fulfiller

minimumReceived

maximumSpent

context

generateOrder

offer

consideration

getSeaportMetadata

name

schemas

caller

previewOrder

orderHashes

contractNonce

ratifyOrder

ratifyOrderMagicValue

interfaceId

supportsInterface

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

import {ReceivedItem, Schema, SpentItem} from "../lib/ConsiderationStructs.sol";
import {IERC165} from "../interfaces/IERC165.sol";

/**
 * @title ContractOffererInterface
 * @notice Contains the minimum interfaces needed to interact with a contract
 *         offerer.
 */
interface ContractOffererInterface is IERC165 {
    /**
     * @dev Generates an order with the specified minimum and maximum spent
     *      items, and optional context (supplied as extraData).
     *
     * @param fulfiller       The address of the fulfiller.
     * @param minimumReceived The minimum items that the caller is willing to
     *                        receive.
     * @param maximumSpent    The maximum items the caller is willing to spend.
     * @param context         Additional context of the order.
     *
     * @return offer         A tuple containing the offer items.
     * @return consideration A tuple containing the consideration items.
     */
    function generateOrder(
        address fulfiller,
        SpentItem[] calldata minimumReceived,
        SpentItem[] calldata maximumSpent,
        bytes calldata context // encoded based on the schemaID
    ) external returns (SpentItem[] memory offer, ReceivedItem[] memory consideration);

    /**
     * @dev Ratifies an order with the specified offer, consideration, and
     *      optional context (supplied as extraData).
     *
     * @param offer         The offer items.
     * @param consideration The consideration items.
     * @param context       Additional context of the order.
     * @param orderHashes   The hashes to ratify.
     * @param contractNonce The nonce of the contract.
     *
     * @return ratifyOrderMagicValue The magic value returned by the contract
     *                               offerer.
     */
    function ratifyOrder(
        SpentItem[] calldata offer,
        ReceivedItem[] calldata consideration,
        bytes calldata context, // encoded based on the schemaID
        bytes32[] calldata orderHashes,
        uint256 contractNonce
    ) external returns (bytes4 ratifyOrderMagicValue);

    /**
     * @dev View function to preview an order generated in response to a minimum
     *      set of received items, maximum set of spent items, and context
     *      (supplied as extraData).
     *
     * @param caller          The address of the caller (e.g. Seaport).
     * @param fulfiller       The address of the fulfiller (e.g. the account
     *                        calling Seaport).
     * @param minimumReceived The minimum items that the caller is willing to
     *                        receive.
     * @param maximumSpent    The maximum items the caller is willing to spend.
     * @param context         Additional context of the order.
     *
     * @return offer         A tuple containing the offer items.
     * @return consideration A tuple containing the consideration items.
     */
    function previewOrder(
        address caller,
        address fulfiller,
        SpentItem[] calldata minimumReceived,
        SpentItem[] calldata maximumSpent,
        bytes calldata context // encoded based on the schemaID
    ) external view returns (SpentItem[] memory offer, ReceivedItem[] memory consideration);

    /**
     * @dev Gets the metadata for this contract offerer.
     *
     * @return name    The name of the contract offerer.
     * @return schemas The schemas supported by the contract offerer.
     */
    function getSeaportMetadata() external view returns (string memory name, Schema[] memory schemas); // map to Seaport Improvement Proposal IDs

    function supportsInterface(bytes4 interfaceId) external view override returns (bool);

    // Additional functions and/or events based on implemented schemaIDs
}


   The name of the contract offerer.

ContractOffererInterface

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.7;

/**
 * @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`.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}


// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

enum OrderType {
    // 0: no partial fills, anyone can execute
    FULL_OPEN,

    // 1: partial fills supported, anyone can execute
    PARTIAL_OPEN,

    // 2: no partial fills, only offerer or zone can execute
    FULL_RESTRICTED,

    // 3: partial fills supported, only offerer or zone can execute
    PARTIAL_RESTRICTED,

    // 4: contract order type
    CONTRACT
}

enum BasicOrderType {
    // 0: no partial fills, anyone can execute
    ETH_TO_ERC721_FULL_OPEN,

    // 1: partial fills supported, anyone can execute
    ETH_TO_ERC721_PARTIAL_OPEN,

    // 2: no partial fills, only offerer or zone can execute
    ETH_TO_ERC721_FULL_RESTRICTED,

    // 3: partial fills supported, only offerer or zone can execute
    ETH_TO_ERC721_PARTIAL_RESTRICTED,

    // 4: no partial fills, anyone can execute
    ETH_TO_ERC1155_FULL_OPEN,

    // 5: partial fills supported, anyone can execute
    ETH_TO_ERC1155_PARTIAL_OPEN,

    // 6: no partial fills, only offerer or zone can execute
    ETH_TO_ERC1155_FULL_RESTRICTED,

    // 7: partial fills supported, only offerer or zone can execute
    ETH_TO_ERC1155_PARTIAL_RESTRICTED,

    // 8: no partial fills, anyone can execute
    ERC20_TO_ERC721_FULL_OPEN,

    // 9: partial fills supported, anyone can execute
    ERC20_TO_ERC721_PARTIAL_OPEN,

    // 10: no partial fills, only offerer or zone can execute
    ERC20_TO_ERC721_FULL_RESTRICTED,

    // 11: partial fills supported, only offerer or zone can execute
    ERC20_TO_ERC721_PARTIAL_RESTRICTED,

    // 12: no partial fills, anyone can execute
    ERC20_TO_ERC1155_FULL_OPEN,

    // 13: partial fills supported, anyone can execute
    ERC20_TO_ERC1155_PARTIAL_OPEN,

    // 14: no partial fills, only offerer or zone can execute
    ERC20_TO_ERC1155_FULL_RESTRICTED,

    // 15: partial fills supported, only offerer or zone can execute
    ERC20_TO_ERC1155_PARTIAL_RESTRICTED,

    // 16: no partial fills, anyone can execute
    ERC721_TO_ERC20_FULL_OPEN,

    // 17: partial fills supported, anyone can execute
    ERC721_TO_ERC20_PARTIAL_OPEN,

    // 18: no partial fills, only offerer or zone can execute
    ERC721_TO_ERC20_FULL_RESTRICTED,

