core: check reset of dkg types when adding (#268)

* vendor: sync to latest core

* core: check dkg reset

8 files changed, 195 insertions, 54 deletions

diff --git a/core/vm/oracle_contracts.go b/core/vm/oracle_contracts.go
index 56e82f7df..e58133990 100644
--- a/core/vm/oracle_contracts.go
+++ b/core/vm/oracle_contracts.go
@@ -1242,6 +1242,10 @@ func (g *GovernanceContract) addDKGComplaint(round *big.Int, comp []byte) ([]byt
 		return g.penalize()
 	}
 
+	if dkgComplaint.Reset != g.state.DKGResetCount(round).Uint64() {
+		return g.penalize()
+	}
+
 	// DKGComplaint must belongs to someone in DKG set.
 	if !g.inDKGSet(round, dkgComplaint.ProposerID) {
 		return g.penalize()
@@ -1324,6 +1328,10 @@ func (g *GovernanceContract) addDKGMasterPublicKey(round *big.Int, mpk []byte) (
 		return g.penalize()
 	}
 
+	if dkgMasterPK.Reset != g.state.DKGResetCount(round).Uint64() {
+		return g.penalize()
+	}
+
 	// DKGMasterPublicKey must belongs to someone in DKG set.
 	if !g.inDKGSet(round, dkgMasterPK.ProposerID) {
 		return g.penalize()
@@ -1350,6 +1358,10 @@ func (g *GovernanceContract) addDKGMPKReady(round *big.Int, ready []byte) ([]byt
 		return g.penalize()
 	}
 
+	if dkgReady.Reset != g.state.DKGResetCount(round).Uint64() {
+		return g.penalize()
+	}
+
 	// DKGFInalize must belongs to someone in DKG set.
 	if !g.inDKGSet(round, dkgReady.ProposerID) {
 		return g.penalize()
@@ -1380,6 +1392,10 @@ func (g *GovernanceContract) addDKGFinalize(round *big.Int, finalize []byte) ([]
 		return g.penalize()
 	}
 
+	if dkgFinalize.Reset != g.state.DKGResetCount(round).Uint64() {
+		return g.penalize()
+	}
+
 	// DKGFInalize must belongs to someone in DKG set.
 	if !g.inDKGSet(round, dkgFinalize.ProposerID) {
 		return g.penalize()
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus/core/configuration-chain.go b/vendor/github.com/dexon-foundation/dexon-consensus/core/configuration-chain.go
index 9214cd97d..5c3226053 100644
--- a/vendor/github.com/dexon-foundation/dexon-consensus/core/configuration-chain.go
+++ b/vendor/github.com/dexon-foundation/dexon-consensus/core/configuration-chain.go
@@ -86,7 +86,7 @@ func newConfigurationChain(
 	}
 }
 
-func (cc *configurationChain) registerDKG(round uint64, threshold int) {
+func (cc *configurationChain) registerDKG(round, reset uint64, threshold int) {
 	cc.dkgLock.Lock()
 	defer cc.dkgLock.Unlock()
 	if cc.dkg != nil {
@@ -105,7 +105,9 @@ func (cc *configurationChain) registerDKG(round uint64, threshold int) {
 		cc.ID,
 		cc.recv,
 		round,
+		reset,
 		threshold)
+	// TODO(mission): should keep DKG resetCount along with DKG private share.
 	err = cc.db.PutOrUpdateDKGMasterPrivateShares(round, *cc.dkg.prvShares)
 	if err != nil {
 		cc.logger.Error("Error put or update DKG master private shares", "error",
@@ -122,20 +124,22 @@ func (cc *configurationChain) registerDKG(round uint64, threshold int) {
 	}()
 }
 
