Bugfix

gradle.properties

@@ -6,7 +6,7 @@ minecraft_version=1.21.1
 yarn_mappings=1.21.1+build.3
 loader_version=0.16.2
 # Mod Properties
-mod_version=1.4.2
+mod_version=1.4.3
 maven_group=systems.brn
 archives_base_name=servershop
 # Dependencies

src/main/java/systems/brn/servershop/lib/records/ItemPriceRecord.java

@@ -16,17 +16,20 @@ public record ItemPriceRecord(int buyPrice, int sellPrice, ItemStack stack) {
         nbt.putInt("SellPrice", this.sellPrice);
 
         // Serialize the ItemStack to NBT and add it to the compound
-        NbtElement stackNbt = stack.encode(wrapperLookup);
-        nbt.put("ItemStack", stackNbt); // Adds the ItemStack's NBT data to the main NBT compound
+        if (stack != null && !stack.isEmpty()) {
+            NbtElement stackNbt = stack.encode(wrapperLookup);
+            nbt.put("ItemStack", stackNbt); // Adds the ItemStack's NBT data to the main NBT compound
+            return nbt;
+        }
+        return null;
 
-        return nbt;
     }
 
     public static ItemPriceRecord fromNbt(NbtCompound nbt, RegistryWrapper.WrapperLookup wrapperLookup) {
         int buyPrice = nbt.getInt("BuyPrice");
         int sellPrice = nbt.getInt("SellPrice");
 
-        if(sellPrice > buyPrice && buyPrice != 0) {
+        if (sellPrice > buyPrice && buyPrice != 0) {
             buyPrice = sellPrice;
         }
         // Deserialize the ItemStack from the NBT

src/main/java/systems/brn/servershop/lib/storages/PriceStorage.java

@@ -116,7 +116,10 @@ public class PriceStorage {
         for (ItemStack stack : prices.keySet()) {
             ItemPriceRecord itemPriceRecord = prices.get(stack);
             if (!stack.isEmpty()) {
-                nbtList.add(itemPriceRecord.toNbt(wrapperLookup));
+                NbtCompound compound = itemPriceRecord.toNbt(wrapperLookup);
+                if (compound != null) {
+                    nbtList.add(compound);
+                }
             }
         }