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// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.23;

// use copies of openzeppelin contracts with changed names for avoid dependency issues
import "../interfaces/IERC20.sol";
import "../interfaces/IERC721.sol";
import "../interfaces/IPawnShop.sol";
import "../lib/AppLib.sol";
import "../openzeppelin/ERC721Holder.sol";
import "../openzeppelin/ReentrancyGuard.sol";
import "../relay/ERC2771Context.sol";

interface IDelegation {
  function clearDelegate(bytes32 _id) external;
  function setDelegate(bytes32 _id, address _delegate) external;
}

/// @title PawnShop.sol contract provides a useful and flexible solution for borrowing
///        and lending assets with a unique feature of supporting both ERC721 and ERC20 tokens as collateral.
///        The contract's modular design allows for easy customization of fees, waiting periods,
///        and other parameters, providing a solid foundation for a decentralized borrowing and lending platform.
/// @author belbix
contract PawnShop is ERC721Holder, ReentrancyGuard, IPawnShop, ERC2771Context {

  //region ------------------------ Constants

  /// @notice Version of the contract
  /// @dev Should be incremented when contract changed
  string public constant VERSION = "1.0.10";
  /// @dev Time lock for any governance actions
  uint constant public TIME_LOCK = 2 days;
  /// @dev Denominator for any internal computation with low precision
  uint constant public DENOMINATOR = 10000;
  /// @dev Governance can't set fee more than this value
  uint constant public PLATFORM_FEE_MAX = 1000; // 10%
  /// @dev Standard auction duration that refresh when a new bid placed
  uint constant public AUCTION_DURATION = 1 days;
  /// @dev Timestamp date when contract created
  uint public immutable createdTs;
  /// @dev Block number when contract created
  uint public immutable createdBlock;
  //endregion ------------------------ Constants

  //region ------------------------ Changeable variables

  /// @dev Contract owner. Should be a multi-signature wallet.
  address public owner;
  /// @dev Fee recipient. Assume it will be a place with ability to manage different tokens
  address public feeRecipient;
  /// @dev 10% by default, percent of acquired tokens that will be used for buybacks
  uint public platformFee = 1000;
  /// @dev Amount of tokens for open position. Protection against spam
  uint public positionDepositAmount;
  /// @dev Token for antispam protection. Zero address means no protection
  address public positionDepositToken;
  /// @dev Time-locks for governance actions
  mapping(GovernanceAction => TimeLock) public timeLocks;
  //endregion ------------------------ Changeable variables

  //region ------------------------ Positions

  /// @inheritdoc IPawnShop
  uint public override positionCounter = 1;
  /// @dev PosId => Position. Hold all positions. Any record should not be removed
  mapping(uint => Position) public positions;
  /// @inheritdoc IPawnShop
  uint[] public override openPositions;
  /// @inheritdoc IPawnShop
  mapping(address => uint[]) public override positionsByCollateral;
  /// @inheritdoc IPawnShop
  mapping(address => uint[]) public override positionsByAcquired;
  /// @inheritdoc IPawnShop
  mapping(address => uint[]) public override borrowerPositions;
  /// @inheritdoc IPawnShop
  mapping(address => uint[]) public override lenderPositions;
  /// @inheritdoc IPawnShop
  mapping(IndexType => mapping(uint => uint)) public override posIndexes;
  //endregion ------------------------ Positions

  //region ------------------------ Auction

  /// @inheritdoc IPawnShop
  uint public override auctionBidCounter = 1;
  /// @dev BidId => Bid. Hold all bids. Any record should not be removed
  mapping(uint => AuctionBid) public auctionBids;
  /// @inheritdoc IPawnShop
  mapping(address => mapping(uint => uint)) public override lenderOpenBids;
  /// @inheritdoc IPawnShop
  mapping(uint => uint[]) public override positionToBidIds;
  /// @inheritdoc IPawnShop
  mapping(uint => uint) public override lastAuctionBidTs;
  //endregion ------------------------ Auction

  //region ------------------------ Constructor

  constructor(
    address _owner,
    address _depositToken,
    uint _positionDepositAmount,
    address _feeRecipient
  ) {
    if (_owner == address(0)) revert IAppErrors.PawnShopZeroOwner();
    if (_feeRecipient == address(0)) revert IAppErrors.PawnShopZeroFeeRecipient();
    owner = _owner;
    feeRecipient = _feeRecipient;
    positionDepositToken = _depositToken;
    createdTs = block.timestamp;
    createdBlock = block.number;
    positionDepositAmount = _positionDepositAmount;
  }
  //endregion ------------------------ Constructor

  //region ------------------------ Restrictions
  modifier onlyOwner() {
    if (_msgSender() != owner) revert IAppErrors.PawnShopNotOwner();
    _;
  }

  /// @dev Check time lock for governance actions and revert if conditions wrong
  modifier checkTimeLock(GovernanceAction action, address _address, uint _uint){
    TimeLock memory timeLock = timeLocks[action];
    if (timeLock.time == 0 || timeLock.time >= block.timestamp) revert IAppErrors.PawnShopTimeLock();
    if (_address != address(0)) {
      if (timeLock.addressValue != _address) revert IAppErrors.PawnShopWrongAddressValue();
    }
    if (_uint != 0) {
      if (timeLock.uintValue != _uint) revert IAppErrors.PawnShopWrongUintValue();
    }
    _;
    delete timeLocks[action];
  }
  //endregion ------------------------ Restrictions

  //region ------------------------ User actions

  /// @inheritdoc IPawnShop
  function openPosition(
    address _collateralToken,
    uint _collateralAmount,
    uint _collateralTokenId,
    address _acquiredToken,
    uint _acquiredAmount,
    uint _posDurationBlocks,
    uint _posFee,
    uint minAuctionAmount
  ) external nonReentrant override returns (uint){
    if (_posFee > DENOMINATOR * 10) revert IAppErrors.PawnShopPosFeeAbsurdlyHigh();
    if (_posDurationBlocks == 0 && _posFee != 0) revert IAppErrors.PawnShopPosFeeForInstantDealForbidden();
    if (_collateralAmount == 0 && _collateralTokenId == 0) revert IAppErrors.PawnShopWrongAmounts();
    if (_collateralToken == address(0)) revert IAppErrors.PawnShopZeroCToken();
    if (_acquiredToken == address(0)) revert IAppErrors.PawnShopZeroAToken();

    AssetType assetType = _getAssetType(_collateralToken);
    if (
      (!(assetType == AssetType.ERC20 && _collateralAmount != 0 && _collateralTokenId == 0))
      && (!(assetType == AssetType.ERC721 && _collateralAmount == 0 && _collateralTokenId != 0))
    ) revert IAppErrors.PawnShopIncorrect();

    Position memory pos;
    {
      PositionInfo memory info = PositionInfo(
        _posDurationBlocks,
        _posFee,
        block.number,
        block.timestamp
      );

      PositionCollateral memory collateral = PositionCollateral(
        _collateralToken,
        assetType,
        _collateralAmount,
        _collateralTokenId
      );

      PositionAcquired memory acquired = PositionAcquired(
        _acquiredToken,
        _acquiredAmount
      );