    // 19: partial fills supported, only offerer or zone can execute
    ERC721_TO_ERC20_PARTIAL_RESTRICTED,

    // 20: no partial fills, anyone can execute
    ERC1155_TO_ERC20_FULL_OPEN,

    // 21: partial fills supported, anyone can execute
    ERC1155_TO_ERC20_PARTIAL_OPEN,

    // 22: no partial fills, only offerer or zone can execute
    ERC1155_TO_ERC20_FULL_RESTRICTED,

    // 23: partial fills supported, only offerer or zone can execute
    ERC1155_TO_ERC20_PARTIAL_RESTRICTED
}

enum BasicOrderRouteType {
    // 0: provide Ether (or other native token) to receive offered ERC721 item.
    ETH_TO_ERC721,

    // 1: provide Ether (or other native token) to receive offered ERC1155 item.
    ETH_TO_ERC1155,

    // 2: provide ERC20 item to receive offered ERC721 item.
    ERC20_TO_ERC721,

    // 3: provide ERC20 item to receive offered ERC1155 item.
    ERC20_TO_ERC1155,

    // 4: provide ERC721 item to receive offered ERC20 item.
    ERC721_TO_ERC20,

    // 5: provide ERC1155 item to receive offered ERC20 item.
    ERC1155_TO_ERC20
}

enum ItemType {
    // 0: ETH on mainnet, MATIC on polygon, etc.
    NATIVE,

    // 1: ERC20 items (ERC777 and ERC20 analogues could also technically work)
    ERC20,

    // 2: ERC721 items
    ERC721,

    // 3: ERC1155 items
    ERC1155,

    // 4: ERC721 items where a number of tokenIds are supported
    ERC721_WITH_CRITERIA,

    // 5: ERC1155 items where a number of ids are supported
    ERC1155_WITH_CRITERIA
}

enum Side {
    // 0: Items that can be spent
    OFFER,

    // 1: Items that must be received
    CONSIDERATION
}


AlreadyInitialized

NewOwnerIsZeroAddress

NoHandoverRequest

Unauthorized

pendingOwner

OwnershipHandoverCanceled

OwnershipHandoverRequested

oldOwner

newOwner

OwnershipTransferred

cancelOwnershipHandover

completeOwnershipHandover

owner

result

ownershipHandoverExpiresAt

renounceOwnership

requestOwnershipHandover

transferOwnership

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Simple single owner authorization mixin.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/auth/Ownable.sol)
///
/// @dev Note:
/// This implementation does NOT auto-initialize the owner to `msg.sender`.
/// You MUST call the `_initializeOwner` in the constructor / initializer.
///
/// While the ownable portion follows
/// [EIP-173](https://eips.ethereum.org/EIPS/eip-173) for compatibility,
/// the nomenclature for the 2-step ownership handover may be unique to this codebase.
abstract contract Ownable {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The caller is not authorized to call the function.
    error Unauthorized();

    /// @dev The `newOwner` cannot be the zero address.
    error NewOwnerIsZeroAddress();

    /// @dev The `pendingOwner` does not have a valid handover request.
    error NoHandoverRequest();

    /// @dev Cannot double-initialize.
    error AlreadyInitialized();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                           EVENTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The ownership is transferred from `oldOwner` to `newOwner`.
    /// This event is intentionally kept the same as OpenZeppelin's Ownable to be
    /// compatible with indexers and [EIP-173](https://eips.ethereum.org/EIPS/eip-173),
    /// despite it not being as lightweight as a single argument event.
    event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);

    /// @dev An ownership handover to `pendingOwner` has been requested.
    event OwnershipHandoverRequested(address indexed pendingOwner);

    /// @dev The ownership handover to `pendingOwner` has been canceled.
    event OwnershipHandoverCanceled(address indexed pendingOwner);

    /// @dev `keccak256(bytes("OwnershipTransferred(address,address)"))`.
    uint256 private constant _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE =
        0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0;

    /// @dev `keccak256(bytes("OwnershipHandoverRequested(address)"))`.
    uint256 private constant _OWNERSHIP_HANDOVER_REQUESTED_EVENT_SIGNATURE =
        0xdbf36a107da19e49527a7176a1babf963b4b0ff8cde35ee35d6cd8f1f9ac7e1d;

    /// @dev `keccak256(bytes("OwnershipHandoverCanceled(address)"))`.
    uint256 private constant _OWNERSHIP_HANDOVER_CANCELED_EVENT_SIGNATURE =
        0xfa7b8eab7da67f412cc9575ed43464468f9bfbae89d1675917346ca6d8fe3c92;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STORAGE                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The owner slot is given by:
    /// `bytes32(~uint256(uint32(bytes4(keccak256("_OWNER_SLOT_NOT")))))`.
    /// It is intentionally chosen to be a high value
    /// to avoid collision with lower slots.
    /// The choice of manual storage layout is to enable compatibility
    /// with both regular and upgradeable contracts.
    bytes32 internal constant _OWNER_SLOT =
        0xffffffffffffffffffffffffffffffffffffffffffffffffffffffff74873927;

    /// The ownership handover slot of `newOwner` is given by:
    /// ```
    ///     mstore(0x00, or(shl(96, user), _HANDOVER_SLOT_SEED))
    ///     let handoverSlot := keccak256(0x00, 0x20)
    /// ```
    /// It stores the expiry timestamp of the two-step ownership handover.
    uint256 private constant _HANDOVER_SLOT_SEED = 0x389a75e1;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     INTERNAL FUNCTIONS                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Override to return true to make `_initializeOwner` prevent double-initialization.
    function _guardInitializeOwner() internal pure virtual returns (bool guard) {}

    /// @dev Initializes the owner directly without authorization guard.
    /// This function must be called upon initialization,
    /// regardless of whether the contract is upgradeable or not.
    /// This is to enable generalization to both regular and upgradeable contracts,
    /// and to save gas in case the initial owner is not the caller.
    /// For performance reasons, this function will not check if there
    /// is an existing owner.
    function _initializeOwner(address newOwner) internal virtual {
        if (_guardInitializeOwner()) {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                if sload(ownerSlot) {
                    mstore(0x00, 0x0dc149f0) // `AlreadyInitialized()`.
                    revert(0x1c, 0x04)
                }
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Store the new value.
                sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
            }
        } else {
            /// @solidity memory-safe-assembly
            assembly {
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Store the new value.
                sstore(_OWNER_SLOT, newOwner)
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, 0, newOwner)
            }
        }
    }

