bool) public allowedVerifiers;
    /// @notice Mapping from ERC20 token address to boolean indicating allowed payable currencies and set minimums
    mapping(address => Currency) public allowedCurrencies;
    /// @notice Mapping from ERC721 or ERC1155 token address to boolean indicating allowed collateral types
    mapping(address => bool) public allowedCollateral;

    // ========================================== CONSTRUCTOR ===========================================

    /**
     * @notice Creates a new origination controller contract, also initializing
     *         the parent signature verifier.
     *
     * @dev For this controller to work, it needs to be granted the ORIGINATOR_ROLE
     *      in loan core after deployment.
     *
     * @param _loanCore                     The address of the loan core logic of the protocol.
     * @param _feeController                The address of the fee logic of the protocol.
     */
    constructor(address _loanCore, address _feeController) EIP712("OriginationController", "3") {
        if (_loanCore == address(0)) revert OC_ZeroAddress("loanCore");
        if (_feeController == address(0)) revert OC_ZeroAddress("feeController");

        _setupRole(ADMIN_ROLE, msg.sender);
        _setRoleAdmin(ADMIN_ROLE, ADMIN_ROLE);

        _setupRole(WHITELIST_MANAGER_ROLE, msg.sender);
        _setRoleAdmin(WHITELIST_MANAGER_ROLE, ADMIN_ROLE);

        loanCore = ILoanCore(_loanCore);
        feeController = IFeeController(_feeController);
    }

    // ==================================== ORIGINATION OPERATIONS ======================================

    /**
     * @notice Initializes a loan with Loan Core.
     * @notice Works with either wrapped bundles with an ID, or specific ERC721 unwrapped NFTs.
     *         In that case, collateralAddress should be the token contract.
     *
     * @dev The caller must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must come from the opposite side of the loan as the caller.
     *
     * @param loanTerms                     The terms agreed by the lender and borrower.
     * @param borrower                      Address of the borrower.
     * @param lender                        Address of the lender.
     * @param sig                           The loan terms signature, with v, r, s fields, and a nonce.
     * @param nonce                         The signature nonce.
     *
     * @return loanId                       The unique ID of the new loan.
     */
    function initializeLoan(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce
    ) public override returns (uint256 loanId) {
        _validateLoanTerms(loanTerms);

        // Determine if signature needs to be on the borrow or lend side
        Side neededSide = isSelfOrApproved(borrower, msg.sender) ? Side.LEND : Side.BORROW;

        (bytes32 sighash, address externalSigner) = recoverTokenSignature(
            loanTerms,
            sig,
            nonce,
            neededSide
        );

        _validateCounterparties(borrower, lender, msg.sender, externalSigner, sig, sighash, neededSide);

        loanCore.consumeNonce(externalSigner, nonce);
        loanId = _initialize(loanTerms, borrower, lender);
    }

    /**
     * @notice Initializes a loan with Loan Core.
     * @notice Compared to initializeLoan, this uses custom predicates to verify collateral.
     *
     * @dev The caller must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must come from the opposite side of the loan as the caller.
     *
     * @param loanTerms                     The terms agreed by the lender and borrower.
     * @param borrower                      Address of the borrower.
     * @param lender                        Address of the lender.
     * @param sig                           The loan terms signature, with v, r, s fields, and a nonce.
     * @param nonce                         The signature nonce.
     * @param itemPredicates                The predicate rules for the items in the bundle.
     *
     * @return loanId                       The unique ID of the new loan.
     */
    function initializeLoanWithItems(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        LoanLibrary.Predicate[] calldata itemPredicates
    ) public override returns (uint256 loanId) {
        _validateLoanTerms(loanTerms);
        if (itemPredicates.length == 0) revert OC_PredicatesArrayEmpty();

        bytes32 encodedPredicates = _encodePredicates(itemPredicates);

        // Determine if signature needs to be on the borrow or lend side
        Side neededSide = isSelfOrApproved(borrower, msg.sender) ? Side.LEND : Side.BORROW;

        (bytes32 sighash, address externalSigner) = recoverItemsSignature(
            loanTerms,
            sig,
            nonce,
            neededSide,
            encodedPredicates
        );

        _validateCounterparties(borrower, lender, msg.sender, externalSigner, sig, sighash, neededSide);

        loanCore.consumeNonce(externalSigner, nonce);
        loanId = _initialize(loanTerms, borrower, lender);

        // Run predicates check at the end of the function, after vault is in escrow. This makes sure
        // that re-entrancy was not employed to withdraw collateral after the predicates check occurs.
        _runPredicatesCheck(borrower, lender, loanTerms, itemPredicates);
    }

    /**
     * @notice Initializes a loan with Loan Core, with a permit signature instead of pre-approved collateral.
     *
     * @dev The caller must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must come from the opposite side of the loan as the caller.
     *
     * @param loanTerms                     The terms agreed by the lender and borrower.
     * @param borrower                      Address of the borrower.
     * @param lender                        Address of the lender.
     * @param sig                           The loan terms signature, with v, r, s fields.
     * @param nonce                         The signature nonce for the loan terms signature.
     * @param collateralSig                 The collateral permit signature, with v, r, s fields.
     * @param permitDeadline                The last timestamp for which the signature is valid.
     *
     * @return loanId                       The unique ID of the new loan.
     */
    function initializeLoanWithCollateralPermit(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        Signature calldata collateralSig,
        uint256 permitDeadline
    ) external override returns (uint256 loanId) {
        IERC721Permit(loanTerms.collateralAddress).permit(
            borrower,
            address(loanCore),
            loanTerms.collateralId,
            permitDeadline,
            collateralSig.v,
            collateralSig.r,
            collateralSig.s
        );

        loanId = initializeLoan(loanTerms, borrower, lender, sig, nonce);
}

    /**
     * @notice Initializes a loan with Loan Core, with a permit signature instead of pre-approved collateral.
     * @notice Compared to initializeLoanWithCollateralPermit, this verifies the specific items in a bundle.
     *
     * @dev The caller must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must be a borrower or lender, or approved by a borrower or lender.
     * @dev The external signer must come from the opposite side of the loan as the caller.
     *
     * @param loanTerms                     The terms agreed by the lender and borrower.
     * @param borrower                      Address of the borrower.
     * @param lender                        Address of the lender.
     * @param sig                           The loan terms signature, with v, r, s fields.
     * @param nonce                         The signature nonce for the loan terms signature.
     * @param collateralSig                 The collateral permit signature, with v, r, s fields.
     * @param permitDeadline                The last timestamp for which the signature is valid.
     * @param itemPredicates                The predicate rules for the items in the bundle.
     *
     * @return loanId                       The unique ID of the new loan.
     */
    function initializeLoanWithCollateralPermitAndItems(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        Signature calldata collateralSig,
        uint256 permitDeadline,
        LoanLibrary.Predicate[] calldata itemPredicates
    ) external override returns (uint256 loanId) {
        IERC721Permit(loanTerms.collateralAddress).permit(
            borrower,
            address(loanCore),
            loanTerms.collateralId,
            permitDeadline,
            collateralSig.v,
            collateralSig.r,
            collateralSig.s
        );

        loanId = initializeLoanWithItems(loanTerms, borrower, lender, sig, nonce, itemPredicates);
    }

    /**
     * @notice Rolls over an existing loan via Loan Core, using a signature for
     *         a new loan to be created. The lender can be the same lender as the
     *         loan to be rolled over, or a new lender. The net funding between the
     *         old and new loan is calculated, with funds withdrawn from relevant
     *         parties.
     *
     * @param oldLoanId                     The ID of the old loan.
     * @param loanTerms                     The terms agreed by the lender and borrower.
     * @param lender                        Address of the lender.
     * @param sig                           The loan terms signature, with v, r, s fields.
     * @param nonce                         The signature nonce for the loan terms signature.
     *
     * @return newLoanId                    The unique ID of the new loan.
     */
    function rolloverLoan(
        uint256 oldLoanId,
        LoanLibrary.LoanTerms calldata loanTerms,
        address lender,
        Signature calldata sig,
        uint160 nonce
    ) public override returns (uint256 newLoanId) {
        _validateLoanTerms(loanTerms);

        LoanLibrary.LoanData memory data = loanCore.getLoan(oldLoanId);
        if (data.state != LoanLibrary.LoanState.Active) revert OC_InvalidState(data.state);
        _validateRollover(data.terms, loanTerms);

        address borrower = IERC721(loanCore.borrowerNote()).ownerOf(oldLoanId);

        // Determine if signature needs to be on the borrow or lend side
        Side neededSide = isSelfOrApproved(borrower, msg.sender) ? Side.LEND : Side.BORROW;

        (bytes32 sighash, address externalSigner) = recoverTokenSignature(
            loanTerms,
            sig,
            nonce,
            neededSide
        );

        _validateCounterparties(borrower, lender, msg.sender, externalSigner, sig, sighash, neededSide);

        loanCore.consumeNonce(externalSigner, nonce);

        newLoanId = _rollover(oldLoanId, loanTerms, borrower, lender);
    }

    /**
     * @notice Rolls over an existing loan via Loan Core, using a signature
     *         for a new loan to create (of items type). The lender can be the same lender
     *         in the loan to be rolled over, or a new lender. The net funding between
     *         the old and new loan is calculated, with funds withdrawn from relevant
     *         parties.
     *
     * @param oldLoanId                     The ID of the old loan.
     * @param loanTerms                     The terms agreed by the lender and borrower.
     * @param lender                        Address of the lender.
     * @param sig                           The loan terms signature, with v, r, s fields.
     * @param nonce                         The signature nonce for the loan terms signature.
     * @param itemPredicates                The predicate rules for the items in the bundle.
     *
     * @return newLoanId                    The unique ID of the new loan.
     */
    function rolloverLoanWithItems(
        uint256 oldLoanId,
        LoanLibrary.LoanTerms calldata loanTerms,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        LoanLibrary.Predicate[] calldata itemPredicates
    ) public override returns (uint256 newLoanId) {
        _validateLoanTerms(loanTerms);
        if (itemPredicates.length == 0) revert OC_PredicatesArrayEmpty();

