diff --git a/go.mod b/go.mod
index de9fc5226..b6c004c6d 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	github.com/go-yaml/yaml v2.1.0+incompatible
 	github.com/gorilla/websocket v1.4.2
 	github.com/mr-tron/base58 v1.1.2
-	github.com/nspcc-dev/dbft v0.0.0-20200623100921-5a182c20965e
+	github.com/nspcc-dev/dbft v0.0.0-20200711144034-c526ccc6f570
 	github.com/nspcc-dev/rfc6979 v0.2.0
 	github.com/pierrec/lz4 v2.5.2+incompatible
 	github.com/pkg/errors v0.8.1
diff --git a/go.sum b/go.sum
index 4950195d0..57963dec3 100644
--- a/go.sum
+++ b/go.sum
@@ -137,8 +137,8 @@ github.com/nspcc-dev/dbft v0.0.0-20200117124306-478e5cfbf03a h1:ajvxgEe9qY4vvoSm
 github.com/nspcc-dev/dbft v0.0.0-20200117124306-478e5cfbf03a/go.mod h1:/YFK+XOxxg0Bfm6P92lY5eDSLYfp06XOdL8KAVgXjVk=
 github.com/nspcc-dev/dbft v0.0.0-20200219114139-199d286ed6c1 h1:yEx9WznS+rjE0jl0dLujCxuZSIb+UTjF+005TJu/nNI=
 github.com/nspcc-dev/dbft v0.0.0-20200219114139-199d286ed6c1/go.mod h1:O0qtn62prQSqizzoagHmuuKoz8QMkU3SzBoKdEvm3aQ=
-github.com/nspcc-dev/dbft v0.0.0-20200623100921-5a182c20965e h1:QOT9slflIkEKb5wY0ZUC0dCmCgoqGlhOAh9+xWMIxfg=
-github.com/nspcc-dev/dbft v0.0.0-20200623100921-5a182c20965e/go.mod h1:1FYQXSbb6/9HQIkoF8XO7W/S8N7AZRkBsgwbcXRvk0E=
+github.com/nspcc-dev/dbft v0.0.0-20200711144034-c526ccc6f570 h1:EHBwlOyd2m06C3dnxhpPokpYqlNg7u5ZX/uPBhjYuZ4=
+github.com/nspcc-dev/dbft v0.0.0-20200711144034-c526ccc6f570/go.mod h1:1FYQXSbb6/9HQIkoF8XO7W/S8N7AZRkBsgwbcXRvk0E=
 github.com/nspcc-dev/neo-go v0.73.1-pre.0.20200303142215-f5a1b928ce09/go.mod h1:pPYwPZ2ks+uMnlRLUyXOpLieaDQSEaf4NM3zHVbRjmg=
 github.com/nspcc-dev/neofs-crypto v0.2.0 h1:ftN+59WqxSWz/RCgXYOfhmltOOqU+udsNQSvN6wkFck=
 github.com/nspcc-dev/neofs-crypto v0.2.0/go.mod h1:F/96fUzPM3wR+UGsPi3faVNmFlA9KAEAUQR7dMxZmNA=
diff --git a/pkg/consensus/block.go b/pkg/consensus/block.go
index cc4a77f99..390846fc6 100644
--- a/pkg/consensus/block.go
+++ b/pkg/consensus/block.go
@@ -65,7 +65,7 @@ func (n *neoBlock) PrevHash() util.Uint256 { return n.Block.PrevHash }
 func (n *neoBlock) MerkleRoot() util.Uint256 { return n.Block.MerkleRoot }
 
 // Timestamp implements block.Block interface.
-func (n *neoBlock) Timestamp() uint64 { return n.Block.Timestamp * 1000000 }
+func (n *neoBlock) Timestamp() uint64 { return n.Block.Timestamp * nsInMs }
 
 // Index implements block.Block interface.
 func (n *neoBlock) Index() uint32 { return n.Block.Index }
diff --git a/pkg/consensus/change_view.go b/pkg/consensus/change_view.go
index 30ecf4eb0..fedc72c8e 100644
--- a/pkg/consensus/change_view.go
+++ b/pkg/consensus/change_view.go
@@ -8,19 +8,22 @@ import (
 // changeView represents dBFT ChangeView message.
 type changeView struct {
 	newViewNumber byte
-	timestamp     uint32
+	timestamp     uint64
+	reason        payload.ChangeViewReason
 }
 
 var _ payload.ChangeView = (*changeView)(nil)
 
