The endorsement of a chunk by a chunk validator. By providing this, a
chunk validator has verified that the chunk state witness is correct.
This is the part of the chunk endorsement that is actually being signed.
Represents the base state and the expected post-state-root of a chunk’s state
transition. The actual state transition itself is not included here.
The state witness for a chunk; proves the state transition that the
chunk attests to.
Stored on disk for each chunk, including missing chunks, in order to
produce a chunk state witness when needed.