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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package db
import (
"encoding/binary"
"io"
"github.com/syndtr/goleveldb/leveldb"
"gitlab.com/byzantine-lab/tangerine-consensus/common"
"gitlab.com/byzantine-lab/tangerine-consensus/core/crypto/dkg"
"gitlab.com/byzantine-lab/tangerine-consensus/core/types"
"github.com/byzantine-lab/go-tangerine/rlp"
)
var (
blockKeyPrefix = []byte("b-")
compactionChainTipInfoKey = []byte("cc-tip")
dkgPrivateKeyKeyPrefix = []byte("dkg-prvs")
dkgProtocolInfoKeyPrefix = []byte("dkg-protocol-info")
)
type compactionChainTipInfo struct {
Height uint64 `json:"height"`
Hash common.Hash `json:"hash"`
}
// DKGProtocolInfo DKG protocol info.
type DKGProtocolInfo struct {
ID types.NodeID
Round uint64
Threshold uint64
IDMap NodeIDToDKGID
MpkMap NodeIDToPubShares
MasterPrivateShare dkg.PrivateKeyShares
IsMasterPrivateShareEmpty bool
PrvShares dkg.PrivateKeyShares
IsPrvSharesEmpty bool
PrvSharesReceived NodeID
NodeComplained NodeID
AntiComplaintReceived NodeIDToNodeIDs
Step uint64
Reset uint64
}
type dkgPrivateKey struct {
PK dkg.PrivateKey
Reset uint64
}
// Equal compare with target DKGProtocolInfo.
func (info *DKGProtocolInfo) Equal(target *DKGProtocolInfo) bool {
if !info.ID.Equal(target.ID) ||
info.Round != target.Round ||
info.Threshold != target.Threshold ||
info.IsMasterPrivateShareEmpty != target.IsMasterPrivateShareEmpty ||
info.IsPrvSharesEmpty != target.IsPrvSharesEmpty ||
info.Step != target.Step ||
info.Reset != target.Reset ||
!info.MasterPrivateShare.Equal(&target.MasterPrivateShare) ||
!info.PrvShares.Equal(&target.PrvShares) {
return false
}
if len(info.IDMap) != len(target.IDMap) {
return false
}
for k, v := range info.IDMap {
tV, exist := target.IDMap[k]
if !exist {
return false
}
if !v.IsEqual(&tV) {
return false
}
}
if len(info.MpkMap) != len(target.MpkMap) {
return false
}
for k, v := range info.MpkMap {
tV, exist := target.MpkMap[k]
if !exist {
return false
}
if !v.Equal(tV) {
return false
}
}
if len(info.PrvSharesReceived) != len(target.PrvSharesReceived) {
return false
}
for k := range info.PrvSharesReceived {
_, exist := target.PrvSharesReceived[k]
if !exist {
return false
}
}
if len(info.NodeComplained) != len(target.NodeComplained) {
return false
}
for k := range info.NodeComplained {
_, exist := target.NodeComplained[k]
if !exist {
return false
}
}
if len(info.AntiComplaintReceived) != len(target.AntiComplaintReceived) {
return false
}
for k, v := range info.AntiComplaintReceived {
tV, exist := target.AntiComplaintReceived[k]
if !exist {
return false
}
if len(v) != len(tV) {
return false
}
for kk := range v {
_, exist := tV[kk]
if !exist {
return false
}
}
}
return true
}
// NodeIDToNodeIDs the map with NodeID to NodeIDs.
type NodeIDToNodeIDs map[types.NodeID]map[types.NodeID]struct{}
// EncodeRLP implements rlp.Encoder
func (m NodeIDToNodeIDs) EncodeRLP(w io.Writer) error {
var allBytes [][][]byte
for k, v := range m {
kBytes, err := k.MarshalText()
if err != nil {
return err
}
allBytes = append(allBytes, [][]byte{kBytes})
var vBytes [][]byte
for subK := range v {
bytes, err := subK.MarshalText()
if err != nil {
return err
}
vBytes = append(vBytes, bytes)
}
allBytes = append(allBytes, vBytes)
}
return rlp.Encode(w, allBytes)
}
// DecodeRLP implements rlp.Encoder
func (m *NodeIDToNodeIDs) DecodeRLP(s *rlp.Stream) error {
*m = make(NodeIDToNodeIDs)
var dec [][][]byte
if err := s.Decode(&dec); err != nil {
return err
}
for i := 0; i < len(dec); i += 2 {
key := types.NodeID{}
err := key.UnmarshalText(dec[i][0])
if err != nil {
return err
}
valueMap := map[types.NodeID]struct{}{}
for _, v := range dec[i+1] {
value := types.NodeID{}
err := value.UnmarshalText(v)
if err != nil {
return err
}
valueMap[value] = struct{}{}
}
(*m)[key] = valueMap
}
return nil
}
// NodeID the map with NodeID.