 // EncodeBinary implements io.Serializable interface.
 func (c *changeView) EncodeBinary(w *io.BinWriter) {
-	w.WriteU32LE(c.timestamp)
+	w.WriteU64LE(c.timestamp)
+	w.WriteB(byte(c.reason))
 }
 
 // DecodeBinary implements io.Serializable interface.
 func (c *changeView) DecodeBinary(r *io.BinReader) {
-	c.timestamp = r.ReadU32LE()
+	c.timestamp = r.ReadU64LE()
+	c.reason = payload.ChangeViewReason(r.ReadB())
 }
 
 // NewViewNumber implements payload.ChangeView interface.
@@ -30,7 +33,13 @@ func (c changeView) NewViewNumber() byte { return c.newViewNumber }
 func (c *changeView) SetNewViewNumber(view byte) { c.newViewNumber = view }
 
 // Timestamp implements payload.ChangeView interface.
-func (c changeView) Timestamp() uint32 { return c.timestamp }
+func (c changeView) Timestamp() uint64 { return c.timestamp * nsInMs }
 
 // SetTimestamp implements payload.ChangeView interface.
-func (c *changeView) SetTimestamp(ts uint32) { c.timestamp = ts }
+func (c *changeView) SetTimestamp(ts uint64) { c.timestamp = ts / nsInMs }
+
+// Reason implements payload.ChangeView interface.
+func (c changeView) Reason() payload.ChangeViewReason { return c.reason }
+
+// SetReason implements payload.ChangeView interface.
+func (c *changeView) SetReason(reason payload.ChangeViewReason) { c.reason = reason }
diff --git a/pkg/consensus/change_view_test.go b/pkg/consensus/change_view_test.go
index 4d1142f39..eaad6b2db 100644
--- a/pkg/consensus/change_view_test.go
+++ b/pkg/consensus/change_view_test.go
@@ -9,8 +9,8 @@ import (
 func TestChangeView_Setters(t *testing.T) {
 	var c changeView
 
-	c.SetTimestamp(123)
-	require.EqualValues(t, 123, c.Timestamp())
+	c.SetTimestamp(123 * nsInMs)
+	require.EqualValues(t, 123*nsInMs, c.Timestamp())
 
 	c.SetNewViewNumber(2)
 	require.EqualValues(t, 2, c.NewViewNumber())
diff --git a/pkg/consensus/consensus.go b/pkg/consensus/consensus.go
index c0a74e666..921da8659 100644
--- a/pkg/consensus/consensus.go
+++ b/pkg/consensus/consensus.go
@@ -32,6 +32,9 @@ const cacheMaxCapacity = 100
 // defaultTimePerBlock is a period between blocks which is used in NEO.
 const defaultTimePerBlock = 15 * time.Second
 
+// Number of nanoseconds in millisecond.
+const nsInMs = 1000000
+
 // Service represents consensus instance.
 type Service interface {
 	// Start initializes dBFT and starts event loop for consensus service.
@@ -446,12 +449,16 @@ func (s *service) getVerifiedTx() []block.Transaction {
 	return res
 }
 
-func (s *service) getValidators(_ ...block.Transaction) []crypto.PublicKey {
+func (s *service) getValidators(txes ...block.Transaction) []crypto.PublicKey {
 	var (
 		pKeys []*keys.PublicKey
 		err   error
 	)
-	pKeys, err = s.Chain.GetValidators()
+	if txes == nil {
+		pKeys, err = s.Chain.GetNextBlockValidators()
+	} else {
+		pKeys, err = s.Chain.GetValidators()
+	}
 	if err != nil {
 		s.log.Error("error while trying to get validators", zap.Error(err))
 	}
@@ -464,15 +471,8 @@ func (s *service) getValidators(_ ...block.Transaction) []crypto.PublicKey {
 	return pubs
 }
 
