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