      PositionExecution memory execution = PositionExecution(
        address(0),
        0,
        0,
        0
      );

      pos = Position(
        positionCounter, // id
        _msgSender(), // borrower
        positionDepositToken,
        positionDepositAmount,
        true, // open
        minAuctionAmount,
        info,
        collateral,
        acquired,
        execution
      );
    }

    openPositions.push(pos.id);
    posIndexes[IndexType.LIST][pos.id] = openPositions.length - 1;

    positionsByCollateral[_collateralToken].push(pos.id);
    posIndexes[IndexType.BY_COLLATERAL][pos.id] = positionsByCollateral[_collateralToken].length - 1;

    positionsByAcquired[_acquiredToken].push(pos.id);
    posIndexes[IndexType.BY_ACQUIRED][pos.id] = positionsByAcquired[_acquiredToken].length - 1;

    borrowerPositions[_msgSender()].push(pos.id);
    posIndexes[IndexType.BORROWER_POSITION][pos.id] = borrowerPositions[_msgSender()].length - 1;

    positions[pos.id] = pos;
    positionCounter++;

    _takeDeposit(pos.id);
    _transferCollateral(pos.collateral, _msgSender(), address(this));
    emit PositionOpened(
      _msgSender(),
      pos.id,
      _collateralToken,
      _collateralAmount,
      _collateralTokenId,
      _acquiredToken,
      _acquiredAmount,
      _posDurationBlocks,
      _posFee
    );
    return pos.id;
  }

  /// @inheritdoc IPawnShop
  function closePosition(uint id) external nonReentrant override {
    Position storage pos = positions[id];
    if (pos.id != id) revert IAppErrors.PawnShopWrongId();
    if (pos.borrower != _msgSender()) revert IAppErrors.PawnShopNotBorrower();
    if (pos.execution.lender != address(0)) revert IAppErrors.PawnShopPositionExecuted();
    if (!pos.open) revert IAppErrors.PawnShopPositionClosed();

    _removePosFromIndexes(pos);
    removeIndexed(borrowerPositions[pos.borrower], posIndexes[IndexType.BORROWER_POSITION], pos.id);

    _transferCollateral(pos.collateral, address(this), pos.borrower);
    _returnDeposit(id);
    pos.open = false;
    emit PositionClosed(_msgSender(), id);
  }

  /// @inheritdoc IPawnShop
  function bid(uint id, uint amount) external nonReentrant override {
    Position storage pos = positions[id];
    if (pos.id != id) revert IAppErrors.PawnShopWrongId();
    if (!pos.open) revert IAppErrors.PawnShopPositionClosed();
    if (pos.execution.lender != address(0)) revert IAppErrors.PawnShopPositionExecuted();
    if (pos.acquired.acquiredAmount != 0) {
      if (amount != pos.acquired.acquiredAmount) revert IAppErrors.PawnShopWrongBidAmount();
      _executeBid(pos, 0, amount, _msgSender(), _msgSender());
    } else {
      _auctionBid(pos, amount, _msgSender());
    }
  }

  /// @inheritdoc IPawnShop
  function claim(uint id) external nonReentrant override {
    Position storage pos = positions[id];
    if (pos.id != id) revert IAppErrors.PawnShopWrongId();
    if (pos.execution.lender != _msgSender()) revert IAppErrors.PawnShopNotLender();
    uint posEnd = pos.execution.posStartBlock + pos.info.posDurationBlocks;
    if (posEnd >= block.number) revert IAppErrors.PawnShopTooEarlyToClaim();
    if (!pos.open) revert IAppErrors.PawnShopPositionClosed();

    _endPosition(pos);
    _transferCollateral(pos.collateral, address(this), _msgSender());
    _returnDeposit(id);
    emit PositionClaimed(_msgSender(), id);
  }

  /// @inheritdoc IPawnShop
  function redeem(uint id) external nonReentrant override {
    Position storage pos = positions[id];
    if (pos.id != id) revert IAppErrors.PawnShopWrongId();
    if (pos.borrower != _msgSender()) revert IAppErrors.PawnShopNotBorrower();
    if (pos.execution.lender == address(0)) revert IAppErrors.PawnShopPositionNotExecuted();
    if (!pos.open) revert IAppErrors.PawnShopPositionClosed();

    _endPosition(pos);
    uint toSend = _toRedeem(id);
    IERC20(pos.acquired.acquiredToken).transferFrom(_msgSender(), pos.execution.lender, toSend);
    _transferCollateral(pos.collateral, address(this), _msgSender());
    _returnDeposit(id);
    emit PositionRedeemed(_msgSender(), id);
  }

  /// @inheritdoc IPawnShop
  function acceptAuctionBid(uint posId) external nonReentrant override {
    if (lastAuctionBidTs[posId] + AUCTION_DURATION >= block.timestamp) revert IAppErrors.PawnShopAuctionNotEnded();
    if (positionToBidIds[posId].length == 0) revert IAppErrors.PawnShopNoBids();
    uint bidId = positionToBidIds[posId][positionToBidIds[posId].length - 1];

    AuctionBid storage _bid = auctionBids[bidId];
    if (_bid.id == 0) revert IAppErrors.PawnShopAuctionBidNotFound();
    if (!_bid.open) revert IAppErrors.PawnShopBidClosed();
    if (_bid.posId != posId) revert IAppErrors.PawnShopWrongBid();

    Position storage pos = positions[posId];
    if (pos.borrower != _msgSender()) revert IAppErrors.PawnShopNotBorrower();
    if (!pos.open) revert IAppErrors.PawnShopPositionClosed();

    pos.acquired.acquiredAmount = _bid.amount;
    _executeBid(pos, bidId, _bid.amount, address(this), _bid.lender);
    lenderOpenBids[_bid.lender][pos.id] = 0;
    _bid.open = false;
    emit AuctionBidAccepted(_msgSender(), posId, _bid.id);
  }

  /// @inheritdoc IPawnShop
  function closeAuctionBid(uint bidId) external nonReentrant override {
    AuctionBid storage _bid = auctionBids[bidId];
    address lender = _bid.lender;

    if (_bid.id == 0) revert IAppErrors.PawnShopBidNotFound();
    if (!_bid.open) revert IAppErrors.PawnShopBidClosed();
    if (lender != _msgSender()) revert IAppErrors.PawnShopNotLender();
    Position storage pos = positions[_bid.posId];

    uint _lastAuctionBidTs = lastAuctionBidTs[pos.id];
    bool isAuctionEnded = _lastAuctionBidTs + AUCTION_DURATION < block.timestamp;
    // in case if auction is not accepted during 2 weeks lender can close the bid
    bool isAuctionOverdue = _lastAuctionBidTs + AUCTION_DURATION + 2 weeks < block.timestamp;
    bool isLastBid = false;
    if (positionToBidIds[pos.id].length != 0) {
      uint lastBidId = positionToBidIds[pos.id][positionToBidIds[pos.id].length - 1];
      isLastBid = lastBidId == bidId;
    }
    if (!((isLastBid && isAuctionEnded) || !isLastBid || !pos.open || isAuctionOverdue)) revert IAppErrors.PawnShopAuctionNotEnded();

    lenderOpenBids[lender][pos.id] = 0;
    _bid.open = false;
    IERC20(pos.acquired.acquiredToken).transfer(lender, _bid.amount);
    emit AuctionBidClosed(pos.id, bidId);
  }
  //endregion ------------------------ User actions

