code: func (req *ChtRequest) StoreResult(db ethdb.Database) {
  	hash, num := req.Header.Hash(), req.Header.Number.Uint64()
  
  	rawdb.WriteHeader(db, req.Header)
  	rawdb.WriteTd(db, hash, num, req.Td)
  	rawdb.WriteCanonicalHash(db, hash, num)
  }
docs: // StoreResult stores the retrieved data in local database