type NodeID map[types.NodeID]struct{}
// EncodeRLP implements rlp.Encoder
func (m NodeID) EncodeRLP(w io.Writer) error {
var allBytes [][]byte
for k := range m {
kBytes, err := k.MarshalText()
if err != nil {
return err
}
allBytes = append(allBytes, kBytes)
}
return rlp.Encode(w, allBytes)
}
// DecodeRLP implements rlp.Encoder
func (m *NodeID) DecodeRLP(s *rlp.Stream) error {
*m = make(NodeID)
var dec [][]byte
if err := s.Decode(&dec); err != nil {
return err
}
for i := 0; i < len(dec); i++ {
key := types.NodeID{}
err := key.UnmarshalText(dec[i])
if err != nil {
return err
}
(*m)[key] = struct{}{}
}
return nil
}
// NodeIDToPubShares the map with NodeID to PublicKeyShares.
type NodeIDToPubShares map[types.NodeID]*dkg.PublicKeyShares
// EncodeRLP implements rlp.Encoder
func (m NodeIDToPubShares) EncodeRLP(w io.Writer) error {
var allBytes [][]byte
for k, v := range m {
kBytes, err := k.MarshalText()
if err != nil {
return err
}
allBytes = append(allBytes, kBytes)
bytes, err := rlp.EncodeToBytes(v)
if err != nil {
return err
}
allBytes = append(allBytes, bytes)
}
return rlp.Encode(w, allBytes)
}
// DecodeRLP implements rlp.Encoder
func (m *NodeIDToPubShares) DecodeRLP(s *rlp.Stream) error {
*m = make(NodeIDToPubShares)
var dec [][]byte
if err := s.Decode(&dec); err != nil {
return err
}
for i := 0; i < len(dec); i += 2 {
key := types.NodeID{}
err := key.UnmarshalText(dec[i])
if err != nil {
return err
}
value := dkg.PublicKeyShares{}
err = rlp.DecodeBytes(dec[i+1], &value)
if err != nil {
return err
}
(*m)[key] = &value
}
return nil
}
// NodeIDToDKGID the map with NodeID to DKGID.
type NodeIDToDKGID map[types.NodeID]dkg.ID
// EncodeRLP implements rlp.Encoder
func (m NodeIDToDKGID) EncodeRLP(w io.Writer) error {
var allBytes [][]byte
for k, v := range m {
kBytes, err := k.MarshalText()
if err != nil {
return err
}
allBytes = append(allBytes, kBytes)
allBytes = append(allBytes, v.GetLittleEndian())
}
return rlp.Encode(w, allBytes)
}
// DecodeRLP implements rlp.Encoder
func (m *NodeIDToDKGID) DecodeRLP(s *rlp.Stream) error {
*m = make(NodeIDToDKGID)
var dec [][]byte
if err := s.Decode(&dec); err != nil {
return err
}
for i := 0; i < len(dec); i += 2 {
key := types.NodeID{}
err := key.UnmarshalText(dec[i])
if err != nil {
return err
}
value := dkg.ID{}
err = value.SetLittleEndian(dec[i+1])
if err != nil {
return err
}
(*m)[key] = value
}
return nil
}
// LevelDBBackedDB is a leveldb backed DB implementation.
type LevelDBBackedDB struct {
db *leveldb.DB
}
// NewLevelDBBackedDB initialize a leveldb-backed database.
func NewLevelDBBackedDB(
path string) (lvl *LevelDBBackedDB, err error) {
dbInst, err := leveldb.OpenFile(path, nil)
if err != nil {
return
}
lvl = &LevelDBBackedDB{db: dbInst}
return
}
// Close implement Closer interface, which would release allocated resource.
func (lvl *LevelDBBackedDB) Close() error {
return lvl.db.Close()
}
// HasBlock implements the Reader.Has method.
func (lvl *LevelDBBackedDB) HasBlock(hash common.Hash) bool {
exists, err := lvl.internalHasBlock(lvl.getBlockKey(hash))
if err != nil {
panic(err)
}
return exists
}
func (lvl *LevelDBBackedDB) internalHasBlock(key []byte) (bool, error) {
return lvl.db.Has(key, nil)
}
// GetBlock implements the Reader.GetBlock method.
func (lvl *LevelDBBackedDB) GetBlock(
hash common.Hash) (block types.Block, err error) {
queried, err := lvl.db.Get(lvl.getBlockKey(hash), nil)
if err != nil {
if err == leveldb.ErrNotFound {
err = ErrBlockDoesNotExist
}
return
}
err = rlp.DecodeBytes(queried, &block)
return
}
// UpdateBlock implements the Writer.UpdateBlock method.
func (lvl *LevelDBBackedDB) UpdateBlock(block types.Block) (err error) {
// NOTE: we didn't handle changes of block hash (and it
// should not happen).
marshaled, err := rlp.EncodeToBytes(&block)
if err != nil {
return
}
blockKey := lvl.getBlockKey(block.Hash)
exists, err := lvl.internalHasBlock(blockKey)
if err != nil {
return
}
if !exists {
err = ErrBlockDoesNotExist
return
}
err = lvl.db.Put(blockKey, marshaled, nil)
return
}
// PutBlock implements the Writer.PutBlock method.
