level db back in

ethereum.go

@@ -58,8 +58,8 @@ type Ethereum struct {
 }
 
 func New(caps Caps, usePnp bool) (*Ethereum, error) {
-	//db, err := ethdb.NewLDBDatabase()
+	db, err := ethdb.NewLDBDatabase()
-	db, err := ethdb.NewMemDatabase()
+	//db, err := ethdb.NewMemDatabase()
 	if err != nil {
 		return nil, err
 	}