()
| 60 | } |
| 61 | |
| 62 | func (self *Store) init() error { |
| 63 | prefix := []byte{byte(SYS_VERSION)} |
| 64 | version, err := self.db.Get(prefix) |
| 65 | if err != nil { |
| 66 | version = []byte{0x00} |
| 67 | } |
| 68 | |
| 69 | if version[0] == 0x01 { |
| 70 | //test if genesis block in db |
| 71 | genesis, err := self.db.Get([]byte{byte(SYS_GENESIS_BLOCK)}) |
| 72 | if err != nil { |
| 73 | self.bestBlockHeader = nil |
| 74 | self.genesisBlock = nil |
| 75 | return nil |
| 76 | } |
| 77 | |
| 78 | self.genesisBlock, err = types.BlockFromRawBytes(genesis) |
| 79 | if err != nil { |
| 80 | return errors.New(fmt.Sprint("inconsist db: genesis block deserialize failed. cause of:\n ", err.Error())) |
| 81 | } |
| 82 | |
| 83 | best, err := self.db.Get([]byte{byte(SYS_BEST_BLOCK_HEADER)}) |
| 84 | if err != nil { |
| 85 | return errors.New("inconsist db: best blockheader not in db") |
| 86 | } |
| 87 | |
| 88 | self.bestBlockHeader, err = types.HeaderFromRawBytes(best) |
| 89 | if err != nil { |
| 90 | return errors.New(fmt.Sprint("inconsist db: best blockheader deserialize failed. cause of:\n ", err.Error())) |
| 91 | } |
| 92 | |
| 93 | return nil |
| 94 | } else { |
| 95 | self.bestBlockHeader = nil |
| 96 | self.genesisBlock = nil |
| 97 | // can not find version info |
| 98 | iter := self.db.NewIterator(nil) |
| 99 | if iter.Next() { |
| 100 | iter.Release() |
| 101 | return errors.New("not a fresh db") |
| 102 | } |
| 103 | iter.Release() |
| 104 | |
| 105 | // put version to db |
| 106 | err := self.db.Put(prefix, []byte{0x01}) |
| 107 | |
| 108 | return err |
| 109 | } |
| 110 | |
| 111 | } |
| 112 | |
| 113 | func (self *Store) GetBestBlock() (BestBlock, error) { |
| 114 | if self.bestBlockHeader == nil { |
no test coverage detected