    /// @dev Sets the owner directly without authorization guard.
    function _setOwner(address newOwner) internal virtual {
        if (_guardInitializeOwner()) {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
                // Store the new value.
                sstore(ownerSlot, or(newOwner, shl(255, iszero(newOwner))))
            }
        } else {
            /// @solidity memory-safe-assembly
            assembly {
                let ownerSlot := _OWNER_SLOT
                // Clean the upper 96 bits.
                newOwner := shr(96, shl(96, newOwner))
                // Emit the {OwnershipTransferred} event.
                log3(0, 0, _OWNERSHIP_TRANSFERRED_EVENT_SIGNATURE, sload(ownerSlot), newOwner)
                // Store the new value.
                sstore(ownerSlot, newOwner)
            }
        }
    }

    /// @dev Throws if the sender is not the owner.
    function _checkOwner() internal view virtual {
        /// @solidity memory-safe-assembly
        assembly {
            // If the caller is not the stored owner, revert.
            if iszero(eq(caller(), sload(_OWNER_SLOT))) {
                mstore(0x00, 0x82b42900) // `Unauthorized()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Returns how long a two-step ownership handover is valid for in seconds.
    /// Override to return a different value if needed.
    /// Made internal to conserve bytecode. Wrap it in a public function if needed.
    function _ownershipHandoverValidFor() internal view virtual returns (uint64) {
        return 48 * 3600;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  PUBLIC UPDATE FUNCTIONS                   */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Allows the owner to transfer the ownership to `newOwner`.
    function transferOwnership(address newOwner) public payable virtual onlyOwner {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(shl(96, newOwner)) {
                mstore(0x00, 0x7448fbae) // `NewOwnerIsZeroAddress()`.
                revert(0x1c, 0x04)
            }
        }
        _setOwner(newOwner);
    }

    /// @dev Allows the owner to renounce their ownership.
    function renounceOwnership() public payable virtual onlyOwner {
        _setOwner(address(0));
    }

    /// @dev Request a two-step ownership handover to the caller.
    /// The request will automatically expire in 48 hours (172800 seconds) by default.
    function requestOwnershipHandover() public payable virtual {
        unchecked {
            uint256 expires = block.timestamp + _ownershipHandoverValidFor();
            /// @solidity memory-safe-assembly
            assembly {
                // Compute and set the handover slot to `expires`.
                mstore(0x0c, _HANDOVER_SLOT_SEED)
                mstore(0x00, caller())
                sstore(keccak256(0x0c, 0x20), expires)
                // Emit the {OwnershipHandoverRequested} event.
                log2(0, 0, _OWNERSHIP_HANDOVER_REQUESTED_EVENT_SIGNATURE, caller())
            }
        }
    }

    /// @dev Cancels the two-step ownership handover to the caller, if any.
    function cancelOwnershipHandover() public payable virtual {
        /// @solidity memory-safe-assembly
        assembly {
            // Compute and set the handover slot to 0.
            mstore(0x0c, _HANDOVER_SLOT_SEED)
            mstore(0x00, caller())
            sstore(keccak256(0x0c, 0x20), 0)
            // Emit the {OwnershipHandoverCanceled} event.
            log2(0, 0, _OWNERSHIP_HANDOVER_CANCELED_EVENT_SIGNATURE, caller())
        }
    }

    /// @dev Allows the owner to complete the two-step ownership handover to `pendingOwner`.
    /// Reverts if there is no existing ownership handover requested by `pendingOwner`.
    function completeOwnershipHandover(address pendingOwner) public payable virtual onlyOwner {
        /// @solidity memory-safe-assembly
        assembly {
            // Compute and set the handover slot to 0.
            mstore(0x0c, _HANDOVER_SLOT_SEED)
            mstore(0x00, pendingOwner)
            let handoverSlot := keccak256(0x0c, 0x20)
            // If the handover does not exist, or has expired.
            if gt(timestamp(), sload(handoverSlot)) {
                mstore(0x00, 0x6f5e8818) // `NoHandoverRequest()`.
                revert(0x1c, 0x04)
            }
            // Set the handover slot to 0.
            sstore(handoverSlot, 0)
        }
        _setOwner(pendingOwner);
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                   PUBLIC READ FUNCTIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Returns the owner of the contract.
    function owner() public view virtual returns (address result) {
        /// @solidity memory-safe-assembly
        assembly {
            result := sload(_OWNER_SLOT)
        }
    }

    /// @dev Returns the expiry timestamp for the two-step ownership handover to `pendingOwner`.
    function ownershipHandoverExpiresAt(address pendingOwner)
        public
        view
        virtual
        returns (uint256 result)
    {
        /// @solidity memory-safe-assembly
        assembly {
            // Compute the handover slot.
            mstore(0x0c, _HANDOVER_SLOT_SEED)
            mstore(0x00, pendingOwner)
            // Load the handover slot.
            result := sload(keccak256(0x0c, 0x20))
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         MODIFIERS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Marks a function as only callable by the owner.
    modifier onlyOwner() virtual {
        _checkOwner();
        _;
    }
}


AccountBalanceOverflow

ArrayLengthsMismatch

InsufficientBalance

NotOwnerNorApproved

TransferToNonERC1155ReceiverImplementer

TransferToZeroAddress

operator

isApproved

ApprovalForAll

from

amounts

TransferBatch

amount

TransferSingle

value

balanceOf

owners

balanceOfBatch

balances

isApprovedForAll

data

safeBatchTransferFrom

safeTransferFrom

setApprovalForAll

AllowanceOverflow

AllowanceUnderflow

InsufficientAllowance

InvalidPermit

PermitExpired

TotalSupplyOverflow

spender

Approval

Transfer

DOMAIN_SEPARATOR

allowance

approve

decimals

nonces

deadline

permit

symbol

totalSupply

transfer

transferFrom

BalanceQueryForZeroAddress

TokenAlreadyExists

TokenDoesNotExist

TransferFromIncorrectOwner

TransferToNonERC721ReceiverImplementer

account

getApproved

ownerOf

tokenURI

DivFailed

DivWadFailed

ExpOverflow

FactorialOverflow

FullMulDivFailed

LnWadUndefined

MantissaOverflow

MulDivFailed

MulWadFailed

OutOfDomain

RPowOverflow

SDivWadFailed

SMulWadFailed

HexLengthInsufficient

TooBigForSmallString

ApproveFailed

ETHTransferFailed

TransferFailed

TransferFromFailed

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/SafeTransferLib.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
///
/// @dev Note:
/// - For ETH transfers, please use `forceSafeTransferETH` for DoS protection.
/// - For ERC20s, this implementation won't check that a token has code,
///   responsibility is delegated to the caller.
library SafeTransferLib {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev The ETH transfer has failed.
    error ETHTransferFailed();

