ks only, including the headers and signatures of the shard blocks, but does not download all the data of the shard blocks.</li>
<li>Single-shard node - acts as a top-level node, but also fully downloads and verifies every collation on some specific shard that it cares more about.</li>
<li>Light node - downloads and verifies the block headers of main chain blocks only; does not process any collation headers or transactions unless it needs to read some specific entry in the state of some specific shard, in wh