-func (s *service) getConsensusAddress(validators ...crypto.PublicKey) (h util.Uint160) {
-	pubs := convertKeys(validators)
-
-	script, err := smartcontract.CreateMultiSigRedeemScript(s.dbft.M(), pubs)
-	if err != nil {
-		return
-	}
-
-	return crypto.Hash160(script)
+func (s *service) getConsensusAddress(validators ...crypto.PublicKey) util.Uint160 {
+	return util.Uint160{}
 }
 
 func convertKeys(validators []crypto.PublicKey) (pubs []*keys.PublicKey) {
@@ -491,9 +491,18 @@ func (s *service) newBlockFromContext(ctx *dbft.Context) block.Block {
 	}
 
 	block.Block.Network = s.network
-	block.Block.Timestamp = ctx.Timestamp / 1000000
+	block.Block.Timestamp = ctx.Timestamp / nsInMs
 	block.Block.Index = ctx.BlockIndex
-	block.Block.NextConsensus = ctx.NextConsensus
+
+	validators, err := s.Chain.GetValidators()
+	if err != nil {
+		return nil
+	}
+	script, err := smartcontract.CreateMultiSigRedeemScript(len(validators)-(len(validators)-1)/3, validators)
+	if err != nil {
+		return nil
+	}
+	block.Block.NextConsensus = crypto.Hash160(script)
 	block.Block.PrevHash = ctx.PrevHash
 	block.Block.Version = ctx.Version
 	block.Block.ConsensusData.Nonce = ctx.Nonce
diff --git a/pkg/consensus/consensus_test.go b/pkg/consensus/consensus_test.go
index 902a31546..569c1acac 100644
--- a/pkg/consensus/consensus_test.go
+++ b/pkg/consensus/consensus_test.go
@@ -63,7 +63,7 @@ func TestService_GetVerified(t *testing.T) {
 			p.SetPayload(&prepareRequest{transactionHashes: hashes})
 		} else {
 			p.SetType(payload.ChangeViewType)
-			p.SetPayload(&changeView{newViewNumber: 1, timestamp: uint32(time.Now().Unix())})
+			p.SetPayload(&changeView{newViewNumber: 1, timestamp: uint64(time.Now().UnixNano() / nsInMs)})
 		}
 		p.SetHeight(1)
 		p.SetValidatorIndex(uint16(i))
diff --git a/pkg/consensus/payload_test.go b/pkg/consensus/payload_test.go
index 45d44c6cc..1cbe97a3b 100644
--- a/pkg/consensus/payload_test.go
+++ b/pkg/consensus/payload_test.go
@@ -224,7 +224,7 @@ func randomMessage(t *testing.T, mt messageType) io.Serializable {
 	switch mt {
 	case changeViewType:
 		return &changeView{
-			timestamp: rand.Uint32(),
+			timestamp: rand.Uint64(),
 		}
 	case prepareRequestType:
 		return randomPrepareRequest(t)
@@ -235,7 +235,7 @@ func randomMessage(t *testing.T, mt messageType) io.Serializable {
 		random.Fill(c.signature[:])
 		return &c
 	case recoveryRequestType:
-		return &recoveryRequest{timestamp: rand.Uint32()}
+		return &recoveryRequest{timestamp: rand.Uint64()}
 	case recoveryMessageType:
 		return randomRecoveryMessage(t)
 	default:
@@ -256,7 +256,6 @@ func randomPrepareRequest(t *testing.T) *prepareRequest {
 	for i := 0; i < txCount; i++ {
 		req.transactionHashes[i] = random.Uint256()
 	}
-	req.nextConsensus = random.Uint160()
 
 	return req
 }
@@ -289,7 +288,7 @@ func randomRecoveryMessage(t *testing.T) *recoveryMessage {
 		},
 		changeViewPayloads: []*changeViewCompact{
 			{
-				Timestamp:          rand.Uint32(),
+				Timestamp:          rand.Uint64(),
 				ValidatorIndex:     3,
 				OriginalViewNumber: 3,
 				InvocationScript:   random.Bytes(4),
diff --git a/pkg/consensus/prepare_request.go b/pkg/consensus/prepare_request.go
index fb1d314f9..cded41ed2 100644
--- a/pkg/consensus/prepare_request.go
+++ b/pkg/consensus/prepare_request.go
@@ -11,7 +11,6 @@ type prepareRequest struct {
 	timestamp         uint64
 	nonce             uint64
 	transactionHashes []util.Uint256
-	nextConsensus     util.Uint160
 }
 
 var _ payload.PrepareRequest = (*prepareRequest)(nil)
@@ -20,7 +19,6 @@ var _ payload.PrepareRequest = (*prepareRequest)(nil)
 func (p *prepareRequest) EncodeBinary(w *io.BinWriter) {
 	w.WriteU64LE(p.timestamp)
 	w.WriteU64LE(p.nonce)
-	w.WriteBytes(p.nextConsensus[:])
 	w.WriteArray(p.transactionHashes)
 }
 
