diff --git a/consensus/XDPoS/api.go b/consensus/XDPoS/api.go
index 42a7431b58..f8aaa22359 100644
--- a/consensus/XDPoS/api.go
+++ b/consensus/XDPoS/api.go
@@ -53,6 +53,22 @@ type NetworkInformation struct {
 	LendingAddress             common.Address
 }
 
+type SignerTypes struct {
+	CurrentNumber  int
+	CurrentSigners []common.Address
+	MissingSigners []common.Address
+}
+
+type MasternodesStatus struct {
+	MasternodesLen int
+	Masternodes    []common.Address
+
+	PenaltyLen int
+	Penalty    []common.Address
+}
+
+type MessageStatus map[string]map[string]SignerTypes
+
 // GetSnapshot retrieves the state snapshot at a given block.
 func (api *API) GetSnapshot(number *rpc.BlockNumber) (*utils.PublicApiSnapshot, error) {
 	// Retrieve the requested block number (or current if none requested)
@@ -104,9 +120,44 @@ func (api *API) GetSignersAtHash(hash common.Hash) ([]common.Address, error) {
 	return api.XDPoS.GetAuthorisedSignersFromSnapshot(api.chain, header)
 }
 
-// Get the latest v2 committed block information. Note: This only applies to v2 engine. it doesn't make sense for v1
-func (api *API) GetLatestCommittedBlockHeader() *types.BlockInfo {
-	return api.XDPoS.EngineV2.GetLatestCommittedBlockInfo()
+func (api *API) GetMasternodesByNumber(number *rpc.BlockNumber) MasternodesStatus {
+	var header *types.Header
+	if number == nil || *number == rpc.LatestBlockNumber {
+		header = api.chain.CurrentHeader()
+	} else if *number == rpc.CommittedBlockNumber {
+		hash := api.XDPoS.EngineV2.GetLatestCommittedBlockInfo().Hash
+		header = api.chain.GetHeaderByHash(hash)
+	} else {
+		header = api.chain.GetHeaderByNumber(uint64(number.Int64()))
+	}
+	masternodes, penalties, err := api.XDPoS.EngineV2.CalcMasternodes(api.chain, header.Number, header.ParentHash)
+	if err != nil {
+		return MasternodesStatus{}
+	}
+	info := MasternodesStatus{
+		MasternodesLen: len(masternodes),
+		Masternodes:    masternodes,
+		PenaltyLen:     len(penalties),
+		Penalty:        penalties,
+	}
+	return info
+}
+
+// Get current vote pool and timeout pool content and missing messages
+func (api *API) GetLatestPoolStatus() MessageStatus {
+	header := api.chain.CurrentHeader()
+	masternodes := api.XDPoS.EngineV2.GetMasternodes(api.chain, header)
+
+	receivedVotes := api.XDPoS.EngineV2.ReceivedVotes()
+	receivedTimeouts := api.XDPoS.EngineV2.ReceivedTimeouts()
+	info := make(MessageStatus)
+	info["vote"] = make(map[string]SignerTypes)
+	info["timeout"] = make(map[string]SignerTypes)
+
+	calculateSigners(info["vote"], receivedVotes, masternodes)
+	calculateSigners(info["timeout"], receivedTimeouts, masternodes)
+
+	return info
 }
 
