1 files changed, 0 insertions, 114 deletions

diff --git a/p2p/discover/node.go b/p2p/discover/node.go
index 0ec9630d3..e66ca37a4 100644
--- a/p2p/discover/node.go
+++ b/p2p/discover/node.go
@@ -1,10 +1,8 @@
 package discover
 
 import (
-	"bytes"
 	"crypto/ecdsa"
 	"crypto/elliptic"
-	"encoding/binary"
 	"encoding/hex"
 	"errors"
 	"fmt"
@@ -13,16 +11,12 @@ import (
 	"math/rand"
 	"net"
 	"net/url"
-	"os"
 	"strconv"
 	"strings"
 
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/crypto/secp256k1"
 	"github.com/ethereum/go-ethereum/rlp"
-	"github.com/syndtr/goleveldb/leveldb"
-	"github.com/syndtr/goleveldb/leveldb/opt"
-	"github.com/syndtr/goleveldb/leveldb/storage"
 )
 
 const nodeIDBits = 512
@@ -310,111 +304,3 @@ func randomID(a NodeID, n int) (b NodeID) {
 	}
 	return b
 }
-
-// nodeDB stores all nodes we know about.
-type nodeDB struct {
-	ldb *leveldb.DB
-}
-
-var dbVersionKey = []byte("pv")
-
-// Opens the backing LevelDB. If path is "", we use an in-memory database.
-func newNodeDB(path string, version int64) (db *nodeDB, err error) {
-	db = new(nodeDB)
-	opts := new(opt.Options)
-	if path == "" {
-		db.ldb, err = leveldb.Open(storage.NewMemStorage(), opts)
-	} else {
-		db.ldb, err = openNodeDB(path, opts, version)
-	}
-	return db, err
-}
-
-// openNodeDB opens a persistent seed cache, flushing old versions.
-func openNodeDB(path string, opts *opt.Options, version int64) (*leveldb.DB, error) {
-	ldb, err := leveldb.OpenFile(path, opts)
-	if _, iscorrupted := err.(leveldb.ErrCorrupted); iscorrupted {
-		ldb, err = leveldb.RecoverFile(path, opts)
-	}
-	if err != nil {
-		return nil, err
-	}
-	// The nodes contained in the database correspond to a certain
-	// protocol version. Flush all nodes if the DB version doesn't match.
-	// There is no need to do this for memory databases because they
-	// won't ever be used with a different protocol version.
-	shouldVal := make([]byte, binary.MaxVarintLen64)
-	shouldVal = shouldVal[:binary.PutVarint(shouldVal, version)]
-	val, err := ldb.Get(dbVersionKey, nil)
-	if err == leveldb.ErrNotFound {
-		err = ldb.Put(dbVersionKey, shouldVal, nil)
-	} else if err == nil && !bytes.Equal(val, shouldVal) {
-		// Delete and start over.
-		ldb.Close()
-		if err = os.RemoveAll(path); err != nil {
-			return nil, err
-		}
-		return openNodeDB(path, opts, version)
-	}
-	if err != nil {
-		ldb.Close()
-		ldb = nil
-	}
-	return ldb, err
-}
-
-// get retrieves a node with a given id from the seed da
-func (db *nodeDB) get(id NodeID) *Node {
-	v, err := db.ldb.Get(id[:], nil)
-	if err != nil {
-		return nil
-	}
-	n := new(Node)
-	if err := rlp.DecodeBytes(v, n); err != nil {
-		return nil
-	}
-	return n
-}
-
-// list retrieves a batch of nodes from the database.
-func (db *nodeDB) list(n int) []*Node {
-	it := db.ldb.NewIterator(nil, nil)
-	defer it.Release()
-
-	nodes := make([]*Node, 0, n)
-	for i := 0; i < n && it.Next(); i++ {
-		var id NodeID
-		copy(id[:], it.Key())
-
-		if node := db.get(id); node != nil {
-			nodes = append(nodes, node)
-		}
-	}
-	return nodes
-}
-
-// update inserts - potentially overwriting - a node in the seed database.
-func (db *nodeDB) update(n *Node) error {
-	v, err := rlp.EncodeToBytes(n)
-	if err != nil {
-		return err
-	}
-	return db.ldb.Put(n.ID[:], v, nil)
-}
-
-// add inserts a new node into the seed database.
-func (db *nodeDB) add(id NodeID, addr *net.UDPAddr, tcpPort uint16) *Node {
-	n := &Node{ID: id, IP: addr.IP, DiscPort: addr.Port, TCPPort: int(tcpPort)}
-	db.update(n)
-	return n
-}
-
-// delete removes a node from the database.
-func (db *nodeDB) delete(id NodeID) error {
-	return db.ldb.Delete(id[:], nil)
-}
-
-// close flushes and closes the database files.
-func (db *nodeDB) close() {
-	db.ldb.Close()
-}