  //region ------------------------ Internal functions

  /// @dev Transfer to this contract a deposit
  function _takeDeposit(uint posId) internal {
    Position storage pos = positions[posId];
    if (pos.depositToken != address(0)) {
      IERC20(pos.depositToken).transferFrom(pos.borrower, address(this), pos.depositAmount);
    }
  }

  /// @dev Return to borrower a deposit
  function _returnDeposit(uint posId) internal {
    Position storage pos = positions[posId];
    if (pos.depositToken != address(0)) {
      IERC20(pos.depositToken).transfer(pos.borrower, pos.depositAmount);
    }
  }

  /// @dev Execute bid for the open position
  ///      Transfer acquired tokens to borrower
  ///      In case of instant deal transfer collateral to lender
  function _executeBid(
    Position storage pos,
    uint bidId,
    uint amount,
    address acquiredMoneyHolder,
    address lender
  ) internal {
    uint feeAmount = amount * platformFee / DENOMINATOR;
    uint toSend = amount - feeAmount;
    if (acquiredMoneyHolder == address(this)) {
      IERC20(pos.acquired.acquiredToken).transfer(pos.borrower, toSend);
    } else {
      IERC20(pos.acquired.acquiredToken).transferFrom(acquiredMoneyHolder, pos.borrower, toSend);
      IERC20(pos.acquired.acquiredToken).transferFrom(acquiredMoneyHolder, address(this), feeAmount);
    }
    _transferFee(pos.acquired.acquiredToken, feeAmount);

    pos.execution.lender = lender;
    pos.execution.posStartBlock = block.number;
    pos.execution.posStartTs = block.timestamp;
    _removePosFromIndexes(pos);

    lenderPositions[lender].push(pos.id);
    posIndexes[IndexType.LENDER_POSITION][pos.id] = lenderPositions[lender].length - 1;

    // instant buy
    if (pos.info.posDurationBlocks == 0) {
      _transferCollateral(pos.collateral, address(this), lender);
      _returnDeposit(pos.id); // fix for SCB-1029
      _endPosition(pos);
    }
    emit BidExecuted(pos.id, bidId, amount, acquiredMoneyHolder, lender);
  }

  /// @dev Open an auction bid
  ///      Transfer acquired token to this contract
  function _auctionBid(Position storage pos, uint amount, address lender) internal {
    if (lenderOpenBids[lender][pos.id] != 0) revert IAppErrors.PawnShopBidAlreadyExists();
    if (amount < pos.minAuctionAmount) revert IAppErrors.PawnShopTooLowBid();

    if (positionToBidIds[pos.id].length != 0) {
      // if we have bids need to check auction duration
      if (lastAuctionBidTs[pos.id] + AUCTION_DURATION <= block.timestamp) revert IAppErrors.PawnShopAuctionEnded();

      uint lastBidId = positionToBidIds[pos.id][positionToBidIds[pos.id].length - 1];
      AuctionBid storage lastBid = auctionBids[lastBidId];
      if (lastBid.amount * 110 / 100 >= amount) revert IAppErrors.PawnShopNewBidTooLow();
    }

    AuctionBid memory _bid = AuctionBid(
      auctionBidCounter,
      pos.id,
      lender,
      amount,
      true
    );

    positionToBidIds[pos.id].push(_bid.id);
    // write index + 1 for keep zero as empty value
    lenderOpenBids[lender][pos.id] = positionToBidIds[pos.id].length;

    IERC20(pos.acquired.acquiredToken).transferFrom(_msgSender(), address(this), amount);

    lastAuctionBidTs[pos.id] = block.timestamp;
    auctionBids[_bid.id] = _bid;
    auctionBidCounter++;
    emit AuctionBidOpened(pos.id, _bid.id, amount, lender);
  }

  /// @dev Finalize position. Remove position from indexes
  function _endPosition(Position storage pos) internal {
    if (pos.execution.posEndTs != 0) revert IAppErrors.PawnShopAlreadyClaimed();
    pos.open = false;
    pos.execution.posEndTs = block.timestamp;
    removeIndexed(borrowerPositions[pos.borrower], posIndexes[IndexType.BORROWER_POSITION], pos.id);
    if (pos.execution.lender != address(0)) {
      removeIndexed(lenderPositions[pos.execution.lender], posIndexes[IndexType.LENDER_POSITION], pos.id);
    }

  }

  /// @dev Transfer collateral from sender to recipient
  function _transferCollateral(PositionCollateral memory _collateral, address _sender, address _recipient) internal {
    if (_collateral.collateralType == AssetType.ERC20) {
      if (_sender == address(this)) {
        IERC20(_collateral.collateralToken).transfer(_recipient, _collateral.collateralAmount);
      } else {
        IERC20(_collateral.collateralToken).transferFrom(_sender, _recipient, _collateral.collateralAmount);
      }
    } else if (_collateral.collateralType == AssetType.ERC721) {
      IERC721(_collateral.collateralToken).transferFrom(_sender, _recipient, _collateral.collateralTokenId);
    } else {
      revert("TPS: Wrong asset type");
    }
  }

  /// @dev Transfer fee to platform. Assume that token inside this contract
  ///      Do buyback if possible, otherwise just send to controller for manual handling
  function _transferFee(address token, uint amount) internal {
    // little deals can have zero fees
    if (amount == 0) {
      return;
    }
    IERC20(token).transfer(feeRecipient, amount);
  }

  /// @dev Remove position from common indexes
  function _removePosFromIndexes(Position memory _pos) internal {
    removeIndexed(openPositions, posIndexes[IndexType.LIST], _pos.id);
    removeIndexed(positionsByCollateral[_pos.collateral.collateralToken], posIndexes[IndexType.BY_COLLATERAL], _pos.id);
    removeIndexed(positionsByAcquired[_pos.acquired.acquiredToken], posIndexes[IndexType.BY_ACQUIRED], _pos.id);
  }
  //endregion ------------------------ Internal functions

  //region ------------------------ Views

  /// @inheritdoc IPawnShop
  function toRedeem(uint id) external view override returns (uint){
    return _toRedeem(id);
  }

  function _toRedeem(uint id) private view returns (uint){
    Position memory pos = positions[id];
    return pos.acquired.acquiredAmount +
    (pos.acquired.acquiredAmount * pos.info.posFee / DENOMINATOR);
  }

  /// @inheritdoc IPawnShop
  function getAssetType(address _token) external view override returns (AssetType){
    return _getAssetType(_token);
  }

  function _getAssetType(address _token) private view returns (AssetType){
    if (_isERC721(_token)) {
      return AssetType.ERC721;
    } else if (_isERC20(_token)) {
      return AssetType.ERC20;
    } else {
      revert("TPS: Unknown asset");
    }
  }

