package ethdb
import (
"fmt"
"github.com/ethereum/eth-go/ethutil"
"github.com/syndtr/goleveldb/leveldb"
"path"
)
type LDBDatabase struct {
db *leveldb.DB
}
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}
return database, nil
}
func (db *LDBDatabase) Put(key []byte, value []byte) {
err := db.db.Put(key, value, nil)
if err != nil {
fmt.Println("Error put", err)
}
}
func (db *LDBDatabase) Get(key []byte) ([]byte, error) {
return db.db.Get(key, nil)
}
func (db *LDBDatabase) Delete(key []byte) error {
return db.db.Delete(key, nil)
}
func (db *LDBDatabase) Db() *leveldb.DB {
return db.db
}
func (db *LDBDatabase) LastKnownTD() []byte {
data, _ := db.db.Get([]byte("LastKnownTotalDifficulty"), nil)
if len(data) == 0 {
data = []byte{0x0}
}
return data
}
func (db *LDBDatabase) Close() {
// Close the leveldb database
db.db.Close()
}
func (db *LDBDatabase) Print() {
iter := db.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)
}
}