-func (cc *configurationChain) runDKG(round uint64) error {
+func (cc *configurationChain) runDKG(round, reset uint64) error {
 	// Check if corresponding DKG signer is ready.
 	if _, _, err := cc.getDKGInfo(round); err == nil {
 		return nil
 	}
 	cc.dkgLock.Lock()
 	defer cc.dkgLock.Unlock()
-	if cc.dkg == nil || cc.dkg.round != round {
-		if cc.dkg != nil && cc.dkg.round > round {
-			cc.logger.Warn("DKG canceled", "round", round)
-			return nil
-		}
+	if cc.dkg == nil ||
+		cc.dkg.round < round ||
+		(cc.dkg.round == round && cc.dkg.reset < reset) {
 		return ErrDKGNotRegistered
 	}
+	if cc.dkg.round != round || cc.dkg.reset != reset {
+		cc.logger.Warn("DKG canceled", "round", round, "reset", reset)
+		return nil
+	}
 	cc.logger.Debug("Calling Governance.IsDKGFinal", "round", round)
 	if cc.gov.IsDKGFinal(round) {
 		cc.logger.Warn("DKG already final", "round", round)
@@ -144,7 +148,9 @@ func (cc *configurationChain) runDKG(round uint64) error {
 	cc.logger.Debug("Calling Governance.IsDKGMPKReady", "round", round)
 	for !cc.gov.IsDKGMPKReady(round) {
 		cc.logger.Debug("DKG MPKs are not ready yet. Try again later...",
-			"nodeID", cc.ID)
+			"nodeID", cc.ID.String()[:6],
+			"round", round,
+			"reset", reset)
 		cc.dkgLock.Unlock()
 		time.Sleep(500 * time.Millisecond)
 		cc.dkgLock.Lock()
@@ -165,18 +171,24 @@ func (cc *configurationChain) runDKG(round uint64) error {
 		}
 	}
 	if !inProtocol {
-		cc.logger.Warn("Failed to join DKG protocol", "round", round)
+		cc.logger.Warn("Failed to join DKG protocol",
+			"round", round,
+			"reset", reset)
 		return nil
 	}
 	// Phase 2(T = 0): Exchange DKG secret key share.
 	if err := cc.dkg.processMasterPublicKeys(mpks); err != nil {
 		cc.logger.Error("Failed to process master public key",
+			"round", round,
+			"reset", reset,
 			"error", err)
 	}
 	cc.mpkReady = true
 	for _, prvShare := range cc.pendingPrvShare {
 		if err := cc.dkg.processPrivateShare(prvShare); err != nil {
 			cc.logger.Error("Failed to process private share",
+				"round", round,
+				"reset", reset,
 				"error", err)
 		}
 	}
@@ -195,6 +207,8 @@ func (cc *configurationChain) runDKG(round uint64) error {
 	complaints := cc.gov.DKGComplaints(round)
 	if err := cc.dkg.processNackComplaints(complaints); err != nil {
 		cc.logger.Error("Failed to process NackComplaint",
+			"round", round,
+			"reset", reset,
 			"error", err)
 	}
 	cc.dkgLock.Unlock()
@@ -222,7 +236,9 @@ func (cc *configurationChain) runDKG(round uint64) error {
 	cc.logger.Debug("Calling Governance.IsDKGFinal", "round", round)
 	for !cc.gov.IsDKGFinal(round) {
 		cc.logger.Debug("DKG is not ready yet. Try again later...",
-			"nodeID", cc.ID)
+			"nodeID", cc.ID.String()[:6],
+			"round", round,
+			"reset", reset)
 		time.Sleep(500 * time.Millisecond)
 	}
 	cc.logger.Debug("Calling Governance.DKGMasterPublicKeys", "round", round)
@@ -241,10 +257,13 @@ func (cc *configurationChain) runDKG(round uint64) error {
 	cc.logger.Info("Qualify Nodes",
 		"nodeID", cc.ID,
 		"round", round,
+		"reset", reset,
 		"count", len(npks.QualifyIDs),
 		"qualifies", qualifies)
 	if _, exist := npks.QualifyNodeIDs[cc.ID]; !exist {
-		cc.logger.Warn("Self is not in Qualify Nodes")
+		cc.logger.Warn("Self is not in Qualify Nodes",
+			"round", round,
+			"reset", reset)
 		return nil
 	}
 	signer, err := cc.dkg.recoverShareSecret(npks.QualifyIDs)
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus/core/consensus.go b/vendor/github.com/dexon-foundation/dexon-consensus/core/consensus.go
index 8529e4031..e0a6753a9 100644
--- a/vendor/github.com/dexon-foundation/dexon-consensus/core/consensus.go
+++ b/vendor/github.com/dexon-foundation/dexon-consensus/core/consensus.go
@@ -740,7 +740,7 @@ func (con *Consensus) prepare(
 			con.logger.Info("Selected as DKG set", "round", nextRound)
 			nextConfig := utils.GetConfigWithPanic(con.gov, nextRound,
 				con.logger)
-			con.cfgModule.registerDKG(nextRound, utils.GetDKGThreshold(
+			con.cfgModule.registerDKG(nextRound, e.Reset, utils.GetDKGThreshold(
 				nextConfig))
 			con.event.RegisterHeight(e.NextDKGPreparationHeight(),
 				func(uint64) {
@@ -749,7 +749,7 @@ func (con *Consensus) prepare(
 						defer con.dkgReady.L.Unlock()
 						con.dkgRunning = 0
 					}()
-					con.runDKG(nextRound, nextConfig)
+					con.runDKG(nextRound, e.Reset, nextConfig)
 				})
 		})
 	})
@@ -805,7 +805,7 @@ func (con *Consensus) Run() {
 }
 