func (lvl *LevelDBBackedDB) PutBlock(block types.Block) (err error) {
marshaled, err := rlp.EncodeToBytes(&block)
if err != nil {
return
}
blockKey := lvl.getBlockKey(block.Hash)
exists, err := lvl.internalHasBlock(blockKey)
if err != nil {
return
}
if exists {
err = ErrBlockExists
return
}
err = lvl.db.Put(blockKey, marshaled, nil)
return
}
// GetAllBlocks implements Reader.GetAllBlocks method, which allows callers
// to retrieve all blocks in DB.
func (lvl *LevelDBBackedDB) GetAllBlocks() (BlockIterator, error) {
return nil, ErrNotImplemented
}
// PutCompactionChainTipInfo saves tip of compaction chain into the database.
func (lvl *LevelDBBackedDB) PutCompactionChainTipInfo(
blockHash common.Hash, height uint64) error {
marshaled, err := rlp.EncodeToBytes(&compactionChainTipInfo{
Hash: blockHash,
Height: height,
})
if err != nil {
return err
}
// Check current cached tip info to make sure the one to be updated is
// valid.
info, err := lvl.internalGetCompactionChainTipInfo()
if err != nil {
return err
}
if info.Height+1 != height {
return ErrInvalidCompactionChainTipHeight
}
return lvl.db.Put(compactionChainTipInfoKey, marshaled, nil)
}
func (lvl *LevelDBBackedDB) internalGetCompactionChainTipInfo() (
info compactionChainTipInfo, err error) {
queried, err := lvl.db.Get(compactionChainTipInfoKey, nil)
if err != nil {
if err == leveldb.ErrNotFound {
err = nil
}
return
}
err = rlp.DecodeBytes(queried, &info)
return
}
// GetCompactionChainTipInfo get the tip info of compaction chain into the
// database.
func (lvl *LevelDBBackedDB) GetCompactionChainTipInfo() (
hash common.Hash, height uint64) {
info, err := lvl.internalGetCompactionChainTipInfo()
if err != nil {
panic(err)
}
hash, height = info.Hash, info.Height
return
}
// GetDKGPrivateKey get DKG private key of one round.
func (lvl *LevelDBBackedDB) GetDKGPrivateKey(round, reset uint64) (
prv dkg.PrivateKey, err error) {
queried, err := lvl.db.Get(lvl.getDKGPrivateKeyKey(round), nil)
if err != nil {
if err == leveldb.ErrNotFound {
err = ErrDKGPrivateKeyDoesNotExist
}
return
}
pk := dkgPrivateKey{}
err = rlp.DecodeBytes(queried, &pk)
if pk.Reset != reset {
err = ErrDKGPrivateKeyDoesNotExist
return
}
prv = pk.PK
return
}
// PutDKGPrivateKey save DKG private key of one round.
func (lvl *LevelDBBackedDB) PutDKGPrivateKey(
round, reset uint64, prv dkg.PrivateKey) error {
// Check existence.
_, err := lvl.GetDKGPrivateKey(round, reset)
if err == nil {
return ErrDKGPrivateKeyExists
}
if err != ErrDKGPrivateKeyDoesNotExist {
return err
}
pk := &dkgPrivateKey{
PK: prv,
Reset: reset,
}
marshaled, err := rlp.EncodeToBytes(&pk)
if err != nil {
return err
}
return lvl.db.Put(
lvl.getDKGPrivateKeyKey(round), marshaled, nil)
}
// GetDKGProtocol get DKG protocol.
func (lvl *LevelDBBackedDB) GetDKGProtocol() (
info DKGProtocolInfo, err error) {
queried, err := lvl.db.Get(lvl.getDKGProtocolInfoKey(), nil)
if err != nil {
if err == leveldb.ErrNotFound {
err = ErrDKGProtocolDoesNotExist
}
return
}
err = rlp.DecodeBytes(queried, &info)
return
}
// PutOrUpdateDKGProtocol save DKG protocol.
func (lvl *LevelDBBackedDB) PutOrUpdateDKGProtocol(info DKGProtocolInfo) error {
marshaled, err := rlp.EncodeToBytes(&info)
if err != nil {
return err
}
return lvl.db.Put(lvl.getDKGProtocolInfoKey(), marshaled, nil)
}
func (lvl *LevelDBBackedDB) getBlockKey(hash common.Hash) (ret []byte) {
ret = make([]byte, len(blockKeyPrefix)+len(hash[:]))
copy(ret, blockKeyPrefix)
copy(ret[len(blockKeyPrefix):], hash[:])
return
}
func (lvl *LevelDBBackedDB) getDKGPrivateKeyKey(
round uint64) (ret []byte) {
ret = make([]byte, len(dkgPrivateKeyKeyPrefix)+8)
copy(ret, dkgPrivateKeyKeyPrefix)
binary.LittleEndian.PutUint64(
ret[len(dkgPrivateKeyKeyPrefix):], round)
return
}
func (lvl *LevelDBBackedDB) getDKGProtocolInfoKey() (ret []byte) {
ret = make([]byte, len(dkgProtocolInfoKeyPrefix)+8)
copy(ret, dkgProtocolInfoKeyPrefix)
return
}
|