        LoanLibrary.LoanData memory data = loanCore.getLoan(oldLoanId);
        if (data.state != LoanLibrary.LoanState.Active) revert OC_InvalidState(data.state);
        _validateRollover(data.terms, loanTerms);

        address borrower = IERC721(loanCore.borrowerNote()).ownerOf(oldLoanId);

        bytes32 encodedPredicates = _encodePredicates(itemPredicates);

        // Determine if signature needs to be on the borrow or lend side
        Side neededSide = isSelfOrApproved(borrower, msg.sender) ? Side.LEND : Side.BORROW;

        (bytes32 sighash, address externalSigner) = recoverItemsSignature(
            loanTerms,
            sig,
            nonce,
            neededSide,
            encodedPredicates
        );

        _validateCounterparties(borrower, lender, msg.sender, externalSigner, sig, sighash, neededSide);

        loanCore.consumeNonce(externalSigner, nonce);

        newLoanId = _rollover(oldLoanId, loanTerms, borrower, lender);

        // Run predicates check at the end of the function, after vault is in escrow. This makes sure
        // that re-entrancy was not employed to withdraw collateral after the predicates check occurs.
        _runPredicatesCheck(borrower, lender, loanTerms, itemPredicates);
    }

    // ==================================== PERMISSION MANAGEMENT =======================================

    /**
     * @notice Approve a third party to sign or initialize loans on a counterparty's behalf.
     * @notice Useful to multisig counterparties (who cannot sign themselves) or third-party integrations.
     *
     * @param signer                        The party to set approval for.
     * @param approved                      Whether the party should be approved.
     */
    function approve(address signer, bool approved) public override {
        if (signer == msg.sender) revert OC_SelfApprove(msg.sender);

        _signerApprovals[msg.sender][signer] = approved;

        emit Approval(msg.sender, signer, approved);
    }

    /**
     * @notice Reports whether a party is approved to act on a counterparty's behalf.
     *
     * @param owner                         The grantor of permission.
     * @param signer                        The grantee of permission.
     *
     * @return isApproved                   Whether the grantee has been approved by the grantor.
     */
    function isApproved(address owner, address signer) public view virtual override returns (bool) {
        return _signerApprovals[owner][signer];
    }

    /**
     * @notice Reports whether the signer matches the target or is approved by the target.
     *
     * @param target                        The grantor of permission - should be a smart contract.
     * @param sig                           A struct containing the signature data (for checking EIP-1271).
     * @param sighash                       The hash of the signature payload (used for EIP-1271 check).
     *
     * @return bool                         Whether the signer is either the grantor themselves, or approved.
     */
    function isApprovedForContract(
        address target,
        Signature memory sig,
        bytes32 sighash
    ) public view override returns (bool) {
        bytes memory signature = abi.encodePacked(sig.r, sig.s, sig.v);

        // Append extra data if it exists
        bytes memory zeroBytes = new bytes(0);
        if (keccak256(sig.extraData) != keccak256(zeroBytes)) {
            signature = bytes.concat(signature, sig.extraData);
        }

        // Convert sig struct to bytes
        (bool success, bytes memory result) = target.staticcall(
            abi.encodeWithSelector(IERC1271.isValidSignature.selector, sighash, signature)
        );
        return (success && result.length == 32 && abi.decode(result, (bytes4)) == IERC1271.isValidSignature.selector);
    }

    /**
     * @notice Reports whether the signer matches the target or is approved by the target.
     *
     * @param target                        The grantor of permission.
     * @param signer                        The grantee of permission.
     *
     * @return isSelfOrApproved             Whether the signer is either the grantor themselves, or approved.
     */
    function isSelfOrApproved(address target, address signer) public view override returns (bool) {
        return target == signer || isApproved(target, signer);
    }

    // ==================================== SIGNATURE VERIFICATION ======================================

    /**
     * @notice Determine the external signer for a signature specifying only a collateral address and ID.
     *
     * @param loanTerms                     The terms of the loan.
     * @param sig                           The signature, with v, r, s fields.
     * @param nonce                         The signature nonce.
     * @param side                          The side of the loan being signed.
     *
     * @return sighash                      The hash that was signed.
     * @return signer                       The address of the recovered signer.
     */
    function recoverTokenSignature(
        LoanLibrary.LoanTerms calldata loanTerms,
        Signature calldata sig,
        uint160 nonce,
        Side side
    ) public view override returns (bytes32 sighash, address signer) {
        bytes32 loanHash = keccak256(
            abi.encode(
                _TOKEN_ID_TYPEHASH,
                loanTerms.proratedInterestRate,
                loanTerms.principal,
                loanTerms.collateralAddress,
                loanTerms.durationSecs,
                loanTerms.collateralId,
                loanTerms.payableCurrency,
                loanTerms.deadline,
                loanTerms.affiliateCode,
                nonce,
                uint8(side)
            )
        );

        sighash = _hashTypedDataV4(loanHash);
        signer = ECDSA.recover(sighash, sig.v, sig.r, sig.s);
    }

    /**
     * @notice Determine the external signer for a signature specifying specific items.
     * @dev    Bundle ID should _not_ be included in this signature, because the loan
     *         can be initiated with any arbitrary bundle - as long as the bundle contains the items.
     *
     * @param loanTerms                     The terms of the loan.
     * @param sig                           The loan terms signature, with v, r, s fields.
     * @param nonce                         The signature nonce.
     * @param side                          The side of the loan being signed.
     * @param itemsHash                     The required items in the specified bundle.
     *
     * @return sighash                      The hash that was signed.
     * @return signer                       The address of the recovered signer.
     */
    function recoverItemsSignature(
        LoanLibrary.LoanTerms calldata loanTerms,
        Signature calldata sig,
        uint160 nonce,
        Side side,
        bytes32 itemsHash
    ) public view override returns (bytes32 sighash, address signer) {
        bytes32 loanHash = keccak256(
            abi.encode(
                _ITEMS_TYPEHASH,
                loanTerms.proratedInterestRate,
                loanTerms.principal,
                loanTerms.collateralAddress,
                loanTerms.durationSecs,
                itemsHash,
                loanTerms.payableCurrency,
                loanTerms.deadline,
                loanTerms.affiliateCode,
                nonce,
                uint8(side)
            )
        );

        sighash = _hashTypedDataV4(loanHash);
        signer = ECDSA.recover(sighash, sig.v, sig.r, sig.s);
    }

    // ===================================== WHITELIST MANAGER UTILS =====================================

    /**
     * @notice Adds an array of payable currencies to the allowed currencies mapping.
     *
     * @dev Only callable by the whitelist manager role. Entire transaction reverts if one of the
     *      addresses is the zero address. The array of addresses passed to this
     *      function is limited to 50 elements.
     *
     * @param tokens                     Array of token addresses to add.
     * @param currencyData               Whether the token is allowed or not, and the minimum loan size.
     */
    function setAllowedPayableCurrencies(
        address[] calldata tokens,
        Currency[] calldata currencyData
    ) external override onlyRole(WHITELIST_MANAGER_ROLE) {
        if (tokens.length == 0) revert OC_ZeroArrayElements();
        if (tokens.length > 50) revert OC_ArrayTooManyElements();
        if (tokens.length != currencyData.length) revert OC_BatchLengthMismatch();

        for (uint256 i = 0; i < tokens.length;) {
            if (tokens[i] == address(0)) revert OC_ZeroAddress("token");

            allowedCurrencies[tokens[i]] = currencyData[i];
            emit SetAllowedCurrency(tokens[i], currencyData[i].isAllowed, currencyData[i].minPrincipal);

            // Can never overflow because length is bounded by 50
            unchecked {
                i++;
            }
        }
    }

    /**
     * @notice Return whether the address can be used as a loan funding currency.
     *
     * @param token                 The token to query.
     *
     * @return isAllowed            Whether the contract is verified.
     */
    function isAllowedCurrency(address token) public view override returns (bool) {
        return allowedCurrencies[token].isAllowed;
    }

    /**
     * @notice Adds an array collateral tokens to the allowed collateral mapping.
     *
     * @dev Only callable by the whitelist manager role. Entire transaction reverts if one of the
     *      addresses is the zero address. The array of addresses passed to this
     *      function is limited to 50 elements.
     *
     * @param tokens                     Array of token addresses to add.
     * @param isAllowed                  Whether the token is allowed or not.
     */
    function setAllowedCollateralAddresses(
        address[] calldata tokens,
        bool[] calldata isAllowed
    ) external override onlyRole(WHITELIST_MANAGER_ROLE) {
        if (tokens.length == 0) revert OC_ZeroArrayElements();
        if (tokens.length > 50) revert OC_ArrayTooManyElements();
        if (tokens.length != isAllowed.length) revert OC_BatchLengthMismatch();

        for (uint256 i = 0; i < tokens.length;) {
            if (tokens[i] == address(0)) revert OC_ZeroAddress("token");

            allowedCollateral[tokens[i]] = isAllowed[i];
            emit SetAllowedCollateral(tokens[i], isAllowed[i]);

            // Can never overflow because length is bounded by 50
            unchecked {
                i++;
            }
        }
    }

    /**
     * @notice Return whether the address can be used as collateral.
     *
     * @param token                The token to query.
     *
     * @return isAllowed           Whether the token can be used as collateral.
     */
    function isAllowedCollateral(address token) public view override returns (bool) {
        return allowedCollateral[token];
    }