 // runDKG starts running DKG protocol.
-func (con *Consensus) runDKG(round uint64, config *types.Config) {
+func (con *Consensus) runDKG(round, reset uint64, config *types.Config) {
 	con.dkgReady.L.Lock()
 	defer con.dkgReady.L.Unlock()
 	if con.dkgRunning != 0 {
@@ -819,7 +819,7 @@ func (con *Consensus) runDKG(round uint64, config *types.Config) {
 			con.dkgReady.Broadcast()
 			con.dkgRunning = 2
 		}()
-		if err := con.cfgModule.runDKG(round); err != nil {
+		if err := con.cfgModule.runDKG(round, reset); err != nil {
 			con.logger.Error("Failed to runDKG", "error", err)
 		}
 	}()
@@ -841,8 +841,7 @@ func (con *Consensus) runCRS(round uint64, hash common.Hash) {
 			"hash", psig.Hash)
 		con.network.BroadcastDKGPartialSignature(psig)
 		con.logger.Debug("Calling Governance.CRS", "round", round)
-		crs, err := con.cfgModule.runCRSTSig(
-			round, utils.GetCRSWithPanic(con.gov, round, con.logger))
+		crs, err := con.cfgModule.runCRSTSig(round, hash)
 		if err != nil {
 			con.logger.Error("Failed to run CRS Tsig", "error", err)
 		} else {
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus/core/dkg-tsig-protocol.go b/vendor/github.com/dexon-foundation/dexon-consensus/core/dkg-tsig-protocol.go
index 259d07a4b..82da6dc20 100644
--- a/vendor/github.com/dexon-foundation/dexon-consensus/core/dkg-tsig-protocol.go
+++ b/vendor/github.com/dexon-foundation/dexon-consensus/core/dkg-tsig-protocol.go
@@ -60,6 +60,30 @@ var (
 		"self privateShare does not match mpk registered")
 )
 
+// ErrUnexpectedDKGResetCount represents receiving a DKG message with unexpected
+// DKG reset count.
+type ErrUnexpectedDKGResetCount struct {
+	expect, actual uint64
+	proposerID     types.NodeID
+}
+
+func (e ErrUnexpectedDKGResetCount) Error() string {
+	return fmt.Sprintf(
+		"unexpected DKG reset count, from:%s expect:%d actual:%d",
+		e.proposerID.String()[:6], e.expect, e.actual)
+}
+
+// ErrUnexpectedRound represents receiving a DKG message with unexpected round.
+type ErrUnexpectedRound struct {
+	expect, actual uint64
+	proposerID     types.NodeID
+}
+
+func (e ErrUnexpectedRound) Error() string {
+	return fmt.Sprintf("unexpected round, from:%s expect:%d actual:%d",
+		e.proposerID.String()[:6], e.expect, e.actual)
+}
+
 type dkgReceiver interface {
 	// ProposeDKGComplaint proposes a DKGComplaint.
 	ProposeDKGComplaint(complaint *typesDKG.Complaint)
@@ -84,6 +108,7 @@ type dkgProtocol struct {
 	ID                 types.NodeID
 	recv               dkgReceiver
 	round              uint64
+	reset              uint64
 	threshold          int
 	idMap              map[types.NodeID]dkg.ID
 	mpkMap             map[types.NodeID]*dkg.PublicKeyShares
@@ -140,12 +165,14 @@ func newDKGProtocol(
 	ID types.NodeID,
 	recv dkgReceiver,
 	round uint64,
+	reset uint64,
 	threshold int) *dkgProtocol {
 
 	prvShare, pubShare := dkg.NewPrivateKeyShares(threshold)
 
