How to make logs unbreakable by hand?

make 2 versions of it and use trigger and procedures to change it to a breakable version of this block.

Note:hardness should more than or equal to 10,000 but do not check "is block unbreakable?"

I am so fired up right now with this mod idea! I have been wanting to do a mod like this for so long. My plans would be limiting the player inventory to 3 slots (main hand, offhand, inventory). Also, I would do similar things to this request. I almost want to join in on this project of yours!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

To cut to the chase, this is an event I came up with off the spot;

    @SubscribeEvent
    public void harvestCheck(PlayerEvent.BreakSpeed event)
    {
        BlockState block = event.getState();
        if (block.getBlock() instanceof LogBlock)
        {
            PlayerEntity player = event.getPlayer();
            ItemStack item = player.getItemStackFromSlot(EquipmentSlotType.MAINHAND);
            if (!(item.getItem() instanceof AxeItem))
            {
                event.setCanceled(true);
            }
        }
    }

Don't be mad if I do a similar mod on my own! Good luck to you!

You just chuck that tang right in 'er!

But actually, you can just put that snippet in any class as long as it is registered using;

		MinecraftForge.EVENT_BUS.register(new AnyDangClass());

You should probably just create a procedure, lock it, and put it in.

If you need more information or help. Post code, preferably in a pastebin/git. Or add me on discord!

its a couple years late, but this is the (simple) solution i found in case anybody new wants to see. works perfectly:

basically, it checks if the block is wood, then checks if the player is holding an axe of any type. (this works with both modded woods and axes.)

only if both are true, it cancels the event that triggered it, stopping the left click. because the player is holding click, they continue to punch, but it does zero damage to the block itself. this essentially is exactly how the bedrock block works.

you can also do this with stone and pickaxes, dirt and shovels, pretty much anything. all you need is more procedures