diff --git a/antibuildmine.lua b/antibuildmine.lua
index 8b13789..adee810 100644
--- a/antibuildmine.lua
+++ b/antibuildmine.lua
@@ -1 +1,37 @@
+minetest.register_on_craft(function(itemstack, player, old_craft_grid, craft_inv)
+	itemstack:set_count(0)
+	return itemstack
+end)
 
+minetest.register_privilege("build", {
+	description = "Player can build and dig nodes",
+})
+
+minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack, pointed_thing)
+	if not placer then return end
+	if not placer:is_player() then return end
+	if not minetest.check_player_privs(placer:get_player_name(), {build = true}) then
+		minetest.set_node(pos, oldnode)
+		minetest.chat_send_player(placer:get_player_name(), "You can't place this node.")
+		return itemstack
+	end
+end)
+
+minetest.register_on_dignode(function(pos, oldnode, digger)
+	if not digger then return end
+	if not digger:is_player() then return end
+	if not minetest.check_player_privs(digger:get_player_name(), {build = true}) then
+		minetest.set_node(pos, oldnode)
+		minetest.chat_send_player(digger:get_player_name(), "You can't dig this node.")
+		local inv = digger:get_inventory()
+		local lists = inv:get_lists()
+		for list, v in pairs(lists) do
+			for _, itemstack in ipairs(v) do
+				if itemstack:get_name() == oldnode.name then
+					itemstack:set_count(itemstack:get_count() - 1)
+				end
+			end
+		end
+		inv:set_lists(lists)
+	end
+end)