Function get_block_extended_header 

pub fn get_block_extended_header(
    db: &BlockchainDatabase,
    block_hash: &BlockHash,
    tx_ro: &Snapshot,
    tapes: &TapesReadTransaction<'_>,
) -> DbResult<ExtendedBlockHeader>

Retrieve a [ExtendedBlockHeader] from the database.

This extracts all the data from the database tables needed to create a full ExtendedBlockHeader.

Notes

This is more expensive than get_block_extended_header_from_height