Help with Item Attributes, for 1.15.2 snap changes

Code:

net.minecraft.server.v1_15_R2.ItemStack nms = CraftItemStack.asNMSCopy(item);
    NBTTagCompound tag = new NBTTagCompound();
    NBTTagCompound cmpd = new NBTTagCompound();
    cmpd.set("AttributeName", new NBTTagString("Magika"));
    cmpd.set("Name", new NBTTagString("Magika"));
    cmpd.set("Amount", new NBTTagInt(20));
    cmpd.set("Operation", new NBTTagInt(0));
    cmpd.set("UUIDLeast", new NBTTagInt(894654));
    cmpd.set("UUIDMost", new NBTTagInt(2872));
    cmpd.set("Slot", new NBTTagString("chest"));
    NBTTagList list = new NBTTagList();
    list.add(cmpd);
    tag.set("AttributeModifiers", list);
    nms.setTag(tag);
    ItemStack itemS = CraftItemStack.asCraftMirror(nms);

please sir I need some help as to where I am going wrong or for any newer methods.

Code:

public class Itemsmith {

    public ItemStack makeItem(Material m, String name, String desc, int amount) {
     
        ItemStack item = new ItemStack (m, amount);
     
        //Create the item's meta data (name, lore/desc text, etc.)
        ItemMeta im = item.getItemMeta();
        im.setDisplayName(name);
        //Creates the lore
        ArrayList<String> lore = new ArrayList<String>();
        lore.add(desc);
        im.setLore(lore);
        //Hides the vanilla Minecraft tooltip text
        im.addItemFlags(ItemFlag.HIDE_ENCHANTS);
        im.addItemFlags(ItemFlag.HIDE_ATTRIBUTES);
        //Sets the item's meta data to the custom "im" meta data
        item.setItemMeta(im);
     
        return item;
     
    }
 
    public ItemStack buildWeapon(String sword) {
     
        Material m = Material;
        String name = new String();
        String desc = new String();
     
        if ( sword.toLowerCase().equals("midas") ) {
            m = Material.GOLDEN_SWORD;
            name = (ChatColor.GOLD + "" + ChatColor.BOLD + "Sword of King Midas");
            desc = (ChatColor.DARK_GRAY + "" + ChatColor.ITALIC + "The golden sword of King Midas!");
        } else if ( sword.toLowerCase().equals("excalibur") ) {
            m = Material.IRON_SWORD;
            name = (ChatColor.GOLD + "" + ChatColor.BOLD + "Sword of King Arthur");
            desc = (ChatColor.DARK_GRAY + "" + ChatColor.ITALIC + "The fantastic sword of King Arthur!");
        } else if ( sword.toLowerCase().equals("troll") ) {
            m = Material.STONE_SWORD;
            name = (ChatColor.GOLD + "" + ChatColor.BOLD + "Sword of the Troll King");
            desc = (ChatColor.DARK_GRAY + "" + ChatColor.ITALIC + "The powerful and heavy Troll King's sword!");
        }
     
        return makeItem(m, name, desc, 1);
     
    }
 
}

Still going wrong but here is what I have now

Even a simple attack damage attribute version would be fine, I just need tips

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

whats the trouble

 

private ItemStack addAttribute(ItemStack item, String attribute, int amount, int operation, int least, int most, String slot) {
net.minecraft.server.v1_15_R1.ItemStack nmsStack = CraftItemStack.asNMSCopy(item);
NBTTagCompound compound = (nmsStack.hasTag()) ? nmsStack.getTag() : new NBTTagCompound();

NBTTagList modifiers = new NBTTagList();
NBTTagCompound speed = new NBTTagCompound();


speed.set("AttributeName", new NBTTagString("generic.attackSpeed"));
speed.set("Name", new NBTTagString("generic.attackSpeed"));
speed.set("Amount", new NBTTagDouble(0.01));
speed.set("Operation", new NBTTagInt(0));
speed.set("UUIDLeast", new NBTTagInt(894654));
speed.set("UUIDMost", new NBTTagInt(2872));
speed.set("Slot", new NBTTagString("mainhand"));

modifiers.add(speed);
compound.set("AttributeModifiers", modifiers);
nmsStack.setTag(compound);

item = CraftItemStack.asBukkitCopy(nmsStack);
return item;
}


Where am I going wrong?!!

many thnaks for the help - ps this is the latest try I have given it!

still no luck on my many searches

Hello? its been three days

EDIT by Moderator: merged posts, please use the edit button instead of double posting.