@@ -28,15 +26,14 @@ func (p *prepareRequest) EncodeBinary(w *io.BinWriter) {
 func (p *prepareRequest) DecodeBinary(r *io.BinReader) {
 	p.timestamp = r.ReadU64LE()
 	p.nonce = r.ReadU64LE()
-	r.ReadBytes(p.nextConsensus[:])
 	r.ReadArray(&p.transactionHashes)
 }
 
 // Timestamp implements payload.PrepareRequest interface.
-func (p *prepareRequest) Timestamp() uint64 { return p.timestamp * 1000000 }
+func (p *prepareRequest) Timestamp() uint64 { return p.timestamp * nsInMs }
 
 // SetTimestamp implements payload.PrepareRequest interface.
-func (p *prepareRequest) SetTimestamp(ts uint64) { p.timestamp = ts / 1000000 }
+func (p *prepareRequest) SetTimestamp(ts uint64) { p.timestamp = ts / nsInMs }
 
 // Nonce implements payload.PrepareRequest interface.
 func (p *prepareRequest) Nonce() uint64 { return p.nonce }
@@ -51,7 +48,7 @@ func (p *prepareRequest) TransactionHashes() []util.Uint256 { return p.transacti
 func (p *prepareRequest) SetTransactionHashes(hs []util.Uint256) { p.transactionHashes = hs }
 
 // NextConsensus implements payload.PrepareRequest interface.
-func (p *prepareRequest) NextConsensus() util.Uint160 { return p.nextConsensus }
+func (p *prepareRequest) NextConsensus() util.Uint160 { return util.Uint160{} }
 
 // SetNextConsensus implements payload.PrepareRequest interface.
-func (p *prepareRequest) SetNextConsensus(nc util.Uint160) { p.nextConsensus = nc }
+func (p *prepareRequest) SetNextConsensus(_ util.Uint160) {}
diff --git a/pkg/consensus/prepare_request_test.go b/pkg/consensus/prepare_request_test.go
index 4b91e6cfb..188e32d97 100644
--- a/pkg/consensus/prepare_request_test.go
+++ b/pkg/consensus/prepare_request_test.go
@@ -20,7 +20,7 @@ func TestPrepareRequest_Setters(t *testing.T) {
 	require.EqualValues(t, 1000000, p.Timestamp())
 
 	p.SetNextConsensus(util.Uint160{5, 6, 7})
-	require.Equal(t, util.Uint160{5, 6, 7}, p.NextConsensus())
+	require.Equal(t, util.Uint160{}, p.NextConsensus())
 
 	p.SetNonce(8765)
 	require.EqualValues(t, 8765, p.Nonce())
diff --git a/pkg/consensus/recovery_message.go b/pkg/consensus/recovery_message.go
index 8e894b884..817e241e8 100644
--- a/pkg/consensus/recovery_message.go
+++ b/pkg/consensus/recovery_message.go
@@ -21,7 +21,7 @@ type (
 	changeViewCompact struct {
 		ValidatorIndex     uint16
 		OriginalViewNumber byte
-		Timestamp          uint32
+		Timestamp          uint64
 		InvocationScript   []byte
 	}
 
@@ -95,7 +95,7 @@ func (m *recoveryMessage) EncodeBinary(w *io.BinWriter) {
 func (p *changeViewCompact) DecodeBinary(r *io.BinReader) {
 	p.ValidatorIndex = r.ReadU16LE()
 	p.OriginalViewNumber = r.ReadB()
-	p.Timestamp = r.ReadU32LE()
+	p.Timestamp = r.ReadU64LE()
 	p.InvocationScript = r.ReadVarBytes(1024)
 }
 
@@ -103,7 +103,7 @@ func (p *changeViewCompact) DecodeBinary(r *io.BinReader) {
 func (p *changeViewCompact) EncodeBinary(w *io.BinWriter) {
 	w.WriteU16LE(p.ValidatorIndex)
 	w.WriteB(p.OriginalViewNumber)
-	w.WriteU32LE(p.Timestamp)
+	w.WriteU64LE(p.Timestamp)
 	w.WriteVarBytes(p.InvocationScript)
 }
 