    /**
     * @notice Batch update for verification whitelist, in case of multiple verifiers
     *         active in production.
     *
     * @param verifiers             The list of specified verifier contracts, should implement ISignatureVerifier.
     * @param isAllowed             Whether the specified contracts should be allowed, respectively.
     */
    function setAllowedVerifiers(
        address[] calldata verifiers,
        bool[] calldata isAllowed
    ) external override onlyRole(WHITELIST_MANAGER_ROLE) {
        if (verifiers.length == 0) revert OC_ZeroArrayElements();
        if (verifiers.length > 50) revert OC_ArrayTooManyElements();
        if (verifiers.length != isAllowed.length) revert OC_BatchLengthMismatch();

        for (uint256 i = 0; i < verifiers.length;) {
            if (verifiers[i] == address(0)) revert OC_ZeroAddress("verifier");

            allowedVerifiers[verifiers[i]] = isAllowed[i];
            emit SetAllowedVerifier(verifiers[i], isAllowed[i]);

            // Can never overflow because length is bounded by 50
            unchecked {
                i++;
            }
        }
    }

    /**
     * @notice Return whether the address can be used as a verifier.
     *
     * @param verifier             The verifier contract to query.
     *
     * @return isVerified          Whether the contract is verified.
     */
    function isAllowedVerifier(address verifier) public view override returns (bool) {
        return allowedVerifiers[verifier];
    }

    // =========================================== HELPERS ==============================================

    /**
     * @dev Validates argument bounds for the loan terms.
     *
     * @param terms                  The terms of the loan.
     */
    // solhint-disable-next-line code-complexity
    function _validateLoanTerms(LoanLibrary.LoanTerms memory terms) internal virtual view {
        // validate payable currency
        if (!allowedCurrencies[terms.payableCurrency].isAllowed) revert OC_InvalidCurrency(terms.payableCurrency);

        // principal must be greater than or equal to the configured minimum
        if (terms.principal < allowedCurrencies[terms.payableCurrency].minPrincipal) revert OC_PrincipalTooLow(terms.principal);

        // loan duration must be greater or equal to 1 hr and less or equal to 3 years
        if (terms.durationSecs < 3600 || terms.durationSecs > 94_608_000) revert OC_LoanDuration(terms.durationSecs);

        // interest rate must be greater than or equal to 0.01%
        // and less or equal to 10,000% (1e6 basis points)
        if (terms.proratedInterestRate < 1e18 || terms.proratedInterestRate > 1e24) revert OC_InterestRate(terms.proratedInterestRate);

        // signature must not have already expired
        if (terms.deadline < block.timestamp) revert OC_SignatureIsExpired(terms.deadline);

        // validate collateral
        if (!allowedCollateral[terms.collateralAddress]) revert OC_InvalidCollateral(terms.collateralAddress);
    }

    /**
     * @dev Validate the rules for rolling over a loan - must be using the same
     *      currency and collateral.
     *
     * @param oldTerms              The terms of the old loan, fetched from LoanCore.
     * @param newTerms              The terms of the new loan, provided by the caller.
     */
    function _validateRollover(LoanLibrary.LoanTerms memory oldTerms, LoanLibrary.LoanTerms memory newTerms)
        internal
        pure
    {
        if (newTerms.payableCurrency != oldTerms.payableCurrency)
            revert OC_RolloverCurrencyMismatch(oldTerms.payableCurrency, newTerms.payableCurrency);

        if (newTerms.collateralAddress != oldTerms.collateralAddress || newTerms.collateralId != oldTerms.collateralId)
            revert OC_RolloverCollateralMismatch(
                oldTerms.collateralAddress,
                oldTerms.collateralId,
                newTerms.collateralAddress,
                newTerms.collateralId
            );
    }

    /**
     * @dev Ensure that one counterparty has signed the loan terms, and the other
     *      has initiated the transaction.
     *
     * @param borrower                  The specified borrower for the loan.
     * @param lender                    The specified lender for the loan.
     * @param caller                    The address initiating the transaction.
     * @param signer                    The address recovered from the loan terms signature.
     * @param sig                       A struct containing the signature data (for checking EIP-1271).
     * @param sighash                   The hash of the signature payload (used for EIP-1271 check).
     * @param neededSide                The side of the loan the signature will take (lend or borrow).
     */
    // solhint-disable-next-line code-complexity
    function _validateCounterparties(
        address borrower,
        address lender,
        address caller,
        address signer,
        Signature calldata sig,
        bytes32 sighash,
        Side neededSide
    ) internal view {
        address signingCounterparty = neededSide == Side.LEND ? lender : borrower;
        address callingCounterparty = neededSide == Side.LEND ? borrower : lender;

        // Make sure the signer recovered from the loan terms is not the caller,
        // and even if the caller is approved, the caller is not the signing counterparty
        if (caller == signer || caller == signingCounterparty) revert OC_ApprovedOwnLoan(caller);

        // Check that caller can actually call this function - neededSide assignment
        // defaults to BORROW if the signature is not approved by the borrower, but it could
        // also not be a participant
        if (!isSelfOrApproved(callingCounterparty, caller) && !isApprovedForContract(callingCounterparty, sig, sighash)) {
            revert OC_CallerNotParticipant(msg.sender);
        }

        // Check signature validity
        if (!isSelfOrApproved(signingCounterparty, signer) && !isApprovedForContract(signingCounterparty, sig, sighash)) {
            revert OC_InvalidSignature(signingCounterparty, signer);
        }

        // Revert if the signer is the calling counterparty
        if (signer == callingCounterparty) revert OC_SideMismatch(signer);
    }

    /**
     * @notice Hashes each item in Predicate[] separately and concatenates these hashes for
     *         inclusion in _ITEMS_TYPEHASH.
     *
     * @dev Solidity does not support array or nested struct hashing in the keccak256 function
     *      hence the multi-step hash creation process.
     *
     * @param predicates                    The predicate items array.
     *
     * @return itemsHash                    The concatenated hash of all items in the Predicate array.
     */
    function _encodePredicates(LoanLibrary.Predicate[] memory predicates) public pure returns (bytes32 itemsHash) {
       bytes32[] memory itemHashes = new bytes32[](predicates.length);

        for (uint i = 0; i < predicates.length;){
            itemHashes[i] = keccak256(
                abi.encode(
                    _PREDICATE_TYPEHASH,
                    keccak256(predicates[i].data),
                    predicates[i].verifier
                )
            );

            // Predicates is calldata, overflow is impossible bc of calldata
            // size limits vis-a-vis gas
            unchecked {
                i++;
            }
        }

        // concatenate all predicate hashes
        itemsHash = keccak256(abi.encodePacked(itemHashes));
    }

    /**
     * @dev Run the predicates check for an items signature, sending the defined
     *      predicate payload to each defined verifier contract, and reverting
     *      if a verifier returns false.
     *
     * @param borrower              The borrower of the loan.
     * @param lender                The lender of the loan.
     * @param loanTerms             The terms of the loan.
     * @param itemPredicates        The array of predicates to check.
     */
    function _runPredicatesCheck(
        address borrower,
        address lender,
        LoanLibrary.LoanTerms memory loanTerms,
        LoanLibrary.Predicate[] calldata itemPredicates
    ) internal view {
        for (uint256 i = 0; i < itemPredicates.length;) {
            // Verify items are held in the wrapper
            address verifier = itemPredicates[i].verifier;
            if (!isAllowedVerifier(verifier)) revert OC_InvalidVerifier(verifier);

            if (!ISignatureVerifier(verifier).verifyPredicates(
                borrower,
                lender,
                loanTerms.collateralAddress,
                loanTerms.collateralId,
                itemPredicates[i].data
            )) {
                revert OC_PredicateFailed(
                    verifier,
                    borrower,
                    lender,
                    loanTerms.collateralAddress,
                    loanTerms.collateralId,
                    itemPredicates[i].data
                );
            }

            // Predicates is calldata, overflow is impossible bc of calldata
            // size limits vis-a-vis gas
            unchecked {
                i++;
            }
        }
    }

    /**
     * @dev Perform loan initialization. Take custody of both principal and
     *      collateral, and tell LoanCore to create and start a loan.
     *
     * @param loanTerms                     The terms agreed by the lender and borrower.
     * @param borrower                      Address of the borrower.
     * @param lender                        Address of the lender.
     *
     * @return loanId                       The unique ID of the new loan.
     */
    function _initialize(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender
    ) internal nonReentrant returns (uint256 loanId) {
        // get lending origination fees from fee controller
        IFeeController.FeesOrigination memory feeData = feeController.getFeesOrigination();

        // create LoanLibrary.FeeSnapshot struct from feeData
        LoanLibrary.FeeSnapshot memory feeSnapshot = LoanLibrary.FeeSnapshot({
            lenderDefaultFee: feeData.lenderDefaultFee,
            lenderInterestFee: feeData.lenderInterestFee,
            lenderPrincipalFee: feeData.lenderPrincipalFee
        });

        uint256 borrowerFee = (loanTerms.principal * feeData.borrowerOriginationFee) / BASIS_POINTS_DENOMINATOR;
        uint256 lenderFee = (loanTerms.principal * feeData.lenderOriginationFee) / BASIS_POINTS_DENOMINATOR;

        // Determine settlement amounts based on fees
        uint256 amountFromLender = loanTerms.principal + lenderFee;
        uint256 amountToBorrower = loanTerms.principal - borrowerFee;

        loanId = loanCore.startLoan(lender, borrower, loanTerms, amountFromLender, amountToBorrower, feeSnapshot);
    }