 	recv.ProposeDKGMasterPublicKey(&typesDKG.MasterPublicKey{
 		Round:           round,
+		Reset:           reset,
 		DKGID:           typesDKG.NewID(ID),
 		PublicKeyShares: *pubShare,
 	})
@@ -154,6 +181,7 @@ func newDKGProtocol(
 		ID:                    ID,
 		recv:                  recv,
 		round:                 round,
+		reset:                 reset,
 		threshold:             threshold,
 		idMap:                 make(map[types.NodeID]dkg.ID),
 		mpkMap:                make(map[types.NodeID]*dkg.PublicKeyShares),
@@ -176,13 +204,17 @@ func recoverDKGProtocol(
 		if err == db.ErrDKGMasterPrivateSharesDoesNotExist {
 			return nil, nil
 		}
-
 		return nil, err
 	}
+	// TODO(mission): taken resetCount into consideration, we should keep
+	//                reset count of private shares from DB, and use it to init
+	//                DKG protocol instance.
+	reset := uint64(0)
 	return &dkgProtocol{
 		ID:                    ID,
 		recv:                  recv,
 		round:                 round,
+		reset:                 reset,
 		threshold:             threshold,
 		idMap:                 make(map[types.NodeID]dkg.ID),
 		mpkMap:                make(map[types.NodeID]*dkg.PublicKeyShares),
@@ -201,6 +233,13 @@ func (d *dkgProtocol) processMasterPublicKeys(
 	d.prvSharesReceived = make(map[types.NodeID]struct{}, len(mpks))
 	ids := make(dkg.IDs, len(mpks))
 	for i := range mpks {
+		if mpks[i].Reset != d.reset {
+			return ErrUnexpectedDKGResetCount{
+				expect:     d.reset,
+				actual:     mpks[i].Reset,
+				proposerID: mpks[i].ProposerID,
+			}
+		}
 		nID := mpks[i].ProposerID
 		d.idMap[nID] = mpks[i].DKGID
 		d.mpkMap[nID] = &mpks[i].PublicKeyShares
@@ -219,6 +258,7 @@ func (d *dkgProtocol) processMasterPublicKeys(
 		d.recv.ProposeDKGPrivateShare(&typesDKG.PrivateShare{
 			ReceiverID:   mpk.ProposerID,
 			Round:        d.round,
+			Reset:        d.reset,
 			PrivateShare: *share,
 		})
 	}
@@ -252,9 +292,11 @@ func (d *dkgProtocol) proposeNackComplaints() {
 		}
 		d.recv.ProposeDKGComplaint(&typesDKG.Complaint{
 			Round: d.round,
+			Reset: d.reset,
 			PrivateShare: typesDKG.PrivateShare{
 				ProposerID: nID,
 				Round:      d.round,
+				Reset:      d.reset,
 			},
 		})
 	}
@@ -269,6 +311,9 @@ func (d *dkgProtocol) processNackComplaints(complaints []*typesDKG.Complaint) (
 		if !complaint.IsNack() {
 			continue
 		}
+		if complaint.Reset != d.reset {
+			continue
+		}
 		if complaint.PrivateShare.ProposerID != d.ID {
 			continue
 		}
@@ -286,6 +331,7 @@ func (d *dkgProtocol) processNackComplaints(complaints []*typesDKG.Complaint) (
 			ProposerID:   d.ID,
 			ReceiverID:   complaint.ProposerID,
 			Round:        d.round,
+			Reset:        d.reset,
 			PrivateShare: *share,
 		})
 	}
@@ -297,6 +343,9 @@ func (d *dkgProtocol) enforceNackComplaints(complaints []*typesDKG.Complaint) {
 		if !complaint.IsNack() {
 			continue
 		}
+		if complaint.Reset != d.reset {
+			continue
+		}
 		to := complaint.PrivateShare.ProposerID
 		// Do not propose nack complaint to itself.
 		if to == d.ID {
@@ -311,9 +360,11 @@ func (d *dkgProtocol) enforceNackComplaints(complaints []*typesDKG.Complaint) {
 			d.antiComplaintReceived[from][to]; !exist {
 			d.recv.ProposeDKGComplaint(&typesDKG.Complaint{
 				Round: d.round,
+				Reset: d.reset,
 				PrivateShare: typesDKG.PrivateShare{
 					ProposerID: to,
 					Round:      d.round,
+					Reset:      d.reset,
 				},
 			})
 		}
@@ -321,6 +372,20 @@ func (d *dkgProtocol) enforceNackComplaints(complaints []*typesDKG.Complaint) {
 }
 
 func (d *dkgProtocol) sanityCheck(prvShare *typesDKG.PrivateShare) error {
+	if d.round != prvShare.Round {
+		return ErrUnexpectedRound{
+			expect:     d.round,
+			actual:     prvShare.Round,
+			proposerID: prvShare.ProposerID,
+		}
+	}
+	if d.reset != prvShare.Reset {
+		return ErrUnexpectedDKGResetCount{
+			expect:     d.reset,
+			actual:     prvShare.Reset,
+			proposerID: prvShare.ProposerID,
+		}
+	}
 	if _, exist := d.idMap[prvShare.ProposerID]; !exist {
 		return ErrNotDKGParticipant
 	}
@@ -336,9 +401,6 @@ func (d *dkgProtocol) sanityCheck(prvShare *typesDKG.PrivateShare) error {
 