@@ -164,7 +164,7 @@ func (m *recoveryMessage) AddPayload(p payload.ConsensusPayload) {
 		m.changeViewPayloads = append(m.changeViewPayloads, &changeViewCompact{
 			ValidatorIndex:     p.ValidatorIndex(),
 			OriginalViewNumber: p.ViewNumber(),
-			Timestamp:          p.GetChangeView().Timestamp(),
+			Timestamp:          p.GetChangeView().Timestamp() / nsInMs,
 			InvocationScript:   p.(*Payload).Witness.InvocationScript,
 		})
 	case payload.CommitType:
diff --git a/pkg/consensus/recovery_message_test.go b/pkg/consensus/recovery_message_test.go
index 203edf45c..54544edb0 100644
--- a/pkg/consensus/recovery_message_test.go
+++ b/pkg/consensus/recovery_message_test.go
@@ -31,7 +31,6 @@ func TestRecoveryMessage_Setters(t *testing.T) {
 		timestamp:         87,
 		nonce:             321,
 		transactionHashes: []util.Uint256{{1}},
-		nextConsensus:     util.Uint160{1, 2},
 	}
 	p1 := new(Payload)
 	p1.message = &message{}
diff --git a/pkg/consensus/recovery_request.go b/pkg/consensus/recovery_request.go
index d40c6f9e4..52e0fb269 100644
--- a/pkg/consensus/recovery_request.go
+++ b/pkg/consensus/recovery_request.go
@@ -7,23 +7,23 @@ import (
 
 // recoveryRequest represents dBFT RecoveryRequest message.
 type recoveryRequest struct {
-	timestamp uint32
+	timestamp uint64
 }
 
 var _ payload.RecoveryRequest = (*recoveryRequest)(nil)
 
 // DecodeBinary implements io.Serializable interface.
 func (m *recoveryRequest) DecodeBinary(r *io.BinReader) {
-	m.timestamp = r.ReadU32LE()
+	m.timestamp = r.ReadU64LE()
 }
 
 // EncodeBinary implements io.Serializable interface.
 func (m *recoveryRequest) EncodeBinary(w *io.BinWriter) {
-	w.WriteU32LE(m.timestamp)
+	w.WriteU64LE(m.timestamp)
 }
 
 // Timestamp implements payload.RecoveryRequest interface.
-func (m *recoveryRequest) Timestamp() uint32 { return m.timestamp }
+func (m *recoveryRequest) Timestamp() uint64 { return m.timestamp * nsInMs }
 
 // SetTimestamp implements payload.RecoveryRequest interface.
-func (m *recoveryRequest) SetTimestamp(ts uint32) { m.timestamp = ts }
+func (m *recoveryRequest) SetTimestamp(ts uint64) { m.timestamp = ts / nsInMs }
diff --git a/pkg/consensus/recovery_request_test.go b/pkg/consensus/recovery_request_test.go
index e061711ff..adfc57c51 100644
--- a/pkg/consensus/recovery_request_test.go
+++ b/pkg/consensus/recovery_request_test.go
@@ -9,6 +9,6 @@ import (
 func TestRecoveryRequest_Setters(t *testing.T) {
 	var r recoveryRequest
 
-	r.SetTimestamp(123)
-	require.EqualValues(t, 123, r.Timestamp())
+	r.SetTimestamp(123 * nsInMs)
+	require.EqualValues(t, 123*nsInMs, r.Timestamp())
 }
diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index bbfa38219..a8646e571 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1240,8 +1240,13 @@ func (bc *Blockchain) GetStandByValidators() keys.PublicKeys {
 	return bc.sbValidators.Copy()
 }
 