    /**
     * @dev Perform loan rollover. Take custody of both principal and
     *      collateral, and tell LoanCore to roll over the existing loan.
     *
     * @param oldLoanId                     The ID of the loan to be rolled over.
     * @param newTerms                      The terms agreed by the lender and borrower.
     * @param borrower                      Address of the borrower.
     * @param lender                        Address of the lender.
     *
     * @return loanId                       The unique ID of the new loan.
     */
    function _rollover(
        uint256 oldLoanId,
        LoanLibrary.LoanTerms calldata newTerms,
        address borrower,
        address lender
    ) internal nonReentrant returns (uint256 loanId) {
        LoanLibrary.LoanData memory oldLoanData = loanCore.getLoan(oldLoanId);
        LoanLibrary.LoanTerms memory oldTerms = oldLoanData.terms;

        address oldLender = loanCore.lenderNote().ownerOf(oldLoanId);
        IERC20 payableCurrency = IERC20(oldTerms.payableCurrency);

        // Calculate settle amounts
        RolloverAmounts memory amounts = _calculateRolloverAmounts(
            oldTerms,
            newTerms,
            lender,
            oldLender
        );

        // Collect funds based on settle amounts and total them
        uint256 settledAmount;
        if (lender != oldLender) {
            // If new lender, take new principal from new lender
            payableCurrency.safeTransferFrom(lender, address(this), amounts.amountFromLender);
            settledAmount += amounts.amountFromLender;
        }

        if (amounts.needFromBorrower > 0) {
            // Borrower owes from old loan
            payableCurrency.safeTransferFrom(borrower, address(this), amounts.needFromBorrower);
            settledAmount += amounts.needFromBorrower;
        } else if (amounts.leftoverPrincipal > 0 && lender == oldLender) {
            // If same lender, and new amount from lender is greater than old loan repayment amount,
            // take the difference from the lender
            payableCurrency.safeTransferFrom(lender, address(this), amounts.leftoverPrincipal);
            settledAmount += amounts.leftoverPrincipal;
        }

        // approve LoanCore to take the total settled amount
        payableCurrency.approve(address(loanCore), settledAmount);

        loanId = loanCore.rollover(
            oldLoanId,
            borrower,
            lender,
            newTerms,
            settledAmount,
            amounts.amountToOldLender,
            amounts.amountToLender,
            amounts.amountToBorrower
        );
    }

    /**
     * @dev Calculate the net amounts needed for the rollover from each party - the
     *      borrower, the new lender, and the old lender (can be same as new lender).
     *      Determine the amount to either pay or withdraw from the borrower, and
     *      any payments to be sent to the old lender.
     *
     * @param oldTerms              The terms struct for the old loan.
     * @param newTerms              The terms struct for the new loan.
     * @param lender                The lender for the new loan.
     * @param oldLender             The lender for the existing loan.
     *
     * @return amounts              The net amounts owed to each party.
     */
    function _calculateRolloverAmounts(
        LoanLibrary.LoanTerms memory oldTerms,
        LoanLibrary.LoanTerms calldata newTerms,
        address lender,
        address oldLender
    ) internal view returns (RolloverAmounts memory amounts) {
        // get rollover fees
        IFeeController.FeesRollover memory feeData = feeController.getFeesRollover();

        // Calculate repay amount of old loan
        uint256 interest = getInterestAmount(oldTerms.principal, oldTerms.proratedInterestRate);
        uint256 repayAmount = oldTerms.principal + interest;

        // Calculate amount to be sent to borrower for new loan minus rollover fees
        uint256 borrowerFee = (newTerms.principal * feeData.borrowerRolloverFee) / BASIS_POINTS_DENOMINATOR;
        uint256 borrowerOwedForNewLoan = newTerms.principal - borrowerFee;

        // Calculate amount to be collected from the lender for new loan plus rollover fees
        uint256 lenderFee = (newTerms.principal * feeData.lenderRolloverFee) / BASIS_POINTS_DENOMINATOR;
        amounts.amountFromLender = newTerms.principal + lenderFee;

        // Calculate net amounts based on if repayment amount for old loan is greater than
        // new loan principal minus fees
        if (repayAmount > borrowerOwedForNewLoan) {
            // amount to collect from borrower
            // new loan principal is less than old loan repayment amount
            unchecked {
                amounts.needFromBorrower = repayAmount - borrowerOwedForNewLoan;
            }
        } else {
            // amount to collect from lender (either old or new)
            amounts.leftoverPrincipal = amounts.amountFromLender - repayAmount;

            // amount to send to borrower
            unchecked {
                amounts.amountToBorrower = borrowerOwedForNewLoan - repayAmount;
            }
        }

        // Calculate lender amounts based on if the lender is the same as the old lender
        if (lender != oldLender) {
            // different lenders, repay old lender
            amounts.amountToOldLender = repayAmount;

            // different lender, new lender is owed zero tokens
            amounts.amountToLender = 0;
        } else {
            // same lender
            amounts.amountToOldLender = 0;

            // same lender, so check if the amount to collect from the lender is less than
            // the amount the lender is owed for the old loan. If so, the lender is owed the
            // difference
            if (amounts.needFromBorrower > 0 && repayAmount > amounts.amountFromLender) {
                unchecked {
                    amounts.amountToLender = repayAmount - amounts.amountFromLender;
                }
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 *
 * _Available since v4.1._
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IAccessControlEnumerable.sol";
import "./AccessControl.sol";
import "../utils/structs/EnumerableSet.sol";

/**
 * @dev Extension of {AccessControl} that allows enumerating the members of each role.
 */
abstract contract AccessControlEnumerable is IAccessControlEnumerable, AccessControl {
    using EnumerableSet for EnumerableSet.AddressSet;

    mapping(bytes32 => EnumerableSet.AddressSet) private _roleMembers;

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

    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) public view override returns (address) {
        return _roleMembers[role].at(index);
    }

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) public view override returns (uint256) {
        return _roleMembers[role].length();
    }

    /**
     * @dev Overload {grantRole} to track enumerable memberships
     */
    function grantRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
        super.grantRole(role, account);
        _roleMembers[role].add(account);
    }

    /**
     * @dev Overload {revokeRole} to track enumerable memberships
     */
    function revokeRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
        super.revokeRole(role, account);
        _roleMembers[role].remove(account);
    }

    /**
     * @dev Overload {renounceRole} to track enumerable memberships
     */
    function renounceRole(bytes32 role, address account) public virtual override(AccessControl, IAccessControl) {
        super.renounceRole(role, account);
        _roleMembers[role].remove(account);
    }

    /**
     * @dev Overload {_setupRole} to track enumerable memberships
     */
    function _setupRole(bytes32 role, address account) internal virtual override {
        super._setupRole(role, account);
        _roleMembers[role].add(account);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./ECDSA.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible,
 * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding
 * they need in their contracts using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * _Available since v3.4._
 */
abstract contract EIP712 {
    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /* solhint-enable var-name-mixedcase */

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        bytes32 hashedName = keccak256(bytes(name));
        bytes32 hashedVersion = keccak256(bytes(version));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _TYPE_HASH = typeHash;
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        } else if (error == RecoverError.InvalidSignatureV) {
            revert("ECDSA: invalid signature 'v' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        // Check the signature length
        // - case 65: r,s,v signature (standard)
        // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else if (signature.length == 64) {
            bytes32 r;
            bytes32 vs;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly {
                r := mload(add(signature, 0x20))
                vs := mload(add(signature, 0x40))
            }
            return tryRecover(hash, r, vs);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s;
        uint8 v;
        assembly {
            s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
            v := add(shr(255, vs), 27)
        }
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }
        if (v != 27 && v != 28) {
            return (address(0), RecoverError.InvalidSignatureV);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import "../libraries/LoanLibrary.sol";

interface IOriginationController {
    // ================ Data Types =============

    struct Currency {
        bool isAllowed;
        uint256 minPrincipal;
    }

    enum Side {
        BORROW,
        LEND
    }

    struct Signature {
        uint8 v;
        bytes32 r;
        bytes32 s;
        bytes extraData;
    }

    struct RolloverAmounts {
        uint256 needFromBorrower;
        uint256 leftoverPrincipal;
        uint256 amountFromLender;
        uint256 amountToOldLender;
        uint256 amountToLender;
        uint256 amountToBorrower;
    }

    // ================ Events =================

    event Approval(address indexed owner, address indexed signer, bool isApproved);
    event SetAllowedVerifier(address indexed verifier, bool isAllowed);
    event SetAllowedCurrency(address indexed currency, bool isAllowed, uint256 minPrincipal);
    event SetAllowedCollateral(address indexed collateral, bool isAllowed);

    // ============== Origination Operations ==============

    function initializeLoan(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce
    ) external returns (uint256 loanId);

    function initializeLoanWithItems(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        LoanLibrary.Predicate[] calldata itemPredicates
    ) external returns (uint256 loanId);

    function initializeLoanWithCollateralPermit(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        Signature calldata collateralSig,
        uint256 permitDeadline
    ) external returns (uint256 loanId);

    function initializeLoanWithCollateralPermitAndItems(
        LoanLibrary.LoanTerms calldata loanTerms,
        address borrower,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        Signature calldata collateralSig,
        uint256 permitDeadline,
        LoanLibrary.Predicate[] calldata itemPredicates
    ) external returns (uint256 loanId);

    function rolloverLoan(
        uint256 oldLoanId,
        LoanLibrary.LoanTerms calldata loanTerms,
        address lender,
        Signature calldata sig,
        uint160 nonce
    ) external returns (uint256 newLoanId);

    function rolloverLoanWithItems(
        uint256 oldLoanId,
        LoanLibrary.LoanTerms calldata loanTerms,
        address lender,
        Signature calldata sig,
        uint160 nonce,
        LoanLibrary.Predicate[] calldata itemPredicates
    ) external returns (uint256 newLoanId);