 func (d *dkgProtocol) processPrivateShare(
 	prvShare *typesDKG.PrivateShare) error {
-	if d.round != prvShare.Round {
-		return nil
-	}
 	receiverID, exist := d.idMap[prvShare.ReceiverID]
 	// This node is not a DKG participant, ignore the private share.
 	if !exist {
@@ -361,6 +423,7 @@ func (d *dkgProtocol) processPrivateShare(
 		}
 		complaint := &typesDKG.Complaint{
 			Round:        d.round,
+			Reset:        d.reset,
 			PrivateShare: *prvShare,
 		}
 		d.nodeComplained[prvShare.ProposerID] = struct{}{}
@@ -387,6 +450,7 @@ func (d *dkgProtocol) proposeMPKReady() {
 	d.recv.ProposeDKGMPKReady(&typesDKG.MPKReady{
 		ProposerID: d.ID,
 		Round:      d.round,
+		Reset:      d.reset,
 	})
 }
 
@@ -394,6 +458,7 @@ func (d *dkgProtocol) proposeFinalize() {
 	d.recv.ProposeDKGFinalize(&typesDKG.Finalize{
 		ProposerID: d.ID,
 		Round:      d.round,
+		Reset:      d.reset,
 	})
 }
 
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus/core/interfaces.go b/vendor/github.com/dexon-foundation/dexon-consensus/core/interfaces.go
index ddd6c3bb9..707563f03 100644
--- a/vendor/github.com/dexon-foundation/dexon-consensus/core/interfaces.go
+++ b/vendor/github.com/dexon-foundation/dexon-consensus/core/interfaces.go
@@ -116,6 +116,9 @@ type Governance interface {
 	// Return the genesis node set if round == 0.
 	NodeSet(round uint64) []crypto.PublicKey
 
+	// Get the begin height of a round.
+	GetRoundHeight(round uint64) uint64
+
 	//// DKG-related methods.
 
 	// AddDKGComplaint adds a DKGComplaint.
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus/core/types/dkg/dkg.go b/vendor/github.com/dexon-foundation/dexon-consensus/core/types/dkg/dkg.go
index 1052ccb9f..6572d1e9d 100644
--- a/vendor/github.com/dexon-foundation/dexon-consensus/core/types/dkg/dkg.go
+++ b/vendor/github.com/dexon-foundation/dexon-consensus/core/types/dkg/dkg.go
@@ -47,6 +47,7 @@ type PrivateShare struct {
 	ProposerID   types.NodeID         `json:"proposer_id"`
 	ReceiverID   types.NodeID         `json:"receiver_id"`
 	Round        uint64               `json:"round"`
+	Reset        uint64               `json:"reset"`
 	PrivateShare cryptoDKG.PrivateKey `json:"private_share"`
 	Signature    crypto.Signature     `json:"signature"`
 }
@@ -56,6 +57,7 @@ func (p *PrivateShare) Equal(other *PrivateShare) bool {
 	return p.ProposerID.Equal(other.ProposerID) &&
 		p.ReceiverID.Equal(other.ReceiverID) &&
 		p.Round == other.Round &&
+		p.Reset == other.Reset &&
 		p.Signature.Type == other.Signature.Type &&
 		bytes.Compare(p.Signature.Signature, other.Signature.Signature) == 0 &&
 		bytes.Compare(
@@ -66,21 +68,24 @@ func (p *PrivateShare) Equal(other *PrivateShare) bool {
 type MasterPublicKey struct {
 	ProposerID      types.NodeID              `json:"proposer_id"`
 	Round           uint64                    `json:"round"`
+	Reset           uint64                    `json:"reset"`
 	DKGID           cryptoDKG.ID              `json:"dkg_id"`
 	PublicKeyShares cryptoDKG.PublicKeyShares `json:"public_key_shares"`
 	Signature       crypto.Signature          `json:"signature"`
 }
 
 func (d *MasterPublicKey) String() string {
-	return fmt.Sprintf("MasterPublicKey{KP:%s Round:%d}",
+	return fmt.Sprintf("MasterPublicKey{KP:%s Round:%d Reset:%d}",
 		d.ProposerID.String()[:6],
-		d.Round)
+		d.Round,
+		d.Reset)
 }
 