  /// @dev Return true if given token is ERC721 token
  function isERC721(address _token) external view override returns (bool) {
    return _isERC721(_token);
  }

  //noinspection NoReturn
  function _isERC721(address _token) private view returns (bool) {
    //slither-disable-next-line unused-return,variable-scope,uninitialized-local
    try IERC721(_token).supportsInterface{gas: 30000}(type(IERC721).interfaceId) returns (bool result){
      return result;
    } catch {
      return false;
    }
  }

  /// @dev Return true if given token is ERC20 token
  function isERC20(address _token) external view override returns (bool) {
    return _isERC20(_token);
  }

  //noinspection NoReturn
  function _isERC20(address _token) private view returns (bool) {
    //slither-disable-next-line unused-return,variable-scope,uninitialized-local
    try IERC20(_token).totalSupply{gas: 30000}() returns (uint){
      return true;
    } catch {
      return false;
    }
  }

  /// @inheritdoc IPawnShop
  function openPositionsSize() external view override returns (uint) {
    return openPositions.length;
  }

  /// @inheritdoc IPawnShop
  function auctionBidSize(uint posId) external view override returns (uint) {
    return positionToBidIds[posId].length;
  }

  function positionsByCollateralSize(address collateral) external view override returns (uint) {
    return positionsByCollateral[collateral].length;
  }

  function positionsByAcquiredSize(address acquiredToken) external view override returns (uint) {
    return positionsByAcquired[acquiredToken].length;
  }

  function borrowerPositionsSize(address borrower) external view override returns (uint) {
    return borrowerPositions[borrower].length;
  }

  function lenderPositionsSize(address lender) external view override returns (uint) {
    return lenderPositions[lender].length;
  }

  /// @inheritdoc IPawnShop
  function getPosition(uint posId) external view override returns (Position memory) {
    return positions[posId];
  }

  /// @inheritdoc IPawnShop
  function getAuctionBid(uint bidId) external view override returns (AuctionBid memory) {
    return auctionBids[bidId];
  }
  //endregion ------------------------ Views

  //region ------------------------ Governance actions

  /// @inheritdoc IPawnShop
  function announceGovernanceAction(
    GovernanceAction id,
    address addressValue,
    uint uintValue
  ) external onlyOwner override {
    if (timeLocks[id].time != 0) revert IAppErrors.PawnShopAlreadyAnnounced();
    timeLocks[id] = TimeLock(
      block.timestamp + TIME_LOCK,
      addressValue,
      uintValue
    );
    emit GovernanceActionAnnounced(uint(id), addressValue, uintValue);
  }

  /// @inheritdoc IPawnShop
  function setOwner(address _newOwner) external onlyOwner override
  checkTimeLock(GovernanceAction.ChangeOwner, _newOwner, 0) {
    if (_newOwner == address(0)) revert IAppErrors.PawnShopZeroAddress();
    emit OwnerChanged(owner, _newOwner);
    owner = _newOwner;
  }

  /// @inheritdoc IPawnShop
  function setFeeRecipient(address _newFeeRecipient) external onlyOwner override
  checkTimeLock(GovernanceAction.ChangeFeeRecipient, _newFeeRecipient, 0) {
    if (_newFeeRecipient == address(0)) revert IAppErrors.PawnShopZeroAddress();
    emit FeeRecipientChanged(feeRecipient, _newFeeRecipient);
    feeRecipient = _newFeeRecipient;
  }

  /// @inheritdoc IPawnShop
  function setPlatformFee(uint _value) external onlyOwner override
  checkTimeLock(GovernanceAction.ChangePlatformFee, address(0), _value) {
    if (_value > PLATFORM_FEE_MAX) revert IAppErrors.PawnShopTooHighValue();
    emit PlatformFeeChanged(platformFee, _value);
    platformFee = _value;
  }

  /// @inheritdoc IPawnShop
  function setPositionDepositAmount(uint _value) external onlyOwner override
  checkTimeLock(GovernanceAction.ChangePositionDepositAmount, address(0), _value) {
    emit DepositAmountChanged(positionDepositAmount, _value);
    positionDepositAmount = _value;
  }

  /// @inheritdoc IPawnShop
  function setPositionDepositToken(address _value) external onlyOwner override
  checkTimeLock(GovernanceAction.ChangePositionDepositToken, _value, 0) {
    emit DepositTokenChanged(positionDepositToken, _value);
    positionDepositToken = _value;
  }

  /// @dev Delegate snapshot votes to another address
  function delegateVotes(address _delegateContract,bytes32 _id, address _delegate) external onlyOwner {
    IDelegation(_delegateContract).setDelegate(_id, _delegate);
  }

  /// @dev Remove delegated votes.
  function clearDelegatedVotes(address _delegateContract, bytes32 _id) external onlyOwner {
    IDelegation(_delegateContract).clearDelegate(_id);
  }
  //endregion ------------------------ Governance actions

  //region ------------------------ ArrayLib
  /// @dev Remove from array the item with given id and move the last item on it place
  ///      Use with mapping for keeping indexes in correct ordering
  function removeIndexed(
    uint256[] storage array,
    mapping(uint256 => uint256) storage indexes,
    uint256 id
  ) internal {
    AppLib.removeIndexed(array, indexes, id);
  }
  //endregion ------------------------ ArrayLib
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.23;

/// @notice All errors of the app
interface IAppErrors {

  //region ERC20Errors
  /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
  error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

  /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
  error ERC20InvalidSender(address sender);

  /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
  error ERC20InvalidReceiver(address receiver);

  /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
  error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

  /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
  error ERC20InvalidApprover(address approver);

  /**
   * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
  error ERC20InvalidSpender(address spender);

  //endregion ERC20Errors

  //region ERC721Errors

  /**
  * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
  error ERC721InvalidOwner(address owner);

  /**
   * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
  error ERC721NonexistentToken(uint256 tokenId);

  /**
   * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
  error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

  /**
   * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
  error ERC721InvalidSender(address sender);

  /**
   * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
  error ERC721InvalidReceiver(address receiver);

  /**
   * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
  error ERC721InsufficientApproval(address operator, uint256 tokenId);

  /**
   * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
  error ERC721InvalidApprover(address approver);

  /**
   * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
  error ERC721InvalidOperator(address operator);

  //endregion ERC721Errors

  error ZeroAddress();
  error ZeroValueNotAllowed();
  error ZeroToken();
  error LengthsMismatch();
  error NotEnoughBalance();
  error NotEnoughAllowance();
  error EmptyNameNotAllowed();
  error NotInitialized();
  error AlreadyInitialized();
  error ReentrancyGuardReentrantCall();
  error TooLongString();
  error AlreadyDeployed(address deployed);

  //region Restrictions
  error ErrorNotDeployer(address sender);
  error ErrorNotGoc();
  error NotGovernance(address sender);
  error ErrorOnlyEoa();
  error NotEOA(address sender);
  error ErrorForbidden(address sender);
  error AdminOnly();
  error ErrorNotItemController(address sender);
  error ErrorNotHeroController(address sender);
  error ErrorNotDungeonFactory(address sender);
  error ErrorNotObjectController(address sender);
  error ErrorNotStoryController();
  error ErrorNotAllowedSender();
  error MintNotAllowed();
  //endregion Restrictions