    // ================ Permission Management =================

    function approve(address signer, bool approved) external;

    function isApproved(address owner, address signer) external returns (bool);

    function isSelfOrApproved(address target, address signer) external returns (bool);

    function isApprovedForContract(
        address target,
        Signature calldata sig,
        bytes32 sighash
    ) external returns (bool);

    // ============== Signature Verification ==============

    function recoverTokenSignature(
        LoanLibrary.LoanTerms calldata loanTerms,
        Signature calldata sig,
        uint160 nonce,
        Side side
    ) external view returns (bytes32 sighash, address signer);

    function recoverItemsSignature(
        LoanLibrary.LoanTerms calldata loanTerms,
        Signature calldata sig,
        uint160 nonce,
        Side side,
        bytes32 itemsHash
    ) external view returns (bytes32 sighash, address signer);

    // ============== Admin Operations ==============

    function setAllowedPayableCurrencies(address[] memory _tokenAddress, Currency[] calldata currencyData) external;

    function setAllowedCollateralAddresses(address[] memory _tokenAddress, bool[] calldata isAllowed) external;

    function setAllowedVerifiers(address[] calldata verifiers, bool[] calldata isAllowed) external;

    function isAllowedCurrency(address token) external view returns (bool);

    function isAllowedCollateral(address token) external view returns (bool);

    function isAllowedVerifier(address verifier) external view returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import "../libraries/LoanLibrary.sol";
import "./IPromissoryNote.sol";

interface ILoanCore {

    // ================ Data Types =================

    struct AffiliateSplit {
        address affiliate;
        uint96 splitBps;
    }

    struct NoteReceipt {
        address token;
        uint256 amount;
    }

    // ================ Events =================

    event LoanStarted(uint256 loanId, address lender, address borrower);
    event LoanRepaid(uint256 loanId);
    event ForceRepay(uint256 loanId);
    event LoanRolledOver(uint256 oldLoanId, uint256 newLoanId);
    event LoanClaimed(uint256 loanId);
    event NoteRedeemed(address indexed token, address indexed caller, address indexed to, uint256 tokenId, uint256 amount);
    event NonceUsed(address indexed user, uint160 nonce);

    event FeesWithdrawn(address indexed token, address indexed caller, address indexed to, uint256 amount);
    event AffiliateSet(bytes32 indexed code, address indexed affiliate, uint96 splitBps);

    // ============== Lifecycle Operations ==============

    function startLoan(
        address lender,
        address borrower,
        LoanLibrary.LoanTerms calldata terms,
        uint256 _amountFromLender,
        uint256 _amountToBorrower,
        LoanLibrary.FeeSnapshot calldata feeSnapshot
    ) external returns (uint256 loanId);

    function repay(
        uint256 loanId,
        address payer,
        uint256 _amountFromPayer,
        uint256 _amountToLender
    ) external;

    function forceRepay(
        uint256 loanId,
        address payer,
        uint256 _amountFromPayer,
        uint256 _amountToLender
    ) external;

    function claim(
        uint256 loanId,
        uint256 _amountFromLender
    ) external;

    function redeemNote(
        uint256 loanId,
        uint256 _amountFromLender,
        address to
    ) external;

    function rollover(
        uint256 oldLoanId,
        address borrower,
        address lender,
        LoanLibrary.LoanTerms calldata terms,
        uint256 _settledAmount,
        uint256 _amountToOldLender,
        uint256 _amountToLender,
        uint256 _amountToBorrower
    ) external returns (uint256 newLoanId);

    // ============== Nonce Management ==============

    function consumeNonce(address user, uint160 nonce) external;

    function cancelNonce(uint160 nonce) external;

    // ============== Fee Management ==============

    function withdraw(address token, uint256 amount, address to) external;

    function withdrawProtocolFees(address token, address to) external;

    // ============== Admin Operations ==============

    function setAffiliateSplits(bytes32[] calldata codes, AffiliateSplit[] calldata splits) external;

    // ============== View Functions ==============

    function getLoan(uint256 loanId) external view returns (LoanLibrary.LoanData calldata loanData);

    function getNoteReceipt(uint256 loanId) external view returns (address token, uint256 amount);

    function isNonceUsed(address user, uint160 nonce) external view returns (bool);

    function borrowerNote() external view returns (IPromissoryNote);

    function lenderNote() external view returns (IPromissoryNote);

}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

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

interface IERC721Permit is IERC721 {
    // ================ Permit Functionality ================

    function permit(
        address owner,
        address spender,
        uint256 tokenId,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    // ================ View Functions ================

    function nonces(address owner) external view returns (uint256);

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

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

interface ISignatureVerifier {
    // ============== Collateral Verification ==============

    function verifyPredicates(
        address borrower,
        address lender,
        address collateralAddress,
        uint256 collateralId,
        bytes calldata predicates
    ) external view returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

interface IFeeController {
    // ================ Structs ================

    struct FeesOrigination {
        uint16 borrowerOriginationFee;
        uint16 lenderOriginationFee;
        uint16 lenderDefaultFee;
        uint16 lenderInterestFee;
        uint16 lenderPrincipalFee;
    }

    struct FeesRollover {
        uint16 borrowerRolloverFee;
        uint16 lenderRolloverFee;
    }

    // ================ Events =================

    event SetLendingFee(bytes32 indexed id, uint16 fee);

    event SetVaultMintFee(uint64 fee);

    // ================ Getter/Setter =================

    function setLendingFee(bytes32 id, uint16 fee) external;

    function setVaultMintFee(uint64 fee) external;

    function getLendingFee(bytes32 id) external view returns (uint16);

    function getVaultMintFee() external view returns (uint64);

    function getFeesOrigination() external view returns (FeesOrigination memory);

    function getFeesRollover() external view returns (FeesRollover memory);

    function getMaxLendingFee(bytes32 id) external view returns (uint16);

    function getMaxVaultMintFee() external view returns (uint64);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

/**
 * @title InterestCalculator
 * @author Non-Fungible Technologies, Inc.
 *
 * Interface for calculating the interest amount
 * given an interest rate and principal amount. Assumes
 * that the interestRate is already expressed over the desired
 * time period.
 */
abstract contract InterestCalculator {
    // ============================================ STATE ==============================================

    /// @dev The units of precision equal to the minimum interest of 1 basis point.
    uint256 public constant INTEREST_RATE_DENOMINATOR = 1e18;

    uint256 public constant BASIS_POINTS_DENOMINATOR = 1e4;

    // ======================================== CALCULATIONS ===========================================

    /**
     * @notice Calculate the interest due over a full term.
     *
     * @dev Interest and principal must be entered with 18 units of
     *      precision from the basis point unit (e.g. 1e18 == 0.01%)
     *
     * @param principal                             Principal amount in the loan terms.
     * @param proratedInterestRate                  Interest rate in the loan terms, prorated over loan duration.
     *
     * @return interest                             The amount of interest due.
     */
    function getInterestAmount(uint256 principal, uint256 proratedInterestRate) public pure returns (uint256) {
        return principal * proratedInterestRate / (INTEREST_RATE_DENOMINATOR * BASIS_POINTS_DENOMINATOR);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

/**
 * @title FeeLookups
 * @author Non-Fungible Technologies, Inc.
 *
 * Enumerates unique identifiers for fee identifiers
 * that the lending protocol uses.
 */
abstract contract FeeLookups {
    /// @dev Origination fees: amount in bps, payable in loan token
    bytes32 public constant FL_01 = keccak256("BORROWER_ORIGINATION_FEE");
    bytes32 public constant FL_02 = keccak256("LENDER_ORIGINATION_FEE");

    /// @dev Rollover fees: amount in bps, payable in loan token
    bytes32 public constant FL_03 = keccak256("BORROWER_ROLLOVER_FEE");
    bytes32 public constant FL_04 = keccak256("LENDER_ROLLOVER_FEE");

    /// @dev Loan closure fees: amount in bps, payable in loan token
    bytes32 public constant FL_05 = keccak256("LENDER_DEFAULT_FEE");
    bytes32 public constant FL_06 = keccak256("LENDER_INTEREST_FEE");
    bytes32 public constant FL_07 = keccak256("LENDER_PRINCIPAL_FEE");
    bytes32 public constant FL_08 = keccak256("LENDER_REDEEM_FEE");
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import "../interfaces/ISignatureVerifier.sol";
import "../interfaces/IVaultFactory.sol";

import {
    IV_NoAmount,
    IV_InvalidWildcard,
    IV_ItemMissingAddress,
    IV_InvalidCollateralType,
    IV_NoPredicates,
    IV_InvalidCollateralId
} from "../errors/Lending.sol";

/**
 * @title ArcadeItemsVerifier
 * @author Non-Fungible Technologies, Inc.
 *
 * This contract can be used for verifying complex signature-encoded
 * bundle descriptions. This resolves on a new array of SignatureItems[],
 * which outside of verification, is passed around as bytes memory.
 *
 * Each SignatureItem has the following fields:
 *      - cType (collateral Type)
 *      - asset (contract address of the asset)
 *      - tokenId (token ID of the asset, if applicable)
 *      - amount (amount of the asset, if applicable - if ERC721, set to "1")
 *      - anyIdAllowed (whether a wildcard is supported - see below)
 *
 * - For token ids part of ERC721, other features beyond direct tokenIds are supported:
 *      - If anyIdAllowed is true, then any token ID can be passed - the field will be ignored.
 *      - If anyIdAllowed is true, then the "amount" field can be read to require
 *          a specific amount of assets from the collection.
 *      - Wildcard token ids are not supported for ERC1155 or ERC20.
 * - All amounts are taken as minimums. For instance, if the "amount" field of an ERC1155 is 5,
 *      then a bundle with 8 of those ERC1155s are accepted.
 * - For an ERC20 cType, tokenId is ignored. For an ERC721 cType, amount is ignored unless wildcard (see above).
        If a wildcard is used, 0 amount is invalid, and all nonzero amounts are ignored.
 *
 * - Any deviation from the above rules represents an unparseable signature and will always
 *      return invalid.
 *
 * - All multi-item signatures assume AND - any optional expressed by OR
 *      can be implemented by simply signing multiple separate signatures.
 */
contract ArcadeItemsVerifier is ISignatureVerifier {
    /// @dev Enum describing the collateral type of a signature item
    enum CollateralType {
        ERC_721,
        ERC_1155,
        ERC_20
    }