 // Equal check equality of two DKG master public keys.
 func (d *MasterPublicKey) Equal(other *MasterPublicKey) bool {
 	return d.ProposerID.Equal(other.ProposerID) &&
 		d.Round == other.Round &&
+		d.Reset == other.Reset &&
 		d.DKGID.GetHexString() == other.DKGID.GetHexString() &&
 		d.PublicKeyShares.Equal(&other.PublicKeyShares) &&
 		d.Signature.Type == other.Signature.Type &&
@@ -90,6 +95,7 @@ func (d *MasterPublicKey) Equal(other *MasterPublicKey) bool {
 type rlpMasterPublicKey struct {
 	ProposerID      types.NodeID
 	Round           uint64
+	Reset           uint64
 	DKGID           []byte
 	PublicKeyShares *cryptoDKG.PublicKeyShares
 	Signature       crypto.Signature
@@ -100,6 +106,7 @@ func (d *MasterPublicKey) EncodeRLP(w io.Writer) error {
 	return rlp.Encode(w, rlpMasterPublicKey{
 		ProposerID:      d.ProposerID,
 		Round:           d.Round,
+		Reset:           d.Reset,
 		DKGID:           d.DKGID.GetLittleEndian(),
 		PublicKeyShares: &d.PublicKeyShares,
 		Signature:       d.Signature,
@@ -121,6 +128,7 @@ func (d *MasterPublicKey) DecodeRLP(s *rlp.Stream) error {
 	*d = MasterPublicKey{
 		ProposerID:      dec.ProposerID,
 		Round:           dec.Round,
+		Reset:           dec.Reset,
 		DKGID:           id,
 		PublicKeyShares: *dec.PublicKeyShares,
 		Signature:       dec.Signature,
@@ -146,24 +154,26 @@ func (d *MasterPublicKey) UnmarshalJSON(data []byte) error {
 type Complaint struct {
 	ProposerID   types.NodeID     `json:"proposer_id"`
 	Round        uint64           `json:"round"`
+	Reset        uint64           `json:"reset"`
 	PrivateShare PrivateShare     `json:"private_share"`
 	Signature    crypto.Signature `json:"signature"`
 }
 
 func (c *Complaint) String() string {
 	if c.IsNack() {
-		return fmt.Sprintf("DKGNackComplaint{CP:%s Round:%d PSP:%s}",
-			c.ProposerID.String()[:6], c.Round,
+		return fmt.Sprintf("DKGNackComplaint{CP:%s Round:%d Reset %d PSP:%s}",
+			c.ProposerID.String()[:6], c.Round, c.Reset,
 			c.PrivateShare.ProposerID.String()[:6])
 	}
-	return fmt.Sprintf("DKGComplaint{CP:%s Round:%d PrivateShare:%v}",
-		c.ProposerID.String()[:6], c.Round, c.PrivateShare)
+	return fmt.Sprintf("DKGComplaint{CP:%s Round:%d Reset %d PrivateShare:%v}",
+		c.ProposerID.String()[:6], c.Round, c.Reset, c.PrivateShare)
 }
 
 // Equal checks equality between two Complaint instances.
 func (c *Complaint) Equal(other *Complaint) bool {
 	return c.ProposerID.Equal(other.ProposerID) &&
 		c.Round == other.Round &&
+		c.Reset == other.Reset &&
 		c.PrivateShare.Equal(&other.PrivateShare) &&
 		c.Signature.Type == other.Signature.Type &&
 		bytes.Compare(c.Signature.Signature, other.Signature.Signature) == 0
@@ -172,6 +182,7 @@ func (c *Complaint) Equal(other *Complaint) bool {
 type rlpComplaint struct {
 	ProposerID   types.NodeID
 	Round        uint64
+	Reset        uint64
 	IsNack       bool
 	PrivateShare []byte
 	Signature    crypto.Signature
@@ -183,6 +194,7 @@ func (c *Complaint) EncodeRLP(w io.Writer) error {
 		return rlp.Encode(w, rlpComplaint{
 			ProposerID:   c.ProposerID,
 			Round:        c.Round,
+			Reset:        c.Reset,
 			IsNack:       true,
 			PrivateShare: c.PrivateShare.ProposerID.Hash[:],
 			Signature:    c.Signature,
@@ -195,6 +207,7 @@ func (c *Complaint) EncodeRLP(w io.Writer) error {
 	return rlp.Encode(w, rlpComplaint{
 		ProposerID:   c.ProposerID,
 		Round:        c.Round,
+		Reset:        c.Reset,
 		IsNack:       false,
 		PrivateShare: prvShare,
 		Signature:    c.Signature,
@@ -212,6 +225,7 @@ func (c *Complaint) DecodeRLP(s *rlp.Stream) error {
 	if dec.IsNack {
 		copy(prvShare.ProposerID.Hash[:], dec.PrivateShare)
 		prvShare.Round = dec.Round
+		prvShare.Reset = dec.Reset
 	} else {
 		if err := rlp.DecodeBytes(dec.PrivateShare, &prvShare); err != nil {
 			return err
@@ -221,6 +235,7 @@ func (c *Complaint) DecodeRLP(s *rlp.Stream) error {
 	*c = Complaint{
 		ProposerID:   dec.ProposerID,
 		Round:        dec.Round,
+		Reset:        dec.Reset,
 		PrivateShare: prvShare,
 		Signature:    dec.Signature,
 	}
@@ -240,19 +255,22 @@ type PartialSignature struct {
 type MPKReady struct {
 	ProposerID types.NodeID     `json:"proposer_id"`
 	Round      uint64           `json:"round"`
+	Reset      uint64           `json:"reset"`
 	Signature  crypto.Signature `json:"signature"`
 }
 