  //region PackingLib
  error TooHighValue(uint value);
  error IntValueOutOfRange(int value);
  error OutOfBounds(uint index, uint length);
  error UnexpectedValue(uint expected, uint actual);
  error WrongValue(uint newValue, uint actual);
  error IntOutOfRange(int value);
  error ZeroValue();
  /// @notice packCustomDataChange requires an input string with two zero bytes at the beginning
  ///         0xXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX0000
  /// This error happens if these bytes are not zero
  error IncompatibleInputString();
  error IncorrectOtherItemTypeKind(uint8 kind);
  //endregion PackingLib

  //region Hero
  error ErrorHeroIsNotRegistered(address heroToken);
  error ErrorHeroIsDead(address heroToken, uint heroTokenId);
  error ErrorHeroNotInDungeon();
  error HeroInDungeon();
  error ErrorNotOwner(address token, uint tokenId);
  error Staked(address heroToken, uint heroId);
  error NameTaken();
  error TooBigName();
  error WrongSymbolsInTheName();
  error NoPayToken(address token, uint payTokenAmount);
  error AlreadyHaveReinforcement();
  /// @notice SIP-001 - Reinforcement requires 3 skills
  error ErrorReinforcementRequiresThreeSkills();
  error WrongTier(uint tier);
  error NotEnoughNgLevel(uint8 ngLevel);
  error NgpNotActive(address hero);
  error RebornNotAllowed();
  error AlreadyPrePaidHero();
  //endregion Hero

  //region Dungeon
  error ErrorDungeonIsFreeAlready();
  error ErrorNoEligibleDungeons();
  error ErrorDungeonBusy();
  error ErrorNoDungeonsForBiome(uint8 heroBiome);
  error ErrorDungeonCompleted();
  error ErrorAlreadyInDungeon();
  error NotEnoughTokens(uint balance, uint expectedBalance);
  error DungeonAlreadySpecific(uint16 dungNum);
  error DungeonAlreadySpecific2(uint16 dungNum);
  error WrongSpecificDungeon();
  //endregion Dungeon

  //region Items
  error ErrorItemNotEligibleForTheSlot(uint itemType, uint8 itemSlot);
  error ErrorItemSlotBusyHand(uint8 slot);
  error ErrorItemSlotBusy();
  error ErrorItemNotInSlot();
  error ErrorConsumableItemIsUsed(address item);
  error ErrorCannotRemoveItemFromMap();
  error ErrorCannotRemoveDataFromMap();
  error EquippedItemsExist();
  error ItemEquipped(address item, uint itemId);
  error ZeroItemMetaType();
  error NotZeroOtherItemMetaType();
  error ZeroLevel();
  error ItemTypeChanged();
  error ItemMetaTypeChanged();
  error UnknownItem(address item);
  error ErrorEquipForbidden();
  error EquipForbiddenInDungeon();
  error TakeOffForbiddenInDungeon();
  error Consumable(address item);
  error NotConsumable(address item);
  error Broken(address item);
  error ZeroLife();
  error RequirementsToItemAttributes();
  error NotEquipped(address item);
  error ZeroDurability();
  error ZeroAugmentation();
  error TooHighAgLevel(uint8 augmentationLevel);
  error UseForbiddenZeroPayToken();
  error IncorrectMinMaxAttributeRange(int32 min, int32 max);
  error SameIdsNotAllowed();
  error ZeroFragility();
  error OtherTypeItemNotRepairable();
  error NotOther();
  error DoubleItemUsageForbidden(uint itemIndex, address[] items);
  error ItemAlreadyUsedInSlot(address item, uint8 equippedSlot);
  error WrongWayToRegisterItem();
  error UnionItemNotFound(address item);
  error WrongListUnionItemTokens(address item, uint countTokens, uint requiredCountTokens);
  error UnknownUnionConfig(uint unionConfigId);
  error UserHasNoKeyPass(address user, address keyPassItem);
  error MaxValue(uint value);
  error UnexpectedOtherItem(address item);
  error NotExist();
  //endregion Items

  //region Stages
  error ErrorWrongStage(uint stage);
  error ErrorNotStages();
  //endregion Stages

  //region Level
  error ErrorWrongLevel(uint heroLevel);
  error ErrorLevelTooLow(uint heroLevel);
  error ErrorHeroLevelStartFrom1();
  error ErrorWrongLevelUpSum();
  error ErrorMaxLevel();
  //endregion Level

  //region Treasure
  error ErrorNotValidTreasureToken(address treasureToken);
  //endregion Treasure

  //region State
  error ErrorPaused();
  error ErrorNotReady();
  error ErrorNotObject1();
  error ErrorNotObject2();
  error ErrorNotCompleted();
  //endregion State

  //region Biome
  error ErrorNotBiome();
  error ErrorIncorrectBiome(uint biome);
  error TooHighBiome(uint biome);
  //endregion Biome

  //region Misc
  error ErrorWrongMultiplier(uint multiplier);
  error ErrorNotEnoughMana(uint32 mana, uint requiredMana);
  error ErrorExperienceMustNotDecrease();
  error ErrorNotEnoughExperience();
  error ErrorNotChances();
  error ErrorNotEligible(address heroToken, uint16 dungNum);
  error ErrorZeroKarmaNotAllowed();
  //endregion Misc

  //region GOC
  error GenObjectIdBiomeOverflow(uint8 biome);
  error GenObjectIdSubTypeOverflow(uint subType);
  error GenObjectIdIdOverflow(uint id);
  error UnknownObjectTypeGoc1(uint8 objectType);
  error UnknownObjectTypeGoc2(uint8 objectType);
  error UnknownObjectTypeGocLib1(uint8 objectType);
  error UnknownObjectTypeGocLib2(uint8 objectType);
  error UnknownObjectTypeForSubtype(uint8 objectSubType);
  error FightDelay();
  error ZeroChance();
  error TooHighChance(uint32 chance);
  error TooHighRandom(uint random);
  error EmptyObjects();
  error ObjectNotFound();
  error WrongGetObjectTypeInput();
  error WrongChances(uint32 chances, uint32 maxChances);
  //endregion GOC

  //region Story
  error PageNotRemovedError(uint pageId);
  error NotItem1();
  error NotItem2();
  error NotRandom(uint32 random);
  error NotHeroData();
  error NotGlobalData();
  error ZeroStoryIdRemoveStory();
  error ZeroStoryIdStoryAction();
  error ZeroStoryIdAction();
  error NotEnoughAmount(uint balance, uint requiredAmount);
  error NotAnswer();
  error AnswerStoryIdMismatch(uint16 storyId, uint16 storyIdFromAnswerHash);
  error AnswerPageIdMismatch(uint16 pageId, uint16 pageIdFromAnswerHash);
  //endregion Story

  //region FightLib
  error NotMagic();
  error NotAType(uint atype);
  //endregion FightLib