    /// @dev Enum describing each item that should be validated
    struct SignatureItem {
        // The type of collateral - which interface does it implement
        CollateralType cType;
        // The address of the collateral contract
        address asset;
        // The token ID of the collateral (only applicable to 721 and 1155).
        uint256 tokenId;
        // The minimum amount of collateral. For ERC721 assets, pass 1 or the
        // amount of assets needed to be held for a wildcard predicate. If the
        // tokenId is specified, the amount is assumed to be 1.
        uint256 amount;
        // Whether any token ID should be allowed. Only applies to ERC721.
        // Supersedes tokenId.
        bool anyIdAllowed;
    }

    // ==================================== COLLATERAL VERIFICATION =====================================

    /**
     * @notice Verify that the items specified by the packed SignatureItem array are held by the vault.
     * @dev    Reverts on a malformed SignatureItem, returns false on missing contents.
     *
     *         Verification for empty predicates array has been addressed in initializeLoanWithItems and
     *         rolloverLoanWithItems.
     *
     * @param collateralAddress             The address of the loan's collateral.
     * @param collateralId                  The tokenId of the loan's collateral.
     * @param predicates                    The calldata needed for the verifier.
     *
     * @return verified                     Whether the bundle contains the specified items.
     */
    // solhint-disable-next-line code-complexity
    function verifyPredicates(
        address, address,
        address collateralAddress,
        uint256 collateralId,
        bytes calldata predicates
    ) external view override returns (bool) {
        address vault = IVaultFactory(collateralAddress).instanceAt(collateralId);

        // Make sure vault address, converted back into uint256, matches the original
        // collateralId. An arbitrary collateralId could theoretically collide with the
        // another vault's address, meaning the wrong vault would be checked.
        if (collateralId != uint256(uint160(vault))) revert IV_InvalidCollateralId(collateralId);

        // Unpack items
        SignatureItem[] memory items = abi.decode(predicates, (SignatureItem[]));
        if (items.length == 0) revert IV_NoPredicates();

        for (uint256 i = 0; i < items.length;) {
            SignatureItem memory item = items[i];

            // No asset provided
            if (item.asset == address(0)) revert IV_ItemMissingAddress();

            // No amount provided
            if (item.amount == 0) revert IV_NoAmount(item.asset, item.amount);


            if (item.cType == CollateralType.ERC_721) {
                IERC721 asset = IERC721(item.asset);

                // Wildcard, but vault has no assets or not enough specified
                if (item.anyIdAllowed && asset.balanceOf(vault) < item.amount) return false;
                // Does not own specifically specified asset
                if (!item.anyIdAllowed && asset.ownerOf(item.tokenId) != vault) return false;
            } else if (item.cType == CollateralType.ERC_1155) {
                IERC1155 asset = IERC1155(item.asset);

                // Wildcard not allowed, since we can't check overall 1155 balances
                if (item.anyIdAllowed) revert IV_InvalidWildcard(item.asset);

                // Does not own specifically specified asset
                if (asset.balanceOf(vault, item.tokenId) < item.amount) return false;
            } else {
                IERC20 asset = IERC20(item.asset);

                // Wildcard not allowed, since nonsensical
                if (item.anyIdAllowed) revert IV_InvalidWildcard(item.asset);

                // Does not own specifically specified asset
                if (asset.balanceOf(vault) < item.amount) return false;
            }

            // Predicates is calldata, overflow is impossible bc of calldata
            // size limits vis-a-vis gas
            unchecked {
                i++;
            }
        }

        // Loop completed - all items found
        return true;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import "../libraries/LoanLibrary.sol";

/**
 * @title LendingErrors
 * @author Non-Fungible Technologies, Inc.
 *
 * This file contains custom errors for the core lending protocol contracts, with errors
 * prefixed by the contract that throws them (e.g., "OC_" for OriginationController).
 * Errors located in one place to make it possible to holistically look at all
 * protocol failure cases.
 */

// ==================================== ORIGINATION CONTROLLER ======================================
/// @notice All errors prefixed with OC_, to separate from other contracts in the protocol.

/**
 * @notice Zero address passed in where not allowed.
 *
 * @param addressType                  The name of the parameter for which a zero address was provided.
 */
error OC_ZeroAddress(string addressType);

/**
 * @notice Ensure valid loan state for loan lifceycle operations.
 *
 * @param state                         Current state of a loan according to LoanState enum.
 */
error OC_InvalidState(LoanLibrary.LoanState state);

/**
 * @notice Loan duration must be greater than 1hr and less than 3yrs.
 *
 * @param durationSecs                 Total amount of time in seconds.
 */
error OC_LoanDuration(uint256 durationSecs);

/**
 * @notice Interest must be greater than 0.01% and less than 10,000%. (interestRate / 1e18 >= 1)
 *
 * @param interestRate                  InterestRate with 1e18 multiplier.
 */
error OC_InterestRate(uint256 interestRate);

/**
 * @notice One of the predicates for item verification failed.
 *
 * @param borrower                      The address of the borrower.
 * @param lender                        The address of the lender.
 * @param verifier                      The address of the verifier contract.
 * @param collateralAddress             The address of the collateral token.
 * @param collateralId                  The token ID of the collateral.
 * @param data                          The verification data (to be parsed by verifier).
 */
error OC_PredicateFailed(
    address borrower,
    address lender,
    address verifier,
    address collateralAddress,
    uint256 collateralId,
    bytes data
);

/**
 * @notice The predicates array is empty.
 */
error OC_PredicatesArrayEmpty();

/**
 * @notice A caller attempted to approve themselves.
 *
 * @param caller                        The caller of the approve function.
 */
error OC_SelfApprove(address caller);

/**
 * @notice A caller attempted to originate a loan with their own signature.
 *
 * @param caller                        The caller of the approve function, who was also the signer.
 */
error OC_ApprovedOwnLoan(address caller);

/**
 * @notice The signature could not be recovered to the counterparty or approved party.
 *
 * @param target                        The target party of the signature, which should either be the signer,
 *                                      or someone who has approved the signer.
 * @param signer                        The signer determined from ECDSA.recover.
 */
error OC_InvalidSignature(address target, address signer);

/**
 * @notice The verifier contract specified in a predicate has not been whitelisted.
 *
 * @param verifier                      The verifier the caller attempted to use.
 */
error OC_InvalidVerifier(address verifier);

/**
 * @notice The function caller was neither borrower or lender, and was not approved by either.
 *
 * @param caller                        The unapproved function caller.
 */
error OC_CallerNotParticipant(address caller);

/**
 * @notice Signer is attempting to take the wrong side of the loan.
 *
 * @param signer                       The address of the external signer.
 */
error OC_SideMismatch(address signer);

/**
 * @notice Two related parameters for batch operations did not match in length.
 */
error OC_BatchLengthMismatch();

/**
 * @notice Principal must be greater than 9999 Wei.
 *
 * @param principal                     Principal in ether.
 */
error OC_PrincipalTooLow(uint256 principal);

/**
 * @notice Signature must not be expired.
 *
 * @param deadline                      Deadline in seconds.
 */
error OC_SignatureIsExpired(uint256 deadline);

/**
 * @notice New currency does not match for a loan rollover request.
 *
 * @param oldCurrency                   The currency of the active loan.
 * @param newCurrency                   The currency of the new loan.
 */
error OC_RolloverCurrencyMismatch(address oldCurrency, address newCurrency);

/**
 * @notice New currency does not match for a loan rollover request.
 *
 * @param oldCollateralAddress          The address of the active loan's collateral.
 * @param newCollateralAddress          The token ID of the active loan's collateral.
 * @param oldCollateralId               The address of the new loan's collateral.
 * @param newCollateralId               The token ID of the new loan's collateral.
 */
error OC_RolloverCollateralMismatch(
    address oldCollateralAddress,
    uint256 oldCollateralId,
    address newCollateralAddress,
    uint256 newCollateralId
);

/**
 * @notice Provided payable currency address is not approved for lending.
 *
 * @param payableCurrency       ERC20 token address supplied in loan terms.
 */
error OC_InvalidCurrency(address payableCurrency);

/**
 * @notice Provided collateral address is not approved for lending.
 *
 * @param collateralAddress       ERC721 or ERC1155 token address supplied in loan terms.
 */
error OC_InvalidCollateral(address collateralAddress);

/**
 * @notice Provided token array does not hold any token addresses.
 */
error OC_ZeroArrayElements();

/**
 * @notice Provided token array holds more than 50 token addresses.
 */
error OC_ArrayTooManyElements();

// ==================================== ITEMS VERIFIER ======================================
/// @notice All errors prefixed with IV_, to separate from other contracts in the protocol.