 func (ready *MPKReady) String() string {
-	return fmt.Sprintf("DKGMPKReady{RP:%s Round:%d}",
+	return fmt.Sprintf("DKGMPKReady{RP:%s Round:%d Reset:%d}",
 		ready.ProposerID.String()[:6],
-		ready.Round)
+		ready.Round,
+		ready.Reset)
 }
 
 // Equal check equality of two MPKReady instances.
 func (ready *MPKReady) Equal(other *MPKReady) bool {
 	return ready.ProposerID.Equal(other.ProposerID) &&
 		ready.Round == other.Round &&
+		ready.Reset == other.Reset &&
 		ready.Signature.Type == other.Signature.Type &&
 		bytes.Compare(ready.Signature.Signature, other.Signature.Signature) == 0
 }
@@ -261,19 +279,22 @@ func (ready *MPKReady) Equal(other *MPKReady) bool {
 type Finalize struct {
 	ProposerID types.NodeID     `json:"proposer_id"`
 	Round      uint64           `json:"round"`
+	Reset      uint64           `json:"reset"`
 	Signature  crypto.Signature `json:"signature"`
 }
 
 func (final *Finalize) String() string {
-	return fmt.Sprintf("DKGFinal{FP:%s Round:%d}",
+	return fmt.Sprintf("DKGFinal{FP:%s Round:%d Reset:%d}",
 		final.ProposerID.String()[:6],
-		final.Round)
+		final.Round,
+		final.Reset)
 }
 
 // Equal check equality of two Finalize instances.
 func (final *Finalize) Equal(other *Finalize) bool {
 	return final.ProposerID.Equal(other.ProposerID) &&
 		final.Round == other.Round &&
+		final.Reset == other.Reset &&
 		final.Signature.Type == other.Signature.Type &&
 		bytes.Compare(final.Signature.Signature, other.Signature.Signature) == 0
 }
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus/core/utils/crypto.go b/vendor/github.com/dexon-foundation/dexon-consensus/core/utils/crypto.go
index f5343ca38..7532d299e 100644
--- a/vendor/github.com/dexon-foundation/dexon-consensus/core/utils/crypto.go
+++ b/vendor/github.com/dexon-foundation/dexon-consensus/core/utils/crypto.go
@@ -148,11 +148,14 @@ func hashPosition(position types.Position) common.Hash {
 func hashDKGPrivateShare(prvShare *typesDKG.PrivateShare) common.Hash {
 	binaryRound := make([]byte, 8)
 	binary.LittleEndian.PutUint64(binaryRound, prvShare.Round)
+	binaryReset := make([]byte, 8)
+	binary.LittleEndian.PutUint64(binaryReset, prvShare.Reset)
 
 	return crypto.Keccak256Hash(
 		prvShare.ProposerID.Hash[:],
 		prvShare.ReceiverID.Hash[:],
 		binaryRound,
+		binaryReset,
 		prvShare.PrivateShare.Bytes(),
 	)
 }
@@ -175,12 +178,15 @@ func VerifyDKGPrivateShareSignature(
 func hashDKGMasterPublicKey(mpk *typesDKG.MasterPublicKey) common.Hash {
 	binaryRound := make([]byte, 8)
 	binary.LittleEndian.PutUint64(binaryRound, mpk.Round)
+	binaryReset := make([]byte, 8)
+	binary.LittleEndian.PutUint64(binaryReset, mpk.Reset)
 
 	return crypto.Keccak256Hash(
 		mpk.ProposerID.Hash[:],
 		mpk.DKGID.GetLittleEndian(),
 		mpk.PublicKeyShares.MasterKeyBytes(),
 		binaryRound,
+		binaryReset,
 	)
 }
 