    /// @dev The ERC20 `transferFrom` has failed.
    error TransferFromFailed();

    /// @dev The ERC20 `transfer` has failed.
    error TransferFailed();

    /// @dev The ERC20 `approve` has failed.
    error ApproveFailed();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                         CONSTANTS                          */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Suggested gas stipend for contract receiving ETH that disallows any storage writes.
    uint256 internal constant GAS_STIPEND_NO_STORAGE_WRITES = 2300;

    /// @dev Suggested gas stipend for contract receiving ETH to perform a few
    /// storage reads and writes, but low enough to prevent griefing.
    uint256 internal constant GAS_STIPEND_NO_GRIEF = 100000;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       ETH OPERATIONS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    // If the ETH transfer MUST succeed with a reasonable gas budget, use the force variants.
    //
    // The regular variants:
    // - Forwards all remaining gas to the target.
    // - Reverts if the target reverts.
    // - Reverts if the current contract has insufficient balance.
    //
    // The force variants:
    // - Forwards with an optional gas stipend
    //   (defaults to `GAS_STIPEND_NO_GRIEF`, which is sufficient for most cases).
    // - If the target reverts, or if the gas stipend is exhausted,
    //   creates a temporary contract to force send the ETH via `SELFDESTRUCT`.
    //   Future compatible with `SENDALL`: https://eips.ethereum.org/EIPS/eip-4758.
    // - Reverts if the current contract has insufficient balance.
    //
    // The try variants:
    // - Forwards with a mandatory gas stipend.
    // - Instead of reverting, returns whether the transfer succeeded.

    /// @dev Sends `amount` (in wei) ETH to `to`.
    function safeTransferETH(address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(call(gas(), to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Sends all the ETH in the current contract to `to`.
    function safeTransferAllETH(address to) internal {
        /// @solidity memory-safe-assembly
        assembly {
            // Transfer all the ETH and check if it succeeded or not.
            if iszero(call(gas(), to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
        }
    }

    /// @dev Force sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
    function forceSafeTransferETH(address to, uint256 amount, uint256 gasStipend) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if lt(selfbalance(), amount) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
            if iszero(call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends all the ETH in the current contract to `to`, with a `gasStipend`.
    function forceSafeTransferAllETH(address to, uint256 gasStipend) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if iszero(call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends `amount` (in wei) ETH to `to`, with `GAS_STIPEND_NO_GRIEF`.
    function forceSafeTransferETH(address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            if lt(selfbalance(), amount) {
                mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
                revert(0x1c, 0x04)
            }
            if iszero(call(GAS_STIPEND_NO_GRIEF, to, amount, codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Force sends all the ETH in the current contract to `to`, with `GAS_STIPEND_NO_GRIEF`.
    function forceSafeTransferAllETH(address to) internal {
        /// @solidity memory-safe-assembly
        assembly {
            // forgefmt: disable-next-item
            if iszero(call(GAS_STIPEND_NO_GRIEF, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
                mstore(0x00, to) // Store the address in scratch space.
                mstore8(0x0b, 0x73) // Opcode `PUSH20`.
                mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
                if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
            }
        }
    }

    /// @dev Sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
    function trySafeTransferETH(address to, uint256 amount, uint256 gasStipend)
        internal
        returns (bool success)
    {
        /// @solidity memory-safe-assembly
        assembly {
            success := call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)
        }
    }

    /// @dev Sends all the ETH in the current contract to `to`, with a `gasStipend`.
    function trySafeTransferAllETH(address to, uint256 gasStipend)
        internal
        returns (bool success)
    {
        /// @solidity memory-safe-assembly
        assembly {
            success := call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)
        }
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      ERC20 OPERATIONS                      */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /// @dev Sends `amount` of ERC20 `token` from `from` to `to`.
    /// Reverts upon failure.
    ///
    /// The `from` account must have at least `amount` approved for
    /// the current contract to manage.
    function safeTransferFrom(address token, address from, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x60, amount) // Store the `amount` argument.
            mstore(0x40, to) // Store the `to` argument.
            mstore(0x2c, shl(96, from)) // Store the `from` argument.
            mstore(0x0c, 0x23b872dd000000000000000000000000) // `transferFrom(address,address,uint256)`.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot to zero.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }

    /// @dev Sends all of ERC20 `token` from `from` to `to`.
    /// Reverts upon failure.
    ///
    /// The `from` account must have their entire balance approved for
    /// the current contract to manage.
    function safeTransferAllFrom(address token, address from, address to)
        internal
        returns (uint256 amount)
    {
        /// @solidity memory-safe-assembly
        assembly {
            let m := mload(0x40) // Cache the free memory pointer.
            mstore(0x40, to) // Store the `to` argument.
            mstore(0x2c, shl(96, from)) // Store the `from` argument.
            mstore(0x0c, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
            // Read the balance, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                    staticcall(gas(), token, 0x1c, 0x24, 0x60, 0x20)
                )
            ) {
                mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x00, 0x23b872dd) // `transferFrom(address,address,uint256)`.
            amount := mload(0x60) // The `amount` is already at 0x60. We'll need to return it.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x60, 0) // Restore the zero slot to zero.
            mstore(0x40, m) // Restore the free memory pointer.
        }
    }

