Function validate_body_against_header_op 

pub fn validate_body_against_header_op<B, H>(
    chain_spec: impl OpHardforks,
    body: &B,
    header: &H,
) -> Result<(), ConsensusError>
where
    B: BlockBody,
    H: BlockHeader,

Ensures the block response data matches the header.

This ensures the body response items match the header’s hashes:

• ommer hash
• transaction root
• withdrawals root: the body’s withdrawals root must only match the header’s before isthmus