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                if ($buyerMoney < $shopInfo['price']) {
                    $player->sendMessage("Your money is not enough!");
                    return;
                }
                /** @var Chest $chest */
                $chest = $player->getWorld()->getTile(new Vector3($shopInfo['chestX'], $shopInfo['chestY'], $shopInfo['chestZ']));
                $itemNum = 0;
                $pID = $shopInfo['productID'];
                $pMeta = $shopInfo['productMeta'];
                for ($i = 0; $i < $chest->getInventory()->getSize(); $i++) {
                    $item = $chest->getInventory()->getItem($i);
                    // use getDamage() method to get metadata of item
                    if ($item->getID() === $pID and $item->getMeta() === $pMeta) $itemNum += $item->getCount();
                }
                if ($itemNum < $shopInfo['saleNum']) {
                    $player->sendMessage("This shop is out of stock!");
                    if (($p = $this->plugin->getServer()->getPlayerExact($shopInfo['shopOwner'])) !== null) {
                        $p->sendMessage("Your ChestShop is out of stock! Replenish Item: " . ItemFactory::getInstance()->get($pID, $pMeta)->getName());
                    }
                    return;

#0 pmsrc/src/event/RegisteredListener(60): ChestShop\EventListener->onPlayerInteract(object pocketmine\event\player\PlayerInteractEvent#844853)
#1 pmsrc/src/event/Event(62): pocketmine\event\RegisteredListener->callEvent(object pocketmine\event\player\PlayerInteractEvent#844853)
#2 pmsrc/src/world/World(1861): pocketmine\event\Event->call()
#3 pmsrc/src/player/Player(1683): pocketmine\world\World->useItemOn(object pocketmine\math\Vector3#696904, object pocketmine\item\Shovel#1111145, int 2, object pocketmine\math\Vector3#942591, object ipad54\netherblocks\player\Player#830402, true)
#4 pmsrc/src/network/mcpe/handler/InGamePacketHandler(445): pocketmine\player\Player->interactBlock(object pocketmine\math\Vector3#696904, int 2, object pocketmine\math\Vector3#942591)
#5 pmsrc/src/network/mcpe/handler/InGamePacketHandler(303): pocketmine\network\mcpe\handler\InGamePacketHandler->handleUseItemTransaction(object pocketmine\network\mcpe\protocol\types\inventory\UseItemTransactionData#905878)
#6 pmsrc/vendor/nethergamesmc/bedrock-protocol/src/InventoryTransactionPacket(105): pocketmine\network\mcpe\handler\InGamePacketHandler->handleInventoryTransaction(object pocketmine\network\mcpe\protocol\InventoryTransactionPacket#743408)
#7 pmsrc/src/network/mcpe/NetworkSession(434): pocketmine\network\mcpe\protocol\InventoryTransactionPacket->handle(object pocketmine\network\mcpe\handler\InGamePacketHandler#1177317)
#8 pmsrc/src/network/mcpe/NetworkSession(394): pocketmine\network\mcpe\NetworkSession->handleDataPacket(object pocketmine\network\mcpe\protocol\InventoryTransactionPacket#743408, int 527, string[182] ......A.......P.............DamageP......PiggyCEItemVersion.......display...Name)
#9 pmsrc/src/network/mcpe/raklib/RakLibInterface(192): pocketmine\network\mcpe\NetworkSession->handleEncoded(string[224] c.a...x........#....NF....N..........\.s..S.b..B.........%[email protected])
#10 pmsrc/vendor/pocketmine/raklib-ipc/src/RakLibToUserThreadMessageReceiver(42): pocketmine\network\mcpe\raklib\RakLibInterface->onPacketReceive(int 287, string[225] .c.a...x........#....NF....N..........\.s..S.b..B.........%[email protected])
#11 pmsrc/src/network/mcpe/raklib/RakLibInterface(122): raklib\server\ipc\RakLibToUserThreadMessageReceiver->handle(object pocketmine\network\mcpe\raklib\RakLibInterface#525310)
#12 pmsrc/vendor/pocketmine/snooze/src/SleeperHandler(123): pocketmine\network\mcpe\raklib\RakLibInterface->pocketmine\network\mcpe\raklib\{closure}()
#13 pmsrc/vendor/pocketmine/snooze/src/SleeperHandler(82): pocketmine\snooze\SleeperHandler->processNotifications()
#14 pmsrc/src/Server(1709): pocketmine\snooze\SleeperHandler->sleepUntil(float 1655984771.8681)
#15 pmsrc/src/Server(1068): pocketmine\Server->tickProcessor()
#16 pmsrc/src/PocketMine(304): pocketmine\Server->__construct(object BaseClassLoader#3, object pocketmine\utils\MainLogger#2, string[11] /root/acid/, string[19] /root/acid/plugins/)
#17 pmsrc/src/PocketMine(327): pocketmine\server()
#18 pmsrc(11): require(string[55] phar:///root/acid/PocketMine-MP.phar/src/PocketMine.php)