code: def atlasdb_get_zonefiles_by_block( from_block, to_block, offset, count, name=None, con=None, path=None ):
      
      ret = None
  
      if count > 100:
          return {'error' : 'Count must be less than 100'}
  
      with AtlasDBOpen(con=con, path=path) as dbcon:
  
          sql = 'SELECT name,zonefile_hash,txid,block_height,inv_index FROM zonefiles WHERE block_height >= ? AND block_height <= ?'
          args = (from_block, to_block)
  
          if name:
              sql += ' AND name = ?'
              args += (name,)
  
          sql += 'ORDER BY inv_index LIMIT ? OFFSET ?;'
          args += (count, offset)
  
          cur = dbcon.cursor()
          res = atlasdb_query_execute( cur, sql, args )
  
          ret = []
  
          for zfinfo in res:
              ret.append({
                  'name' : zfinfo['name'],
                  'zonefile_hash' : zfinfo['zonefile_hash'],
                  'block_height' : zfinfo['block_height'],
                  'txid' : zfinfo['txid'],
                  'inv_index': zfinfo['inv_index'],
              })
  
      return ret
docs: Look up all zonefile hashes in a block range.  Optionally filter by name.
      Returns [{'name': ..., 'zonefile_hash': ..., 'block_height': ..., 'txid': ..., 'inv_index': ...}]