  //region MonsterLib
  error NotYourDebuffItem();
  error UnknownAttackType(uint attackType);
  error NotYourAttackItem();
  /// @notice The skill item cannot be used because it doesn't belong either to the hero or to the hero's helper
  error NotYourBuffItem();
  //endregion MonsterLib

  //region GameToken
  error ApproveToZeroAddress();
  error MintToZeroAddress();
  error TransferToZeroAddress();
  error TransferAmountExceedsBalance(uint balance, uint value);
  error InsufficientAllowance();
  error BurnAmountExceedsBalance();
  error NotMinter(address sender);
  //endregion GameToken

  //region NFT
  error TokenTransferNotAllowed();
  error IdOverflow(uint id);
  error NotExistToken(uint tokenId);
  error EquippedItemIsNotAllowedToTransfer(uint tokenId);
  //endregion NFT

  //region CalcLib
  error TooLowX(uint x);
  //endregion CalcLib

  //region Controller
  error NotFutureGovernance(address sender);
  //endregion Controller

  //region Oracle
  error OracleWrongInput();
  //endregion Oracle

  //region ReinforcementController
  error AlreadyStaked();
  error MaxFee(uint8 fee);
  error MinFee(uint8 fee);
  error StakeHeroNotStats();
  error NotStaked();
  error NoStakedHeroes();
  error GuildHelperNotAvailable(uint guildId, address helper, uint helperId);
  error HelperNotAvailableInGivenBiome();
  //endregion ReinforcementController

  //region SponsoredHero
  error InvalidHeroClass();
  error ZeroAmount();
  error InvalidProof();
  error NoHeroesAvailable();
  error AlreadyRegistered();
  //endregion SponsoredHero

  //region SacraRelay
  error SacraRelayNotOwner();
  error SacraRelayNotDelegator();
  error SacraRelayNotOperator();
  error SacraRelayInvalidChainId(uint callChainId, uint blockChainId);
  error SacraRelayInvalidNonce(uint callNonce, uint txNonce);
  error SacraRelayDeadline();
  error SacraRelayDelegationExpired();
  error SacraRelayNotAllowed();
  error SacraRelayInvalidSignature();
  /// @notice This error is generated when custom error is caught
  /// There is no info about custom error in SacraRelay
  /// but you can decode custom error by selector, see tests
  error SacraRelayNoErrorSelector(bytes4 selector, string tracingInfo);
  /// @notice This error is generated when custom error is caught
  /// There is no info about custom error in SacraRelay
  /// but you can decode custom error manually from {errorBytes} as following:
  /// if (keccak256(abi.encodeWithSignature("MyError()")) == keccak256(errorBytes)) { ... }
  error SacraRelayUnexpectedReturnData(bytes errorBytes, string tracingInfo);
  error SacraRelayCallToNotContract(address notContract, string tracingInfo);
  //endregion SacraRelay

  //region Misc
  error UnknownHeroClass(uint heroClass);
  error AbsDiff(int32 a, int32 b);
  //region Misc

  //region ------------------------ UserController
  error NoAvailableLootBox(address msgSender, uint lootBoxKind);
  error FameHallHeroAlreadyRegistered(uint8 openedNgLevel);

  //endregion ------------------------ UserController

  //region ------------------------ Guilds
  error AlreadyGuildMember();
  error NotGuildMember();
  error WrongGuild();
  error GuildActionForbidden(uint right);
  error GuildHasMaxSize(uint guildSize);
  error GuildHasMaxLevel(uint level);
  error TooLongUrl();
  error TooLongDescription();
  error CannotRemoveGuildOwnerFromNotEmptyGuild();
  error GuildControllerOnly();
  error GuildAlreadyHasShelter();
  error ShelterIsBusy();
  error ShelterIsNotRegistered();
  error ShelterIsNotOwnedByTheGuild();
  error ShelterIsInUse();
  error GuildHasNoShelter();
  error ShelterBidIsNotAllowedToBeUsed();
  error ShelterHasHeroesInside();
  error SecondGuildAdminIsNotAllowed();
  error NotEnoughGuildBankBalance(uint guildId);

  error GuildReinforcementCooldownPeriod();
  error NoStakedGuildHeroes();
  error NotStakedInGuild();
  error ShelterHasNotEnoughLevelForReinforcement();
  error NotBusyGuildHelper();

  error GuildRequestNotActive();
  error GuildRequestNotAvailable();
  error NotAdminCannotAddMemberWithNotZeroRights();
  //endregion ------------------------ Guilds

  //region ------------------------ Shelters
  error ErrorNotShelterController();
  error ErrorNotGuildController();
  error ShelterHasNotItem(uint shelterId, address item);
  error MaxNumberItemsSoldToday(uint numSoldItems, uint limit);
  error GuildHasNotEnoughPvpPoints(uint64 pointsAvailable, uint pointRequired);
  error FreeShelterItemsAreNotAllowed(uint shelterId, address item);
  error TooLowShelterLevel(uint8 shelterLevel, uint8 allowedShelterLevel);
  error NotEnoughPvpPointsCapacity(address user, uint usedPoints, uint pricePvpPoints, uint64 capactiy);
  error IncorrectShelterLevel(uint8 shelterLevel);
  //endregion ------------------------ Shelters

  //region ------------------------ Auction
  error WrongAuctionPosition();
  error AuctionPositionClosed();
  error AuctionBidOpened(uint positionId);
  error TooLowAmountToBid();
  error AuctionEnded();
  error TooLowAmountForNewBid();
  error AuctionSellerOnly();
  error AuctionBuyerOnly();
  error AuctionBidNotFound();
  error AuctionBidClosed();
  error OnlyShelterAuction();
  error CannotCloseLastBid();
  error AuctionNotEnded();
  error NotShelterAuction();
  error AuctionPositionOpened(uint positionId);
  error AuctionSellerCannotBid();
  error CannotApplyNotLastBid();
  error AuctionGuildWithShelterCannotBid();
  //endregion ------------------------ Auction

  //region ------------------------ Pawnshop
  error AuctionPositionNotSupported(uint positionId);
  error PositionNotSupported(uint positionId);
  error NotNftPositionNotSupported(uint positionId);
  error CallFailed(bytes callResultData);

  error PawnShopZeroOwner();
  error PawnShopZeroFeeRecipient();
  error PawnShopNotOwner();
  error PawnShopAlreadyAnnounced();
  error PawnShopTimeLock();
  error PawnShopWrongAddressValue();
  error PawnShopWrongUintValue();
  error PawnShopZeroAddress();
  error PawnShopTooHighValue();
  error PawnShopZeroAToken();
  error PawnShopZeroCToken();
  error PawnShopWrongAmounts();
  error PawnShopPosFeeForInstantDealForbidden();
  error PawnShopPosFeeAbsurdlyHigh();
  error PawnShopIncorrect();
  error PawnShopWrongId();
  error PawnShopNotBorrower();
  error PawnShopPositionClosed();
  error PawnShopPositionExecuted();
  error PawnShopWrongBidAmount();
  error PawnShopTooLowBid();
  error PawnShopNewBidTooLow();
  error PawnShopBidAlreadyExists();
  error PawnShopAuctionEnded();
  error PawnShopNotLender();
  error PawnShopTooEarlyToClaim();
  error PawnShopPositionNotExecuted();
  error PawnShopAlreadyClaimed();
  error PawnShopAuctionNotEnded();
  error PawnShopBidClosed();
  error PawnShopNoBids();
  error PawnShopAuctionBidNotFound();
  error PawnShopWrongBid();
  error PawnShopBidNotFound();

