function canExecMatchOneToMany(
    OrderTypes.MakerOrder calldata makerOrder,
    OrderTypes.MakerOrder[] calldata manyMakerOrders
  ) external view override returns (bool) {
    uint256 numItems;
    bool isOrdersTimeValid = true;
    bool itemsIntersect = true;
    uint256 ordersLength = manyMakerOrders.length;
    for (uint256 i = 0; i < ordersLength; ) {
      if (!isOrdersTimeValid || !itemsIntersect) {
        return false; // short circuit
      }

      uint256 nftsLength = manyMakerOrders[i].nfts.length;
      for (uint256 j = 0; j < nftsLength; ) {
        numItems += manyMakerOrders[i].nfts[j].tokens.length;
        unchecked {
          ++j;
        }
      }

      isOrdersTimeValid =
        isOrdersTimeValid &&
        manyMakerOrders[i].constraints[3] <= block.timestamp &&
        manyMakerOrders[i].constraints[4] >= block.timestamp;

      itemsIntersect = itemsIntersect && doItemsIntersect(makerOrder.nfts, manyMakerOrders[i].nfts);

      unchecked {
        ++i;
      }
    }

    bool _isTimeValid = isOrdersTimeValid &&
      makerOrder.constraints[3] <= block.timestamp &&
      makerOrder.constraints[4] >= block.timestamp;

    uint256 currentMakerOrderPrice = _getCurrentPrice(makerOrder);
    uint256 sumCurrentOrderPrices = _sumCurrentPrices(manyMakerOrders);

    bool _isPriceValid = false;
    if (makerOrder.isSellOrder) {
      _isPriceValid = sumCurrentOrderPrices >= currentMakerOrderPrice;
    } else {
      _isPriceValid = sumCurrentOrderPrices <= currentMakerOrderPrice;
    }

    return (numItems == makerOrder.constraints[0]) && _isTimeValid && itemsIntersect && _isPriceValid;
  }
function _execMatchOneMakerSellToManyMakerBuys(
    bytes32 sellOrderHash,
    bytes32 buyOrderHash,
    OrderTypes.MakerOrder calldata sell,
    OrderTypes.MakerOrder calldata buy,
    uint256 startGasPerOrder,
    uint256 execPrice,
    uint16 protocolFeeBps,
    uint32 wethTransferGasUnits,
    address weth
  ) internal {
    isUserOrderNonceExecutedOrCancelled[buy.signer][buy.constraints[5]] = true;
    uint256 protocolFee = (protocolFeeBps * execPrice) / 10000;
    uint256 remainingAmount = execPrice - protocolFee;
    _execMatchOneToManyOrders(sell.signer, buy.signer, buy.nfts, buy.execParams[1], remainingAmount);
    _emitMatchEvent(
      sellOrderHash,
      buyOrderHash,
      sell.signer,
      buy.signer,
      buy.execParams[0],
      buy.execParams[1],
      execPrice
    );
function _transferERC721s(
    address from,
    address to,
    OrderTypes.OrderItem calldata item
  ) internal {
    uint256 numTokens = item.tokens.length;
    for (uint256 i = 0; i < numTokens; ) {
      IERC721(item.collection).safeTransferFrom(from, to, item.tokens[i].tokenId);
      unchecked {
        ++i;
      }
    }
  }
function canExecMatchOneToMany(
    OrderTypes.MakerOrder calldata makerOrder,
    OrderTypes.MakerOrder[] calldata manyMakerOrders
  ) external view override returns (bool) {
    uint256 numItems;
    uint256 numConstructedItems;
    bool isOrdersTimeValid = true;
    bool itemsIntersect = true;
    uint256 ordersLength = manyMakerOrders.length;
    for (uint256 i = 0; i < ordersLength; ) {
      if (!isOrdersTimeValid || !itemsIntersect) {
        return false; // short circuit
      }

      numConstructedItems += manyMakerOrders[i].constraints[0];

      uint256 nftsLength = manyMakerOrders[i].nfts.length;
      for (uint256 j = 0; j < nftsLength; ) {
        numItems += manyMakerOrders[i].nfts[j].tokens.length;
        unchecked {
          ++j;
        }
      }

      isOrdersTimeValid =
        isOrdersTimeValid &&
        manyMakerOrders[i].constraints[3] <= block.timestamp &&
        manyMakerOrders[i].constraints[4] >= block.timestamp;

      itemsIntersect = itemsIntersect && doItemsIntersect(makerOrder.nfts, manyMakerOrders[i].nfts);

      unchecked {
        ++i;
      }
    }

    bool _isTimeValid = isOrdersTimeValid &&
      makerOrder.constraints[3] <= block.timestamp &&
      makerOrder.constraints[4] >= block.timestamp;

    uint256 currentMakerOrderPrice = _getCurrentPrice(makerOrder);
    uint256 sumCurrentOrderPrices = _sumCurrentPrices(manyMakerOrders);

    bool _isPriceValid = false;
    if (makerOrder.isSellOrder) {
      _isPriceValid = sumCurrentOrderPrices >= currentMakerOrderPrice;
    } else {
      _isPriceValid = sumCurrentOrderPrices <= currentMakerOrderPrice;
    }

    return (numItems == makerOrder.constraints[0]) && (numConstructedItems == numItems) && _isTimeValid && itemsIntersect && _isPriceValid;
  }