@@ -201,12 +207,15 @@ func VerifyDKGMasterPublicKeySignature(
 func hashDKGComplaint(complaint *typesDKG.Complaint) common.Hash {
 	binaryRound := make([]byte, 8)
 	binary.LittleEndian.PutUint64(binaryRound, complaint.Round)
+	binaryReset := make([]byte, 8)
+	binary.LittleEndian.PutUint64(binaryReset, complaint.Reset)
 
 	hashPrvShare := hashDKGPrivateShare(&complaint.PrivateShare)
 
 	return crypto.Keccak256Hash(
 		complaint.ProposerID.Hash[:],
 		binaryRound,
+		binaryReset,
 		hashPrvShare[:],
 	)
 }
@@ -217,6 +226,9 @@ func VerifyDKGComplaintSignature(
 	if complaint.Round != complaint.PrivateShare.Round {
 		return false, nil
 	}
+	if complaint.Reset != complaint.PrivateShare.Reset {
+		return false, nil
+	}
 	hash := hashDKGComplaint(complaint)
 	pubKey, err := crypto.SigToPub(hash, complaint.Signature)
 	if err != nil {
@@ -261,10 +273,13 @@ func VerifyDKGPartialSignatureSignature(
 func hashDKGMPKReady(ready *typesDKG.MPKReady) common.Hash {
 	binaryRound := make([]byte, 8)
 	binary.LittleEndian.PutUint64(binaryRound, ready.Round)
+	binaryReset := make([]byte, 8)
+	binary.LittleEndian.PutUint64(binaryReset, ready.Reset)
 
 	return crypto.Keccak256Hash(
 		ready.ProposerID.Hash[:],
 		binaryRound,
+		binaryReset,
 	)
 }
 
@@ -285,10 +300,13 @@ func VerifyDKGMPKReadySignature(
 func hashDKGFinalize(final *typesDKG.Finalize) common.Hash {
 	binaryRound := make([]byte, 8)
 	binary.LittleEndian.PutUint64(binaryRound, final.Round)
+	binaryReset := make([]byte, 8)
+	binary.LittleEndian.PutUint64(binaryReset, final.Reset)
 
 	return crypto.Keccak256Hash(
 		final.ProposerID.Hash[:],
 		binaryRound,
+		binaryReset,
 	)
 }
 
diff --git a/vendor/vendor.json b/vendor/vendor.json
index aa7a3ff65..a9ccdbf29 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -141,16 +141,16 @@
 		{
 			"checksumSHA1": "8EuKVkP1v/w5fRuuvUaXX5k/F+I=",
 			"path": "github.com/dexon-foundation/dexon-consensus/common",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
-			"checksumSHA1": "bYtL3br8SNzJRQzD0leNywoSo2M=",
+			"checksumSHA1": "Mww2DjHBDmD5YUzUSIwJTa53BIg=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
@@ -165,64 +165,64 @@
 		{
 			"checksumSHA1": "tQSbYCu5P00lUhKsx3IbBZCuSLY=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/crypto",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
 			"checksumSHA1": "kC/Tu4is9+jABI/EdvEv7VxwvEo=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/crypto/dkg",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
 			"checksumSHA1": "BhLKK8RveoLaeXc9UyUKMwQqchU=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/crypto/ecdsa",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
 			"checksumSHA1": "dQOZYmiikmjWhwkUJc0QmCJnO9o=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/db",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
 			"checksumSHA1": "H0+GIDijBmoic/0HSTZBUwEij5A=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/syncer",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
 			"checksumSHA1": "id8imcgp3SqYhIx0k3Chd0VZrUQ=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/types",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
-			"checksumSHA1": "QXRBX9UmvX4wszA9qlyJtzYcTOw=",
+			"checksumSHA1": "yoVRmvJDCp/1jSfY7wMt2LBQ9e8=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/types/dkg",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},
 		{
-			"checksumSHA1": "D9I012bShlJM+rsYxG5sH5nvqXA=",
+			"checksumSHA1": "yoUeXa3YR9zZloqS9M08Ts8Ak1A=",
 			"path": "github.com/dexon-foundation/dexon-consensus/core/utils",
-			"revision": "c0e1c45539fe882c4cd096a41e36f764d5ad2092",
-			"revisionTime": "2019-03-16T10:51:30Z",
+			"revision": "4b40c1b8990d2a371a77018feea32d038163f2ec",
+			"revisionTime": "2019-03-17T01:56:23Z",
 			"version": "single-chain",
 			"versionExact": "single-chain"
 		},