  //endregion ------------------------ Pawnshop
}

// 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 ^0.8.0;

/**
 * @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;

import "./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;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
  /**
   * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
   * by `operator` from `from`, this function is called.
   *
   * It must return its Solidity selector to confirm the token transfer.
   * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
   *
   * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
   */
  function onERC721Received(
    address operator,
    address from,
    uint256 tokenId,
    bytes calldata data
  ) external returns (bytes4);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.23;

/// @title Interface for Tetu PawnShop contract
/// @author belbix
interface IPawnShop {

  event PositionOpened(
    address indexed sender,
    uint256 posId,
    address collateralToken,
    uint256 collateralAmount,
    uint256 collateralTokenId,
    address acquiredToken,
    uint256 acquiredAmount,
    uint256 posDurationBlocks,
    uint256 posFee
  );
  event PositionClosed(address indexed borrower, uint256 posId);
  event BidExecuted(
    uint256 posId,
    uint256 bidId,
    uint256 amount,
    address acquiredMoneyHolder,
    address lender
  );
  event AuctionBidOpened(uint256 posId, uint256 bidId, uint256 amount, address lender);
  event PositionClaimed(address indexed sender, uint256 posId);
  event PositionRedeemed(address indexed sender, uint256 posId);
  event AuctionBidAccepted(address indexed borrower, uint256 posId, uint256 bidId);
  event AuctionBidClosed(uint256 posId, uint256 bidId);

  event GovernanceActionAnnounced(uint256 id, address addressValue, uint256 uintValue);
  event OwnerChanged(address oldOwner, address newOwner);
  event FeeRecipientChanged(address oldRecipient, address newRecipient);
  event PlatformFeeChanged(uint256 oldFee, uint256 newFee);
  event DepositAmountChanged(uint256 oldAmount, uint256 newAmount);
  event DepositTokenChanged(address oldToken, address newToken);

  enum GovernanceAction {
    ChangeOwner, // 0
    ChangeFeeRecipient, // 1
    ChangePlatformFee, // 2
    ChangePositionDepositAmount, // 3
    ChangePositionDepositToken // 4
  }

  enum AssetType {
    ERC20, // 0
    ERC721 // 1
  }

  enum IndexType {
    LIST, // 0
    BY_COLLATERAL, // 1
    BY_ACQUIRED, // 2
    BORROWER_POSITION, // 3
    LENDER_POSITION // 4
  }

  struct TimeLock {
    uint256 time;
    address addressValue;
    uint256 uintValue;
  }

  struct Position {
    uint256 id;
    address borrower;
    address depositToken;
    uint256 depositAmount;
    bool open;
    uint minAuctionAmount;
    PositionInfo info;
    PositionCollateral collateral;
    PositionAcquired acquired;
    PositionExecution execution;
  }

  struct PositionInfo {
    uint256 posDurationBlocks;
    uint256 posFee;
    uint256 createdBlock;
    uint256 createdTs;
  }

  struct PositionCollateral {
    address collateralToken;
    AssetType collateralType;
    uint256 collateralAmount;
    uint256 collateralTokenId;
  }

  struct PositionAcquired {
    address acquiredToken;
    uint256 acquiredAmount;
  }

  struct PositionExecution {
    address lender;
    uint256 posStartBlock;
    uint256 posStartTs;
    uint256 posEndTs;
  }

  struct AuctionBid {
    uint256 id;
    uint256 posId;
    address lender;
    uint256 amount;
    bool open;
  }

  // ****************** VIEWS ****************************

  /// @dev PosId counter. Should start from 1 for keep 0 as empty value
  function positionCounter() external view returns (uint256);

  /// @notice Return Position for given id
  /// @dev AbiEncoder not able to auto generate functions for mapping with structs
  function getPosition(uint256 posId) external view returns (Position memory);

  /// @dev Hold open positions ids. Removed when position closed
  function openPositions(uint256 index) external view returns (uint256 posId);

  /// @dev Collateral token => PosIds
  function positionsByCollateral(address collateralToken, uint256 index) external view returns (uint256 posId);

  /// @dev Acquired token => PosIds
  function positionsByAcquired(address acquiredToken, uint256 index) external view returns (uint256 posId);

  /// @dev Borrower token => PosIds
  function borrowerPositions(address borrower, uint256 index) external view returns (uint256 posId);

  /// @dev Lender token => PosIds
  function lenderPositions(address lender, uint256 index) external view returns (uint256 posId);

  /// @dev index type => PosId => index
  ///      Hold array positions for given type of array
  function posIndexes(IndexType typeId, uint256 posId) external view returns (uint256 index);

  /// @dev BidId counter. Should start from 1 for keep 0 as empty value
  function auctionBidCounter() external view returns (uint256);

  /// @notice Return auction bid for given id
  /// @dev AbiEncoder not able to auto generate functions for mapping with structs
  function getAuctionBid(uint256 bidId) external view returns (AuctionBid memory);

  /// @dev lender => PosId => positionToBidIds + 1
  ///      Lender auction position for given PosId. 0 keep for empty position
  function lenderOpenBids(address lender, uint256 posId) external view returns (uint256 index);

  /// @dev PosId => bidIds. All open and close bids for the given position
  function positionToBidIds(uint256 posId, uint256 index) external view returns (uint256 bidId);

  /// @dev PosId => timestamp. Timestamp of the last bid for the auction
  function lastAuctionBidTs(uint256 posId) external view returns (uint256 ts);

  /// @dev Return amount required for redeem position
  function toRedeem(uint256 posId) external view returns (uint256 amount);

  /// @dev Return asset type ERC20 or ERC721
  function getAssetType(address _token) external view returns (AssetType);

  function isERC721(address _token) external view returns (bool);

  function isERC20(address _token) external view returns (bool);

  /// @dev Return size of active positions
  function openPositionsSize() external view returns (uint256);

  /// @dev Return size of all auction bids for given position
  function auctionBidSize(uint256 posId) external view returns (uint256);

  function positionsByCollateralSize(address collateral) external view returns (uint256);

  function positionsByAcquiredSize(address acquiredToken) external view returns (uint256);

  function borrowerPositionsSize(address borrower) external view returns (uint256);

  function lenderPositionsSize(address lender) external view returns (uint256);

  // ************* USER ACTIONS *************

  /// @dev Borrower action. Assume approve
  ///      Allows the user to create a new borrowing position by depositing their collateral tokens.
  function openPosition(
    address _collateralToken,
    uint256 _collateralAmount,
    uint256 _collateralTokenId,
    address _acquiredToken,
    uint256 _acquiredAmount,
    uint256 _posDurationBlocks,
    uint256 _posFee,
    uint minAuctionPrice
  ) external returns (uint256);

