New validator which performs heavy checks, related to signatures validation and Merkle tree validation.

MaxBlocksPerEpoch is chosen so that even if validator chooses the latest non-liable epoch for BVs, he still cannot vote for latest blocks (latest = from last 128 epochs), as an epoch has at least one block The value is larger than a maximum possible number of blocks in an epoch where a single validator doesn't have 2/3W+1 weight.

Checker which requires only parents list + current epoch info.

Reader is accessed by the validator to get the current state.