/**
 * @notice The predicate payload was decoded successfully, but list of predicates is empty.
 */
error IV_NoPredicates();

/**
 * @notice Provided SignatureItem is missing an address.
 */
error IV_ItemMissingAddress();

/**
 * @notice Provided SignatureItem has an invalid collateral type.
 * @dev    Should never actually fire, since cType is defined by an enum, so will fail on decode.
 *
 * @param asset                        The NFT contract being checked.
 * @param cType                        The collateralTytpe provided.
 */
error IV_InvalidCollateralType(address asset, uint256 cType);

/**
 * @notice Provided signature item with no required amount. For single ERC721s, specify 1.
 *
 * @param asset                         The NFT contract being checked.
 * @param amount                        The amount provided (should be 0).
 */
error IV_NoAmount(address asset, uint256 amount);

/**
 * @notice Provided a wildcard for a non-ERC721.
 *
 * @param asset                         The NFT contract being checked.
 */
error IV_InvalidWildcard(address asset);

/**
 * @notice The provided token ID is out of bounds for the given collection.
 *
 * @param tokenId                       The token ID provided.
 */
error IV_InvalidTokenId(int256 tokenId);

/**
 * @notice The provided project ID does not exist on the target contract. Only
 *         used for ArtBlocks.
 *
 * @param projectId                     The project ID provided.
 * @param nextProjectId                 The contract's reported nextProjectId.
 */
error IV_InvalidProjectId(uint256 projectId, uint256 nextProjectId);

/**
 * @notice The provided collateralId converts to a vault, but
 *         the vault's address does not convert back to the provided collateralId
 *         when casted to a uint256.
 */
error IV_InvalidCollateralId(uint256 collateralId);

// ==================================== REPAYMENT CONTROLLER ======================================
/// @notice All errors prefixed with RC_, to separate from other contracts in the protocol.

/**
 * @notice Zero address passed in where not allowed.
 *
 * @param addressType                  The name of the parameter for which a zero address was provided.
 */
error RC_ZeroAddress(string addressType);

/**
 * @notice Could not dereference loan from loan ID.
 *
 * @param target                     The loanId being checked.
 */
error RC_CannotDereference(uint256 target);

/**
 * @notice Ensure valid loan state for loan lifceycle operations.
 *
 * @param state                         Current state of a loan according to LoanState enum.
 */
error RC_InvalidState(LoanLibrary.LoanState state);

/**
 * @notice Caller is not the owner of lender note.
 *
 * @param lender                     The owner of the lender note.
 * @param caller                     Msg.sender of the function call.
 */
error RC_OnlyLender(address lender, address caller);

// ==================================== Loan Core ======================================
/// @notice All errors prefixed with LC_, to separate from other contracts in the protocol.

/**
 * @notice Zero address passed in where not allowed.
 *
 * @param addressType                  The name of the parameter for which a zero address was provided.
 */
error LC_ZeroAddress(string addressType);

/// @notice Borrower address is same as lender address.
error LC_ReusedNote();

/// @notice Zero amount passed in where not allowed.
error LC_ZeroAmount();

/**
 * @notice Check collateral is not already used in a active loan.
 *
 * @param collateralAddress             Address of the collateral.
 * @param collateralId                  ID of the collateral token.
 */
error LC_CollateralInUse(address collateralAddress, uint256 collateralId);

/**
 * @notice The reported settlements are invalid, and LoanCore would lose tokens
 *         attempting to perform the requested operations.
 *
 *
 * @param payout                        Amount of tokens to be paid out.
 * @param collected                     Amount of tokens to collect - should be fewer than payout.
 */
error LC_CannotSettle(uint256 payout, uint256 collected);

/**
 * @notice User attempted to withdraw a pending balance that was in excess
 *         of what is available.
 *
 * @param amount                        Amount of tokens to be withdrawn.
 * @param available                     Amount of tokens available to withdraw.
 */
error LC_CannotWithdraw(uint256 amount, uint256 available);

/**
 * @notice Two arrays were provided that must be of matching length, but were not.
 *
 */
error LC_ArrayLengthMismatch();

/**
 * @notice A proposed affiliate split was submitted that is over the maximum.
 *
 * @param splitBps                     The proposed affiliate split.
 * @param maxSplitBps                  The maximum allowed affiliate split.
 *
 */
error LC_OverMaxSplit(uint96 splitBps, uint96 maxSplitBps);

/**
 * @notice Ensure valid loan state for loan lifceycle operations.
 *
 * @param state                         Current state of a loan according to LoanState enum.
 */
error LC_InvalidState(LoanLibrary.LoanState state);

/**
 * @notice Loan duration has not expired.
 *
 * @param dueDate                       Timestamp of the end of the loan duration.
 */
error LC_NotExpired(uint256 dueDate);

/**
 * @notice User address and the specified nonce have already been used.
 *
 * @param user                          Address of collateral owner.
 * @param nonce                         Represents the number of transactions sent by address.
 */
error LC_NonceUsed(address user, uint160 nonce);

/**
 * @notice Protocol attempted to set an affiliate code which already exists. Affiliate
 *         codes are immutable.
 *
 * @param affiliateCode                 The affiliate code being set.
 */
error LC_AffiliateCodeAlreadySet(bytes32 affiliateCode);

/**
 * @notice Specified note token ID does not have a redeemable receipt.
 *
 * @param loanId                     The loanId being checked.
 */
error LC_NoReceipt(uint256 loanId);

/**
 * @notice Only Loan Core contract can call this function.
 */
error LC_CallerNotLoanCore();

/**
 * @notice The loan core contract has been irreversibly shut down.
 */
error LC_Shutdown();

// ==================================== Promissory Note ======================================
/// @notice All errors prefixed with PN_, to separate from other contracts in the protocol.

/**
 * @notice Zero address passed in where not allowed.
 *
 * @param addressType                  The name of the parameter for which a zero address was provided.
 */
error PN_ZeroAddress(string addressType);

/**
 * @notice Caller of mint function must have the MINTER_ROLE in AccessControl.
 *
 * @param caller                        Address of the function caller.
 */
error PN_MintingRole(address caller);

/**
 * @notice Caller of burn function must have the BURNER_ROLE in AccessControl.
 *
 * @param caller                        Address of the function caller.
 */
error PN_BurningRole(address caller);

/**
 * @notice Non-existant token id provided as argument.
 *
 * @param tokenId                       The ID of the token to lookup the URI for.
 */
error PN_DoesNotExist(uint256 tokenId);

// ==================================== Fee Controller ======================================
/// @notice All errors prefixed with FC_, to separate from other contracts in the protocol.

/**
 * @notice Caller attempted to set a lending fee which is larger than the global maximum.
 */
error FC_LendingFeeOverMax(bytes32 selector, uint256 fee, uint256 maxFee);

/**
 * @notice Caller attempted to set a vault mint fee which is larger than the global maximum.
 */
error FC_VaultMintFeeOverMax(uint256 fee, uint256 maxFee);

// ==================================== ERC721 Permit ======================================
/// @notice All errors prefixed with ERC721P_, to separate from other contracts in the protocol.

/**
 * @notice Deadline for the permit has expired.
 *
 * @param deadline                      Permit deadline parameter as a timestamp.
 */
error ERC721P_DeadlineExpired(uint256 deadline);

/**
 * @notice Address of the owner to also be the owner of the tokenId.
 *
 * @param owner                        Owner parameter for the function call.
 */
error ERC721P_NotTokenOwner(address owner);

/**
 * @notice Invalid signature.
 *
 * @param signer                        Signer recovered from ECDSA sugnature hash.
 */
error ERC721P_InvalidSignature(address signer);

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

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

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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IAccessControl.sol";

/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerable is IAccessControl {
    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

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

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

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

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

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

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

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

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

        _revokeRole(role, account);
    }

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

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

    function _grantRole(bytes32 role, address account) private {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    function _revokeRole(bytes32 role, address account) private {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastvalue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastvalue;
                // Update the index for the moved value
                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC165.sol";

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

/**
 * @title LoanLibrary
 * @author Non-Fungible Technologies, Inc.
 *
 * Contains all data types used across Arcade lending contracts.
 */
library LoanLibrary {
    /**
     * @dev Enum describing the current state of a loan.
     * State change flow:
     * Created -> Active -> Repaid
     *                   -> Defaulted
     */
    enum LoanState {
        // We need a default that is not 'Created' - this is the zero value
        DUMMY_DO_NOT_USE,
        // The loan has been initialized, funds have been delivered to the borrower and the collateral is held.
        Active,
        // The loan has been repaid, and the collateral has been returned to the borrower. This is a terminal state.
        Repaid,
        // The loan was delinquent and collateral claimed by the lender. This is a terminal state.
        Defaulted
    }

    /**
     * @dev The raw terms of a loan.
     */
    struct LoanTerms {
        // Interest expressed as a rate, unlike V1 gross value.
        // Input conversion: 0.01% = (1 * 10**18) ,  10.00% = (1000 * 10**18)
        // This represents the rate over the lifetime of the loan, not APR.
        // 0.01% is the minimum interest rate allowed by the protocol.
        uint256 proratedInterestRate;
        /// @dev Full-slot variables
        // The amount of principal in terms of the payableCurrency.
        uint256 principal;
        // The token ID of the address holding the collateral.
        /// @dev Can be an AssetVault, or the NFT contract for unbundled collateral
        address collateralAddress;
        /// @dev Packed variables
        // The number of seconds representing relative due date of the loan.
        /// @dev Max is 94,608,000, fits in 96 bits
        uint96 durationSecs;
        // The token ID of the collateral.
        uint256 collateralId;
        // The payable currency for the loan principal and interest.
        address payableCurrency;
        // Timestamp for when signature for terms expires
        uint96 deadline;
        // Affiliate code used to start the loan.
        bytes32 affiliateCode;
    }