    /// @dev Sends `amount` of ERC20 `token` from the current contract to `to`.
    /// Reverts upon failure.
    function safeTransfer(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sends all of ERC20 `token` from the current contract to `to`.
    /// Reverts upon failure.
    function safeTransferAll(address token, address to) internal returns (uint256 amount) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, 0x70a08231) // Store the function selector of `balanceOf(address)`.
            mstore(0x20, address()) // Store the address of the current contract.
            // Read the balance, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                    staticcall(gas(), token, 0x1c, 0x24, 0x34, 0x20)
                )
            ) {
                mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x14, to) // Store the `to` argument.
            amount := mload(0x34) // The `amount` is already at 0x34. We'll need to return it.
            mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
            // Perform the transfer, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
    /// Reverts upon failure.
    function safeApprove(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
            // Perform the approval, reverting upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
                revert(0x1c, 0x04)
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
    /// If the initial attempt to approve fails, attempts to reset the approved amount to zero,
    /// then retries the approval again (some tokens, e.g. USDT, requires this).
    /// Reverts upon failure.
    function safeApproveWithRetry(address token, address to, uint256 amount) internal {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, to) // Store the `to` argument.
            mstore(0x34, amount) // Store the `amount` argument.
            mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
            // Perform the approval, retrying upon failure.
            if iszero(
                and( // The arguments of `and` are evaluated from right to left.
                    or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                    call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                )
            ) {
                mstore(0x34, 0) // Store 0 for the `amount`.
                mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
                pop(call(gas(), token, 0, 0x10, 0x44, codesize(), 0x00)) // Reset the approval.
                mstore(0x34, amount) // Store back the original `amount`.
                // Retry the approval, reverting upon failure.
                if iszero(
                    and(
                        or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
                        call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
                    )
                ) {
                    mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
                    revert(0x1c, 0x04)
                }
            }
            mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
        }
    }

    /// @dev Returns the amount of ERC20 `token` owned by `account`.
    /// Returns zero if the `token` does not exist.
    function balanceOf(address token, address account) internal view returns (uint256 amount) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x14, account) // Store the `account` argument.
            mstore(0x00, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
            amount :=
                mul(
                    mload(0x20),
                    and( // The arguments of `and` are evaluated from right to left.
                        gt(returndatasize(), 0x1f), // At least 32 bytes returned.
                        staticcall(gas(), token, 0x10, 0x24, 0x20, 0x20)
                    )
                )
        }
    }
}


seaport_

CustodianCannotBeAuthorized

ImplementInChild

InvalidAction

InvalidFulfiller

InvalidLoan

InvalidPostRepayment

InvalidPostSettlement

InvalidRepayer

NotAuthorized

NotEnteredViaSeaport

NotSeaport

NotStarport

SeaportCompatibleContractDeployed

loan

custody

selector

getBorrower

mint

approvedTo

mintWithApprovalSet

onERC1155Received

seaport

loanId

The `Custodian` contract is an ERC721 token representing custody of loans from the `Starport` lending platform. It integrates with Seaport for loan settlement and repayment, allowing actions like minting custody tokens, approving asset transfers, and handling post-settlement and repayment logic. It also provides metadata for Seaport interactions.

solution

caveatData

validate

// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

import {Starport} from "../Starport.sol";
import {AdditionalTransfer} from "../lib/StarportLib.sol";

abstract contract CaveatEnforcer {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STRUCTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    struct Caveat {
        address enforcer;
        bytes data;
    }

    struct SignedCaveats {
        bool singleUse;
        uint256 deadline;
        bytes32 salt;
        Caveat[] caveats;
        bytes signature;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     FUNCTION OVERRIDES                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /**
     * @dev Enforces that the loan terms are identical except for the issuer
     * @param solution The additional transfers to be made
     * @param loan The loan terms
     * @param caveatData The borrowers encoded details
     */
    function validate(AdditionalTransfer[] calldata solution, Starport.Loan calldata loan, bytes calldata caveatData)
        public
        view
        virtual
        returns (bytes4);
}


onERC1155BatchReceived

tokenId

onERC721Received

// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

interface TokenReceiverInterface {
    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data)
        external
        returns (bytes4);

    function onERC1155Received(address, address, uint256, uint256, bytes calldata) external returns (bytes4);

    function onERC1155BatchReceived(address, address, uint256[] calldata, uint256[] calldata, bytes calldata)
        external
        returns (bytes4);
}


IsLocked

IsPaused

NotPaused

Paused

Unpaused

pause

paused

unpause

// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

import {Ownable} from "lib/solady/src/auth/Ownable.sol";

abstract contract PausableNonReentrant is Ownable {
    uint256 private constant _UNLOCKED = 0x1;
    uint256 private constant _LOCKED = 0x2;
    uint256 private constant _PAUSED = 0x3;

    uint256 private _state = _UNLOCKED;

    event Paused();
    event Unpaused();

    error IsPaused();
    error IsLocked();
    error NotPaused();

    /*
    * @dev modifier to ensure that the contract is not paused or locked
    */
    modifier pausableNonReentrant() {
        assembly ("memory-safe") {
            //If locked or paused, handle revert cases
            if gt(sload(_state.slot), _UNLOCKED) {
                if gt(sload(_state.slot), _LOCKED) {
                    //Revert IsPaused
                    mstore(0, 0x1309a563)
                    revert(0x1c, 0x04)
                }
                //Revert IsLocked
                mstore(0, 0xcaa30f55)
                revert(0x1c, 0x04)
            }
            sstore(_state.slot, _LOCKED)
        }
        _;
        assembly ("memory-safe") {
            sstore(_state.slot, _UNLOCKED)
        }
    }

    /*
    * @dev Pause the contract if not paused or locked
    */
    function pause() external onlyOwner {
        assembly ("memory-safe") {
            //If locked, prevent owner from overriding state
            if eq(sload(_state.slot), _LOCKED) {
                //Revert IsLocked
                mstore(0, 0xcaa30f55)
                revert(0x1c, 0x04)
            }
            sstore(_state.slot, _PAUSED)
        }
        emit Paused();
    }

    /*
    * @dev unpause the contract if not paused or locked
    */
    function unpause() external onlyOwner {
        assembly ("memory-safe") {
            //If not paused, prevent owner from overriding state
            if lt(sload(_state.slot), _PAUSED) {
                //Revert NotPaused
                mstore(0, 0x6cd60201)
                revert(0x1c, 0x04)
            }
            sstore(_state.slot, _UNLOCKED)
        }
        emit Unpaused();
    }

    /*
    * @dev helper to determine if the contract is paused
    * @return bool True if the contract is paused, false otherwise
    */
    function paused() external view returns (bool) {
        return _state == _PAUSED;
    }
}


