build priv

minetest.register_privilege("build", "Can place and dig nodes/blocks")

minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack, pointed_thing)
    if not minetest.get_player_privs(placer:get_player_name()).build then
       minetest.remove_node(pos)
       return false, itemstack
    end
end)

minetest.register_on_dignode(function(pos, oldnode, digger)
    if not minetest.get_player_privs(digger:get_player_name()).build then
       minetest.set_node({x=pos.x, y=pos.y, z=pos.z}, oldnode)
       return false
    end
end)