  /// @dev Borrower action
  ///      Close not executed position. Return collateral and deposit to borrower
  function closePosition(uint256 id) external;

  /// @dev Lender action. Assume approve for acquired token
  ///      Place a bid for given position ID
  ///      It can be an auction bid if acquired amount is zero
  function bid(uint256 id, uint256 amount) external;

  /// @dev Lender action
  ///      Transfer collateral to lender if borrower didn't return the loan
  ///      Deposit will be returned to borrower
  function claim(uint256 id) external;

  /// @dev Borrower action. Assume approve on acquired token
  ///      Return the loan to lender, transfer collateral and deposit to borrower
  function redeem(uint256 id) external;

  /// @dev Borrower action. Assume that auction ended.
  ///      Transfer acquired token to borrower
  function acceptAuctionBid(uint256 posId) external;

  /// @dev Lender action. Requires ended auction, or not the last bid
  ///      Close auction bid and transfer acquired tokens to lender
  function closeAuctionBid(uint256 bidId) external;

  /// @dev Announce governance action
  function announceGovernanceAction(GovernanceAction id, address addressValue, uint256 uintValue) external;

  /// @dev Set new contract owner
  function setOwner(address _newOwner) external;

  /// @dev Set new fee recipient
  function setFeeRecipient(address _newFeeRecipient) external;

  /// @dev Platform fee in range 0 - 500, with denominator 10000
  function setPlatformFee(uint256 _value) external;

  /// @dev Tokens amount that need to deposit for a new position
  ///      Will be returned when position closed
  function setPositionDepositAmount(uint256 _value) external;

  /// @dev Tokens that need to deposit for a new position
  function setPositionDepositToken(address _value) external;

  function platformFee() external view returns (uint);
  function positionDepositToken() external view returns (address);
  function AUCTION_DURATION() external view returns (uint);
  function positionDepositAmount() external view returns (uint);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.23;

import "../interfaces/IERC20.sol";

/// @notice Common internal utils
library AppLib {

  /// @notice Make infinite approve of {token} to {spender} if the approved amount is less than {amount}
  /// @dev Should NOT be used for third-party pools
  function approveIfNeeded(address token, uint amount, address spender) internal {
    if (IERC20(token).allowance(address(this), spender) < amount) {
      IERC20(token).approve(spender, type(uint).max);
    }
  }

  /// @dev Remove from array the item with given id and move the last item on it place
  ///      Use with mapping for keeping indexes in correct ordering
  function removeIndexed(
    uint256[] storage array,
    mapping(uint256 => uint256) storage indexes,
    uint256 id
  ) internal {
    uint256 lastId = array[array.length - 1];
    uint256 index = indexes[id];
    indexes[lastId] = index;
    indexes[id] = type(uint256).max;
    array[index] = lastId;
    array.pop();
  }

  /// @notice Return a-b OR zero if a < b
  function sub0(uint32 a, uint32 b) internal pure returns (uint32) {
    return a > b ? a - b : 0;
  }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../interfaces/IERC721Receiver.sol";

/**
 * @dev Implementation of the {IERC721Receiver} interface.
 *
 * Accepts all token transfers.
 * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
 */
contract ERC721Holder is IERC721Receiver {
  /**
   * @dev See {IERC721Receiver-onERC721Received}.
   *
   * Always returns `IERC721Receiver.onERC721Received.selector`.
   */
  function onERC721Received(
    address,
    address,
    uint256,
    bytes memory
  ) public virtual override returns (bytes4) {
    return this.onERC721Received.selector;
  }
}

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

pragma solidity ^0.8.20;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

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

    uint256 private _status;

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

    constructor() {
        _status = NOT_ENTERED;
    }

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (metatx/ERC2771Context.sol)

pragma solidity ^0.8.1;

import "../interfaces/IAppErrors.sol";

/**
 * @dev Context variant with ERC2771 support.
 */
// based on https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/metatx/ERC2771Context.sol
abstract contract ERC2771Context {
  // for whitelist new relayers need to add new constants and update proxies
  address private constant GELATO_RELAY_1_BALANCE_ERC_2771 = 0xd8253782c45a12053594b9deB72d8e8aB2Fca54c;
  address private constant SACRA_RELAY = 0x52CEba41Da235Af367bFC0b0cCd3314cb901bB5F;

  function isTrustedForwarder(address forwarder) public view virtual returns (bool){
    return forwarder == GELATO_RELAY_1_BALANCE_ERC_2771 || forwarder == SACRA_RELAY;
  }

  function _msgSender() internal view virtual returns (address sender) {
    if (isTrustedForwarder(msg.sender)) {
      // The assembly code is more direct than the Solidity version using `abi.decode`.
      /// @solidity memory-safe-assembly
      assembly {
        sender := shr(96, calldataload(sub(calldatasize(), 20)))
      }
      return sender;
    } else {
      return msg.sender;
    }
  }

  function _msgData() internal view virtual returns (bytes calldata) {
    if (isTrustedForwarder(msg.sender)) {
      return msg.data[: msg.data.length - 20];
    } else {
      return msg.data;
    }
  }

  /// @notice Return true if given address is not a smart contract but a wallet address.
  /// @dev It is not 100% guarantee after EIP-3074 implementation, use it as an additional check.
  /// @return true if the address is a wallet.
  function _isNotSmartContract() internal view returns (bool) {
    return isTrustedForwarder(msg.sender) || msg.sender == tx.origin;
  }

  function onlyEOA() internal view {
    if (!_isNotSmartContract()) {
      revert IAppErrors.NotEOA(msg.sender);
    }
  }
}

{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 50
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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IPawnShop.GovernanceAction","name":"","type":"uint8"}],"name":"timeLocks","outputs":[{"internalType":"uint256","name":"time","type":"uint256"},{"internalType":"address","name":"addressValue","type":"address"},{"internalType":"uint256","name":"uintValue","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"toRedeem","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000bbbbb8c4364ec2ce52c59d2ed3e56f307e529a940000000000000000000000007ad5935ea295c4e743e4f2f5b4cda951f41223c20000000000000000000000000000000000000000000000000de0b6b3a7640000000000000000000000000000bbbbb8c4364ec2ce52c59d2ed3e56f307e529a94

-----Decoded View---------------
Arg [0] : _owner (address): 0xbbbbb8C4364eC2ce52c59D2Ed3E56F307E529a94
Arg [1] : _depositToken (address): 0x7AD5935EA295c4E743e4f2f5B4CDA951f41223c2
Arg [2] : _positionDepositAmount (uint256): 1000000000000000000
Arg [3] : _feeRecipient (address): 0xbbbbb8C4364eC2ce52c59D2Ed3E56F307E529a94

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000bbbbb8c4364ec2ce52c59d2ed3e56f307e529a94
Arg [1] : 0000000000000000000000007ad5935ea295c4e743e4f2f5b4cda951f41223c2
Arg [2] : 0000000000000000000000000000000000000000000000000de0b6b3a7640000
Arg [3] : 000000000000000000000000bbbbb8c4364ec2ce52c59d2ed3e56f307e529a94