-// GetValidators returns next block validators.
+// GetValidators returns current validators.
 func (bc *Blockchain) GetValidators() ([]*keys.PublicKey, error) {
+	return bc.contracts.NEO.GetValidatorsInternal(bc, bc.dao)
+}
+
+// GetNextBlockValidators returns next block validators.
+func (bc *Blockchain) GetNextBlockValidators() ([]*keys.PublicKey, error) {
 	return bc.contracts.NEO.GetNextBlockValidatorsInternal(bc, bc.dao)
 }
 
diff --git a/pkg/core/blockchainer/blockchainer.go b/pkg/core/blockchainer/blockchainer.go
index ce723614b..9dcac9e33 100644
--- a/pkg/core/blockchainer/blockchainer.go
+++ b/pkg/core/blockchainer/blockchainer.go
@@ -36,6 +36,7 @@ type Blockchainer interface {
 	HasTransaction(util.Uint256) bool
 	GetAccountState(util.Uint160) *state.Account
 	GetAppExecResult(util.Uint256) (*state.AppExecResult, error)
+	GetNextBlockValidators() ([]*keys.PublicKey, error)
 	GetNEP5TransferLog(util.Uint160) *state.NEP5TransferLog
 	GetNEP5Balances(util.Uint160) *state.NEP5Balances
 	GetValidators() ([]*keys.PublicKey, error)
diff --git a/pkg/core/native/native_neo.go b/pkg/core/native/native_neo.go
index 6d169eaa4..747025315 100644
--- a/pkg/core/native/native_neo.go
+++ b/pkg/core/native/native_neo.go
@@ -142,7 +142,7 @@ func (n *NEO) Initialize(ic *interop.Context) error {
 
 // OnPersist implements Contract interface.
 func (n *NEO) OnPersist(ic *interop.Context) error {
-	pubs, err := n.getValidatorsInternal(ic.Chain, ic.DAO)
+	pubs, err := n.GetValidatorsInternal(ic.Chain, ic.DAO)
 	if err != nil {
 		return err
 	}
@@ -385,16 +385,16 @@ func (n *NEO) getRegisteredValidatorsCall(ic *interop.Context, _ []stackitem.Ite
 	return stackitem.NewArray(arr)
 }
 
-// getValidatorsInternal returns a list of current validators.
-func (n *NEO) getValidatorsInternal(bc blockchainer.Blockchainer, d dao.DAO) (keys.PublicKeys, error) {
+// GetValidatorsInternal returns a list of current validators.
+func (n *NEO) GetValidatorsInternal(bc blockchainer.Blockchainer, d dao.DAO) (keys.PublicKeys, error) {
 	if vals := n.validators.Load().(keys.PublicKeys); vals != nil {
-		return vals, nil
+		return vals.Copy(), nil
 	}
 	standByValidators := bc.GetStandByValidators()
 	si := d.GetStorageItem(n.ContractID, validatorsCountKey)
 	if si == nil {
 		n.validators.Store(standByValidators)
-		return standByValidators, nil
+		return standByValidators.Copy(), nil
 	}
 	validatorsCount, err := ValidatorsCountFromBytes(si.Value)
 	if err != nil {
@@ -442,7 +442,7 @@ func (n *NEO) getValidatorsInternal(bc blockchainer.Blockchainer, d dao.DAO) (ke
 }
 
 func (n *NEO) getValidators(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
-	result, err := n.getValidatorsInternal(ic.Chain, ic.DAO)
+	result, err := n.GetValidatorsInternal(ic.Chain, ic.DAO)
 	if err != nil {
 		panic(err)
 	}
@@ -470,7 +470,7 @@ func (n *NEO) GetNextBlockValidatorsInternal(bc blockchainer.Blockchainer, d dao
 func (n *NEO) getNextBlockValidatorsInternal(bc blockchainer.Blockchainer, d dao.DAO) (keys.PublicKeys, error) {
 	si := d.GetStorageItem(n.ContractID, nextValidatorsKey)
 	if si == nil {
-		return n.getValidatorsInternal(bc, d)
+		return n.GetValidatorsInternal(bc, d)
 	}
 	pubs := keys.PublicKeys{}
 	err := pubs.DecodeBytes(si.Value)
diff --git a/pkg/network/helper_test.go b/pkg/network/helper_test.go
index cc7dbcb7c..6004c44a4 100644
--- a/pkg/network/helper_test.go
+++ b/pkg/network/helper_test.go
@@ -77,6 +77,9 @@ func (chain testChain) GetHeader(hash util.Uint256) (*block.Header, error) {
 func (chain testChain) GetAccountState(util.Uint160) *state.Account {
 	panic("TODO")
 }
+func (chain testChain) GetNextBlockValidators() ([]*keys.PublicKey, error) {
+	panic("TODO")
+}
 func (chain testChain) GetNEP5TransferLog(util.Uint160) *state.NEP5TransferLog {
 	panic("TODO")
 }