InvalidItemAmount

InvalidItemIdentifier

InvalidItemTokenNoCode

InvalidItemType

InvalidSalt

InvalidTransferLength

NativeAssetsNotSupported

delta_t

rate

calculateSimpleInterest

// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

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

import {ItemType, ReceivedItem, SpentItem} from "lib/seaport/lib/seaport-types/src/lib/ConsiderationStructs.sol";

import {ERC721} from "lib/solady/src/tokens/ERC721.sol";
import {ERC20} from "lib/solady/src/tokens/ERC20.sol";
import {ERC1155} from "lib/solady/src/tokens/ERC1155.sol";
import {SafeTransferLib} from "lib/solady/src/utils/SafeTransferLib.sol";
import {FixedPointMathLib} from "lib/solady/src/utils/FixedPointMathLib.sol";

/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/*                          LIB ENUMS                         */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

enum Actions {
    Nothing,
    Repayment,
    Settlement
}

/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/*                         LIB STRUCTS                        */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

struct AdditionalTransfer {
    ItemType itemType;
    address token;
    address from;
    address to;
    uint256 identifier;
    uint256 amount;
}

library StarportLib {
    using FixedPointMathLib for uint256;
    using FixedPointMathLib for int256;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    error InvalidSalt();
    error InvalidItemAmount();
    error NativeAssetsNotSupported();
    error InvalidItemTokenNoCode();
    error InvalidItemIdentifier(); // Must be zero for ERC20's
    error InvalidItemType();
    error InvalidTransferLength();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  CONSTANTS AND IMMUTABLES                  */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    uint256 internal constant _INVALID_SALT = 0x81e69d9b00000000000000000000000000000000000000000000000000000000;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     PUBLIC FUNCTIONS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    function calculateSimpleInterest(uint256 delta_t, uint256 amount, uint256 rate, uint256 decimals)
        public
        pure
        returns (uint256)
    {
        return (((delta_t * rate) * amount) / 10 ** decimals) / 365 days;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                    INTERNAL FUNCTIONS                      */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    function getId(Starport.Loan memory loan) internal pure returns (uint256 loanId) {
        loanId = uint256(keccak256(abi.encode(loan)));
    }

    function validateSalt(
        mapping(address => mapping(bytes32 => bool)) storage usedSalts,
        address validator,
        bytes32 salt
    ) internal {
        assembly ("memory-safe") {
            mstore(0x0, validator)
            mstore(0x20, usedSalts.slot)

            // usedSalts[borrower]
            mstore(0x20, keccak256(0x0, 0x40))
            mstore(0x0, salt)

            // usedSalts[borrower][salt]
            let loc := keccak256(0x0, 0x40)

            // if (usedSalts[borrower][salt] == true)
            if iszero(iszero(sload(loc))) {
                // revert InvalidSalt()
                mstore(0x0, _INVALID_SALT)
                revert(0x0, 0x04)
            }

            sstore(loc, 1)
        }
    }

    /**
     * @dev Merges an array of SpentItems into ReceivedItems
     * @param payment The SpentItem[] for payment
     * @param paymentRecipient The recipient address of the payment
     * @param carry The SpentItem[] for carry
     * @param carryRecipient The recipient address of the carry
     * @return consideration An array of ReceivedItems
     */
    function mergeSpentItemsToReceivedItems(
        SpentItem[] memory payment,
        address paymentRecipient,
        SpentItem[] memory carry,
        address carryRecipient
    ) internal pure returns (ReceivedItem[] memory consideration) {
        consideration = new ReceivedItem[](payment.length + carry.length);

        uint256 i = 0;
        uint256 j = 0;
        for (; i < payment.length;) {
            if (payment[i].amount > 0) {
                SpentItem memory paymentItem = payment[i];
                consideration[j] = ReceivedItem({
                    itemType: paymentItem.itemType,
                    identifier: paymentItem.identifier,
                    amount: paymentItem.amount,
                    token: paymentItem.token,
                    recipient: payable(paymentRecipient)
                });

                unchecked {
                    ++j;
                }
            }
            unchecked {
                ++i;
            }
        }

        if (carry.length > 0) {
            i = 0;
            for (; i < carry.length;) {
                if (carry[i].amount > 0) {
                    SpentItem memory carryItem = carry[i];
                    consideration[j] = ReceivedItem({
                        itemType: carryItem.itemType,
                        identifier: carryItem.identifier,
                        amount: carryItem.amount,
                        token: carryItem.token,
                        recipient: payable(carryRecipient)
                    });

                    unchecked {
                        ++j;
                    }
                }
                unchecked {
                    ++i;
                }
            }
        }

        assembly ("memory-safe") {
            mstore(consideration, j)
        }
    }

    /**
     * @dev Removes ReceivedItems with zero amounts
     * @param consideration The ReceivedItem[] for payment
     * @return newConsideration An array of ReceivedItems with zero amounts removed
     */
    function removeZeroAmountItems(ReceivedItem[] memory consideration)
        internal
        pure
        returns (ReceivedItem[] memory newConsideration)
    {
        uint256 j = 0;
        newConsideration = new ReceivedItem[](consideration.length);
        for (uint256 i = 0; i < consideration.length;) {
            if (consideration[i].amount > 0) {
                ReceivedItem memory considerationItem = consideration[i];
                newConsideration[j] = ReceivedItem({
                    itemType: considerationItem.itemType,
                    identifier: considerationItem.identifier,
                    amount: considerationItem.amount,
                    token: considerationItem.token,
                    recipient: considerationItem.recipient
                });

                unchecked {
                    ++j;
                }
            }
            unchecked {
                ++i;
            }
        }
        assembly ("memory-safe") {
            mstore(newConsideration, j)
        }
    }

