package ethdb import ( "fmt" "path" "github.com/ethereum/go-ethereum/compression/rle" "github.com/ethereum/go-ethereum/ethutil" "github.com/syndtr/goleveldb/leveldb" "github.com/syndtr/goleveldb/leveldb/iterator" ) type LDBDatabase struct { db *leveldb.DB comp bool } func NewLDBDatabase(name string) (*LDBDatabase, error) { dbPath := path.Join(ethutil.Config.ExecPath, name) // Open the db db, err := leveldb.OpenFile(dbPath, nil) if err != nil { return nil, err } database := &LDBDatabase{db: db, comp: true} return database, nil } func (self *LDBDatabase) Put(key []byte, value []byte) { if self.comp { value = rle.Compress(value) } err := self.db.Put(key, value, nil) if err != nil { fmt.Println("Error put", err) } } func (self *LDBDatabase) Get(key []byte) ([]byte, error) { dat, err := self.db.Get(key, nil) if err != nil { return nil, err } if self.comp { return rle.Decompress(dat) } return dat, nil } func (self *LDBDatabase) Delete(key []byte) error { return self.db.Delete(key, nil) } func (self *LDBDatabase) LastKnownTD() []byte { data, _ := self.Get([]byte("LTD")) if len(data) == 0 { data = []byte{0x0} } return data } func (self *LDBDatabase) NewIterator() iterator.Iterator { return self.db.NewIterator(nil, nil) } func (self *LDBDatabase) Write(batch *leveldb.Batch) error { return self.db.Write(batch, nil) } func (self *LDBDatabase) Close() { // Close the leveldb database self.db.Close() } func (self *LDBDatabase) Print() { iter := self.db.NewIterator(nil, nil) for iter.Next() { key := iter.Key() value := iter.Value() fmt.Printf("%x(%d): ", key, len(key)) node := ethutil.NewValueFromBytes(value) fmt.Printf("%v\n", node) } }