    /**
     * @dev Modification of loan terms, used for signing only.
     *      Instead of a collateralId, a list of predicates
     *      is defined by 'bytes' in items.
     */
    struct LoanTermsWithItems {
        // Interest expressed as a rate, unlike V1 gross value.
        // Input conversion: 0.01% = (1 * 10**18) ,  10.00% = (1000 * 10**18)
        // This represents the rate over the lifetime of the loan, not APR.
        // 0.01% is the minimum interest rate allowed by the protocol.
        uint256 proratedInterestRate;
        /// @dev Full-slot variables
        // The amount of principal in terms of the payableCurrency.
        uint256 principal;
        // The tokenID of the address holding the collateral
        address collateralAddress;
        /// @dev Packed variables
        // The number of seconds representing relative due date of the loan.
        /// @dev Max is 94,608,000, fits in 96 bits
        uint96 durationSecs;
        // An encoded list of predicates, along with their verifiers.
        bytes items;
        // The payable currency for the loan principal and interest.
        address payableCurrency;
        // Timestamp for when signature for terms expires
        uint96 deadline;
        // Affiliate code used to start the loan.
        bytes32 affiliateCode;
    }

    /**
     * @dev Predicate for item-based verifications
     */
    struct Predicate {
        // The encoded predicate, to decoded and parsed by the verifier contract.
        bytes data;
        // The verifier contract.
        address verifier;
    }

    /**
     * @dev Snapshot of lending fees at the time of loan creation.
     */
    struct FeeSnapshot {
        // The fee taken when lender claims defaulted collateral.
        uint16 lenderDefaultFee;
        // The fee taken from the borrower's interest repayment.
        uint16 lenderInterestFee;
        // The fee taken from the borrower's principal repayment.
        uint16 lenderPrincipalFee;
    }

    /**
     * @dev The data of a loan. This is stored once the loan is Active
     */
    struct LoanData {
        /// @dev Packed variables
        // The current state of the loan.
        LoanState state;
        // Start date of the loan, using block.timestamp.
        uint160 startDate;
        /// @dev Full-slot variables
        // The raw terms of the loan.
        LoanTerms terms;
        // Record of lending fees at the time of loan creation.
        FeeSnapshot feeSnapshot;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";

import "./INFTWithDescriptor.sol";

interface IPromissoryNote is INFTWithDescriptor, IERC721Enumerable {
    // ============== Token Operations ==============

    function mint(address to, uint256 loanId) external returns (uint256);

    function burn(uint256 tokenId) external;

    // ============== Initializer ==============

    function initialize(address loanCore) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

interface INFTWithDescriptor {
    // ============= Events ==============

    event SetDescriptor(address indexed caller, address indexed descriptor);

    // ================ Resource Metadata ================

    function tokenURI(uint256 tokenId) external view returns (string memory);

    function setDescriptor(address descriptor) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.18;

import "./INFTWithDescriptor.sol";

interface IVaultFactory is INFTWithDescriptor {
    // ============= Events ==============

    event VaultCreated(address vault, address to);
    event ClaimFees(address owner, uint256 amount);

    // ================ View Functions ================

    function isInstance(address instance) external view returns (bool validity);

    function instanceCount() external view returns (uint256);

    function instanceAt(uint256 tokenId) external view returns (address);

    function instanceAtIndex(uint256 index) external view returns (address);

    // ================ Factory Operations ================

    function initializeBundle(address to) external payable returns (uint256);
}

{
  "metadata": {
    "bytecodeHash": "none"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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LoanLibrary.LoanTerms","name":"loanTerms","type":"tuple"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"address","name":"lender","type":"address"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"sig","type":"tuple"},{"internalType":"uint160","name":"nonce","type":"uint160"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"collateralSig","type":"tuple"},{"internalType":"uint256","name":"permitDeadline","type":"uint256"},{"components":[{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"address","name":"verifier","type":"address"}],"internalType":"struct LoanLibrary.Predicate[]","name":"itemPredicates","type":"tuple[]"}],"name":"initializeLoanWithCollateralPermitAndItems","outputs":[{"internalType":"uint256","name":"loanId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"proratedInterestRate","type":"uint256"},{"internalType":"uint256","name":"principal","type":"uint256"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint96","name":"durationSecs","type":"uint96"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"address","name":"payableCurrency","type":"address"},{"internalType":"uint96","name":"deadline","type":"uint96"},{"internalType":"bytes32","name":"affiliateCode","type":"bytes32"}],"internalType":"struct LoanLibrary.LoanTerms","name":"loanTerms","type":"tuple"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"address","name":"lender","type":"address"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"sig","type":"tuple"},{"internalType":"uint160","name":"nonce","type":"uint160"},{"components":[{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"address","name":"verifier","type":"address"}],"internalType":"struct LoanLibrary.Predicate[]","name":"itemPredicates","type":"tuple[]"}],"name":"initializeLoanWithItems","outputs":[{"internalType":"uint256","name":"loanId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"isAllowedCollateral","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"isAllowedCurrency","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"verifier","type":"address"}],"name":"isAllowedVerifier","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"signer","type":"address"}],"name":"isApproved","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"sig","type":"tuple"},{"internalType":"bytes32","name":"sighash","type":"bytes32"}],"name":"isApprovedForContract","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"address","name":"signer","type":"address"}],"name":"isSelfOrApproved","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"proratedInterestRate","type":"uint256"},{"internalType":"uint256","name":"principal","type":"uint256"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint96","name":"durationSecs","type":"uint96"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"address","name":"payableCurrency","type":"address"},{"internalType":"uint96","name":"deadline","type":"uint96"},{"internalType":"bytes32","name":"affiliateCode","type":"bytes32"}],"internalType":"struct LoanLibrary.LoanTerms","name":"loanTerms","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"sig","type":"tuple"},{"internalType":"uint160","name":"nonce","type":"uint160"},{"internalType":"enum IOriginationController.Side","name":"side","type":"uint8"},{"internalType":"bytes32","name":"itemsHash","type":"bytes32"}],"name":"recoverItemsSignature","outputs":[{"internalType":"bytes32","name":"sighash","type":"bytes32"},{"internalType":"address","name":"signer","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"proratedInterestRate","type":"uint256"},{"internalType":"uint256","name":"principal","type":"uint256"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint96","name":"durationSecs","type":"uint96"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"address","name":"payableCurrency","type":"address"},{"internalType":"uint96","name":"deadline","type":"uint96"},{"internalType":"bytes32","name":"affiliateCode","type":"bytes32"}],"internalType":"struct LoanLibrary.LoanTerms","name":"loanTerms","type":"tuple"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"sig","type":"tuple"},{"internalType":"uint160","name":"nonce","type":"uint160"},{"internalType":"enum IOriginationController.Side","name":"side","type":"uint8"}],"name":"recoverTokenSignature","outputs":[{"internalType":"bytes32","name":"sighash","type":"bytes32"},{"internalType":"address","name":"signer","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"oldLoanId","type":"uint256"},{"components":[{"internalType":"uint256","name":"proratedInterestRate","type":"uint256"},{"internalType":"uint256","name":"principal","type":"uint256"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint96","name":"durationSecs","type":"uint96"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"address","name":"payableCurrency","type":"address"},{"internalType":"uint96","name":"deadline","type":"uint96"},{"internalType":"bytes32","name":"affiliateCode","type":"bytes32"}],"internalType":"struct LoanLibrary.LoanTerms","name":"loanTerms","type":"tuple"},{"internalType":"address","name":"lender","type":"address"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"sig","type":"tuple"},{"internalType":"uint160","name":"nonce","type":"uint160"}],"name":"rolloverLoan","outputs":[{"internalType":"uint256","name":"newLoanId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"oldLoanId","type":"uint256"},{"components":[{"internalType":"uint256","name":"proratedInterestRate","type":"uint256"},{"internalType":"uint256","name":"principal","type":"uint256"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint96","name":"durationSecs","type":"uint96"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"address","name":"payableCurrency","type":"address"},{"internalType":"uint96","name":"deadline","type":"uint96"},{"internalType":"bytes32","name":"affiliateCode","type":"bytes32"}],"internalType":"struct LoanLibrary.LoanTerms","name":"loanTerms","type":"tuple"},{"internalType":"address","name":"lender","type":"address"},{"components":[{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"bytes","name":"extraData","type":"bytes"}],"internalType":"struct IOriginationController.Signature","name":"sig","type":"tuple"},{"internalType":"uint160","name":"nonce","type":"uint160"},{"components":[{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"address","name":"verifier","type":"address"}],"internalType":"struct LoanLibrary.Predicate[]","name":"itemPredicates","type":"tuple[]"}],"name":"rolloverLoanWithItems","outputs":[{"internalType":"uint256","name":"newLoanId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"bool[]","name":"isAllowed","type":"bool[]"}],"name":"setAllowedCollateralAddresses","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"components":[{"internalType":"bool","name":"isAllowed","type":"bool"},{"internalType":"uint256","name":"minPrincipal","type":"uint256"}],"internalType":"struct IOriginationController.Currency[]","name":"currencyData","type":"tuple[]"}],"name":"setAllowedPayableCurrencies","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"verifiers","type":"address[]"},{"internalType":"bool[]","name":"isAllowed","type":"bool[]"}],"name":"setAllowedVerifiers","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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00000000000000000000000089bc08ba00f135d608bc335f6b33d7a9abcc98af000000000000000000000000f764442856eb3fe68a0828e07246a4b395e800fa

-----Decoded View---------------
Arg [0] : _loanCore (address): 0x89bc08BA00f135d608bc335f6B33D7a9ABCC98aF
Arg [1] : _feeController (address): 0xf764442856Eb3fe68A0828e07246a4B395e800fa

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000089bc08ba00f135d608bc335f6b33d7a9abcc98af
Arg [1] : 000000000000000000000000f764442856eb3fe68a0828e07246a4b395e800fa