    function transferAdditionalTransfersCalldata(AdditionalTransfer[] calldata transfers) internal {
        uint256 i = 0;
        for (; i < transfers.length;) {
            AdditionalTransfer calldata transfer = transfers[i];
            if (transfer.token.code.length == 0) {
                revert InvalidItemTokenNoCode();
            }
            if (transfer.itemType == ItemType.ERC20) {
                // erc20 transfer
                if (transfer.amount > 0) {
                    SafeTransferLib.safeTransferFrom(transfer.token, transfer.from, transfer.to, transfer.amount);
                }
            } else if (transfer.itemType == ItemType.ERC721) {
                // erc721 transfer
                ERC721(transfer.token).transferFrom(transfer.from, transfer.to, transfer.identifier);
            } else if (transfers[i].itemType == ItemType.ERC1155) {
                // erc1155 transfer
                if (transfer.amount > 0) {
                    ERC1155(transfer.token).safeTransferFrom(
                        transfer.from, transfer.to, transfer.identifier, transfer.amount, ""
                    );
                }
            } else {
                revert NativeAssetsNotSupported();
            }
            unchecked {
                ++i;
            }
        }
    }

    function transferAdditionalTransfers(AdditionalTransfer[] memory transfers) internal {
        uint256 i = 0;
        for (; i < transfers.length;) {
            AdditionalTransfer memory transfer = transfers[i];
            if (transfer.token.code.length == 0) {
                revert InvalidItemTokenNoCode();
            }
            if (transfer.itemType == ItemType.ERC20) {
                // erc20 transfer
                if (transfer.amount > 0) {
                    SafeTransferLib.safeTransferFrom(transfer.token, transfer.from, transfer.to, transfer.amount);
                }
            } else if (transfer.itemType == ItemType.ERC721) {
                // erc721 transfer
                ERC721(transfer.token).transferFrom(transfer.from, transfer.to, transfer.identifier);
            } else if (transfer.itemType == ItemType.ERC1155) {
                // erc1155 transfer
                if (transfer.amount > 0) {
                    ERC1155(transfer.token).safeTransferFrom(
                        transfer.from, transfer.to, transfer.identifier, transfer.amount, ""
                    );
                }
            } else {
                revert NativeAssetsNotSupported();
            }
            unchecked {
                ++i;
            }
        }
    }

    function transferSpentItems(SpentItem[] memory transfers, address from, address to, bool safe) internal {
        if (transfers.length > 0) {
            uint256 i = 0;
            for (; i < transfers.length;) {
                SpentItem memory transfer = transfers[i];
                _transferItem(transfer.itemType, transfer.token, transfer.identifier, transfer.amount, from, to, safe);
                unchecked {
                    ++i;
                }
            }
        } else {
            revert InvalidTransferLength();
        }
    }

    function transferSpentItemsSelf(SpentItem[] memory transfers, address to) internal {
        if (transfers.length > 0) {
            uint256 i = 0;
            for (; i < transfers.length;) {
                SpentItem memory transfer = transfers[i];
                _transferItem(
                    transfer.itemType, transfer.token, transfer.identifier, transfer.amount, address(this), to
                );
                unchecked {
                    ++i;
                }
            }
        } else {
            revert InvalidTransferLength();
        }
    }

    function _transferItem(
        ItemType itemType,
        address token,
        uint256 identifier,
        uint256 amount,
        address from,
        address to,
        bool safe
    ) internal {
        if (token.code.length == 0) {
            revert InvalidItemTokenNoCode();
        }
        if (itemType == ItemType.ERC20) {
            if (identifier > 0 && safe) {
                revert InvalidItemIdentifier();
            }
            if (amount == 0 && safe) {
                revert InvalidItemAmount();
            }
            SafeTransferLib.safeTransferFrom(token, from, to, amount);
        } else if (itemType == ItemType.ERC721) {
            if (amount != 1 && safe) {
                revert InvalidItemAmount();
            }
            // erc721 transfer
            ERC721(token).transferFrom(from, to, identifier);
        } else if (itemType == ItemType.ERC1155) {
            if (amount == 0 && safe) {
                revert InvalidItemAmount();
            }
            // erc1155 transfer
            ERC1155(token).safeTransferFrom(from, to, identifier, amount, "");
        } else {
            revert InvalidItemType();
        }
    }

    function _transferItem(
        ItemType itemType,
        address token,
        uint256 identifier,
        uint256 amount,
        address from,
        address to
    ) internal {
        if (token.code.length == 0) {
            revert InvalidItemTokenNoCode();
        }
        if (itemType == ItemType.ERC20) {
            SafeTransferLib.safeTransfer(token, to, amount);
        } else if (itemType == ItemType.ERC721) {
            // erc721 transfer
            ERC721(token).transferFrom(from, to, identifier);
        } else if (itemType == ItemType.ERC1155) {
            // erc1155 transfer
            ERC1155(token).safeTransferFrom(from, to, identifier, amount, "");
        } else {
            revert InvalidItemType();
        }
    }
}


// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

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

abstract contract Validation {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      EXTERNAL FUNCTIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /*
    * @dev Validates the loan against the module
    * @param loan The loan to validate
    * @return bytes4 The validation result
    */
    function validate(Starport.Loan calldata) external view virtual returns (bytes4);
}


params

originate

// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

import {Starport} from "../Starport.sol";
import {CaveatEnforcer} from "../enforcers/CaveatEnforcer.sol";

import {SpentItem} from "lib/seaport/lib/seaport-types/src/lib/ConsiderationStructs.sol";

abstract contract Originator {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                          STRUCTS                           */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
    struct Request {
        address borrower;
        CaveatEnforcer.SignedCaveats borrowerCaveat;
        SpentItem[] collateral;
        SpentItem[] debt;
        bytes details;
        bytes approval;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      EXTERNAL FUNCTIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /**
     * @dev Accepts a request with signed data that is decoded by the originator
     * communicates with Starport to originate a loan
     * @param params          The request for the origination
     */
    function originate(Request calldata params) external virtual;
}


InvalidRefinance

getPaymentConsideration

newPricingData

getRefinanceConsideration

// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

import {Starport} from "../Starport.sol";
import {AdditionalTransfer} from "../lib/StarportLib.sol";
import {Validation} from "../lib/Validation.sol";

import {SpentItem} from "lib/seaport/lib/seaport-types/src/lib/ConsiderationStructs.sol";

abstract contract Pricing is Validation {
    Starport public immutable SP;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                       CUSTOM ERRORS                        */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    error InvalidRefinance();

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        CONSTRUCTOR                         */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    constructor(Starport SP_) {
        SP = SP_;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     PUBLIC FUNCTIONS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /**
     * @dev computes the payment details for a loan
     * @param loan The loan to compute the payment details for
     */
    function getPaymentConsideration(Starport.Loan calldata loan)
        public
        view
        virtual
        returns (SpentItem[] memory, SpentItem[] memory);

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      EXTERNAL FUNCTIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /**
     * @dev computes the refinance details for a loan
     * @param loan The loan to compute the payment details for
     * @param newPricingData The new pricing data being offered
     * @param fulfiller The address of the fulfiller
     */
    function getRefinanceConsideration(Starport.Loan calldata loan, bytes calldata newPricingData, address fulfiller)
        external
        view
        virtual
        returns (SpentItem[] memory, SpentItem[] memory, AdditionalTransfer[] memory);
}


getSettlementConsideration

authorized

postRepayment

postSettlement

// SPDX-License-Identifier: BUSL-1.1
//
//                       ↑↑↑↑                 ↑↑
//                       ↑↑↑↑                ↑↑↑↑↑
//                       ↑↑↑↑              ↑   ↑
//                       ↑↑↑↑            ↑↑↑↑↑
//            ↑          ↑↑↑↑          ↑   ↑
//          ↑↑↑↑↑        ↑↑↑↑        ↑↑↑↑↑
//            ↑↑↑↑↑      ↑↑↑↑      ↑↑↑↑↑                                   ↑↑↑                                                                      ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑↑                          ↑↑↑        ↑↑↑         ↑↑↑            ↑↑         ↑↑            ↑↑↑            ↑↑    ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                           ↑↑     ↑↑↑    ↑↑↑     ↑↑↑     ↑↑↑    ↑↑↑      ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑↑       ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑    ↑↑↑    ↑↑↑     ↑↑↑    ↑↑↑↑    ↑↑       ↑↑↑↑↑  ↑↑↑↑     ↑↑↑↑   ↑↑↑    ↑↑↑        ↑↑↑
//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
//                ↑      ↑↑↑↑     ↑↑↑↑↑
//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
//                       ↑↑↑↑         ↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑
//                       ↑↑↑↑

pragma solidity ^0.8.17;

import {Starport} from "../Starport.sol";
import {Validation} from "../lib/Validation.sol";

import {ReceivedItem} from "lib/seaport/lib/seaport-types/src/lib/ConsiderationStructs.sol";

abstract contract Settlement is Validation {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                  CONSTANTS AND IMMUTABLES                  */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    Starport public immutable SP;

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                        CONSTRUCTOR                         */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    constructor(Starport SP_) {
        SP = SP_;
    }

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      EXTERNAL FUNCTIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /*
    * @dev Called by the Custodian after a loan has been settled
    * @param loan The loan that has been settled
    * @param fulfiller The address of the fulfiller
    */
    function postSettlement(Starport.Loan calldata loan, address fulfiller) external virtual returns (bytes4);

    /*
    * @dev Called by the Starport/Custodian after a loan has been repaid
    * @param loan The loan that has been settled
    * @param fulfiller The address of the fulfiller
    */
    function postRepayment(Starport.Loan calldata loan, address fulfiller) external virtual returns (bytes4);

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     PUBLIC FUNCTIONS                       */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /*
    * @dev helper to get the consideration for a loan
    * @param loan The loan in question
    * @return consideration The settlement consideration for the loan
    * @return address The address of the authorized party (if any)
    */
    function getSettlementConsideration(Starport.Loan calldata loan)
        public
        view
        virtual
        returns (ReceivedItem[] memory consideration, address authorized);

    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                     FUNCTION OVERRIDES                     */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /*
    * @dev standard erc1155 received hook
    */
    function onERC1155Received(address, address, uint256, uint256, bytes calldata) external view returns (bytes4) {
        return this.onERC1155Received.selector;
    }
}


getOwner

The Starport contract facilitates the origination, refinancing, and settlement of collateralized loans. It supports custom terms, fee collection, and enforces caveats (conditions) through EIP-712 signatures. It interacts with custodians for collateral custody and allows token transfers.

extraData

isActive

// SPDX-License-Identifier: BUSL-1.1
//
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//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                         ↑↑↑↑ ↑↑↑↑   ↑↑↑↑↑↑↑    ↑↑↑↑↑↑↑↑↑     ↑↑ ↑↑↑   ↑↑↑↑↑↑↑↑↑↑↑     ↑↑↑↑↑↑↑↑↑↑    ↑↑↑ ↑↑↑  ↑↑↑↑↑↑↑
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//                    ↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑         ↑↑↑            ↑↑↑↑    ↑↑       ↑↑↑       ↑↑   ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑             ↑↑↑↑↑↑↑    ↑↑↑     ↑↑↑↑↑↑  ↑↑↑    ↑↑       ↑↑↑       ↑↑↑  ↑↑↑       ↑↑↑  ↑↑↑        ↑↑↑
//  ↑↑↑↑  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑   ↑↑↑   ↑↑↑                  ↑↑    ↑↑↑     ↑↑      ↑↑↑    ↑↑       ↑↑↑      ↑↑↑   ↑↑↑      ↑↑↑   ↑↑↑        ↑↑↑
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//                  ↑↑↑↑↑↑↑↑↑↑↑↑↑↑                             ↑↑↑↑↑↑       ↑↑↑↑     ↑↑↑↑↑ ↑↑↑    ↑↑       ↑↑↑ ↑↑↑↑↑↑        ↑↑↑↑↑↑      ↑↑↑          ↑↑↑
//                ↑↑↑↑↑  ↑↑↑↑  ↑↑↑↑↑                                                                       ↑↑↑
//              ↑↑↑↑↑    ↑↑↑↑    ↑↑↑↑                                                                      ↑↑↑     Starport: Lending Kernel
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//                       ↑↑↑↑       ↑↑↑↑↑                                                                          Designed with love by Astaria Labs, Inc
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pragma solidity ^0.8.17;

import {Starport} from "../Starport.sol";
import {Validation} from "../lib/Validation.sol";

abstract contract Status is Validation {
    /*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
    /*                      EXTERNAL FUNCTIONS                    */
    /*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/

    /*
    * @dev Returns true if the loan is still active, false otherwise.
    * @param loan The loan to check.
    * @param extraData Additional data to be used in the status check.
    * @return bool True if the loan is still active, false otherwise.
    */
    function isActive(Starport.Loan calldata loan, bytes calldata extraData) external view virtual returns (bool);
}


Mission: instant liquidity for any on-chain asset