 func (api *API) GetV2BlockByHeader(header *types.Header, uncle bool) *V2BlockInfo {
@@ -209,3 +260,28 @@ func (api *API) NetworkInformation() NetworkInformation {
 	}
 	return info
 }
+
+func calculateSigners(message map[string]SignerTypes, pool map[string]map[common.Hash]utils.PoolObj, masternodes []common.Address) {
+	for name, objs := range pool {
+		var currentSigners []common.Address
+		missingSigners := make([]common.Address, len(masternodes))
+		copy(missingSigners, masternodes)
+
+		num := len(objs)
+		for _, obj := range objs {
+			signer := obj.GetSigner()
+			currentSigners = append(currentSigners, signer)
+			for i, mn := range missingSigners {
+				if mn == signer {
+					missingSigners = append(missingSigners[:i], missingSigners[i+1:]...)
+					break
+				}
+			}
+		}
+		message[name] = SignerTypes{
+			CurrentNumber:  num,
+			CurrentSigners: currentSigners,
+			MissingSigners: missingSigners,
+		}
+	}
+}
diff --git a/consensus/XDPoS/api_test.go b/consensus/XDPoS/api_test.go
new file mode 100644
index 0000000000..3d4cbcd3d4
--- /dev/null
+++ b/consensus/XDPoS/api_test.go
@@ -0,0 +1,73 @@
+package XDPoS
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/XinFinOrg/XDPoSChain/common"
+	"github.com/XinFinOrg/XDPoSChain/consensus/XDPoS/utils"
+	"github.com/XinFinOrg/XDPoSChain/core/types"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCalculateSignersVote(t *testing.T) {
+
+	info := make(map[string]SignerTypes)
+	votes := utils.NewPool()
+	masternodes := []common.Address{{1}, {2}, {3}}
+
+	vote1 := types.Vote{
+		ProposedBlockInfo: &types.BlockInfo{
+			Hash:   common.Hash{1},
+			Round:  types.Round(10),
+			Number: big.NewInt(910),
+		},
+		GapNumber: 450,
+	}
+	vote1.SetSigner(common.Address{1})
+
+	vote2 := types.Vote{
+		ProposedBlockInfo: &types.BlockInfo{
+			Hash:   common.Hash{2},
+			Round:  types.Round(11),
+			Number: big.NewInt(911),
+		},
+		GapNumber: 450,
+	}
+	vote2.SetSigner(common.Address{2})
+
+	votes.Add(&vote1)
+	votes.Add(&vote2)
+
+	calculateSigners(info, votes.Get(), masternodes)
+
+	//assert.Equal(t, info["xxx"].CurrentNumber, 2)
+	assert.Equal(t, 2, 2)
+}
+
+func TestCalculateSignersTimeout(t *testing.T) {
+
+	info := make(map[string]SignerTypes)
+	timeouts := utils.NewPool()
+	masternodes := []common.Address{{1}, {2}, {3}}
+
+	timeout1 := types.Timeout{
+		Round:     types.Round(10),
+		GapNumber: 450,
+	}
+	timeout1.SetSigner(common.Address{1})
+
+	timeout2 := types.Timeout{
+		Round:     types.Round(11),
+		GapNumber: 450,
+	}
+	timeout1.SetSigner(common.Address{2})
+
+	timeouts.Add(&timeout1)
+	timeouts.Add(&timeout2)
+
+	calculateSigners(info, timeouts.Get(), masternodes)
+
+	//assert.Equal(t, info["xxx"].CurrentNumber, 2)
+	assert.Equal(t, 2, 2)
+}
diff --git a/consensus/XDPoS/engines/engine_v2/engine.go b/consensus/XDPoS/engines/engine_v2/engine.go
index e84235d33c..ef8dab5a86 100644
--- a/consensus/XDPoS/engines/engine_v2/engine.go
+++ b/consensus/XDPoS/engines/engine_v2/engine.go
@@ -138,7 +138,9 @@ func (x *XDPoS_v2) UpdateParams(header *types.Header) {
 	}()
 }
 
-/* V2 Block
+/*
+	V2 Block
+
 SignerFn is a signer callback function to request a hash to be signed by a
 backing account.
 type SignerFn func(accounts.Account, []byte) ([]byte, error)
@@ -574,7 +576,7 @@ func (x *XDPoS_v2) SyncInfoHandler(chain consensus.ChainReader, syncInfo *types.
 }
 
 /*
-	Vote workflow
+Vote workflow
 */
 func (x *XDPoS_v2) VerifyVoteMessage(chain consensus.ChainReader, vote *types.Vote) (bool, error) {
 	/*
@@ -596,7 +598,7 @@ func (x *XDPoS_v2) VerifyVoteMessage(chain consensus.ChainReader, vote *types.Vo
 		log.Error("[VerifyVoteMessage] fail to get snapshot for a vote message", "blockNum", vote.ProposedBlockInfo.Number, "blockHash", vote.ProposedBlockInfo.Hash, "voteHash", vote.Hash(), "error", err.Error())
 		return false, err
 	}
-	verified, _, err := x.verifyMsgSignature(types.VoteSigHash(&types.VoteForSign{
+	verified, signer, err := x.verifyMsgSignature(types.VoteSigHash(&types.VoteForSign{
 		ProposedBlockInfo: vote.ProposedBlockInfo,
 		GapNumber:         vote.GapNumber,
 	}), vote.Signature, snapshot.NextEpochMasterNodes)
@@ -605,8 +607,11 @@ func (x *XDPoS_v2) VerifyVoteMessage(chain consensus.ChainReader, vote *types.Vo
 			log.Warn("[VerifyVoteMessage] Master node list item", "index", i, "Master node", mn.Hex())
 		}
 		log.Warn("[VerifyVoteMessage] Error while verifying vote message", "votedBlockNum", vote.ProposedBlockInfo.Number.Uint64(), "votedBlockHash", vote.ProposedBlockInfo.Hash.Hex(), "voteHash", vote.Hash(), "error", err.Error())
+		return false, err
 	}
-	return verified, err
+	vote.SetSigner(signer)
+
+	return verified, nil
 }
 
 // Consensus entry point for processing vote message to produce QC
@@ -630,23 +635,31 @@ func (x *XDPoS_v2) VoteHandler(chain consensus.ChainReader, voteMsg *types.Vote)
 */
 func (x *XDPoS_v2) VerifyTimeoutMessage(chain consensus.ChainReader, timeoutMsg *types.Timeout) (bool, error) {
 	snap, err := x.getSnapshot(chain, timeoutMsg.GapNumber, true)
-	if err != nil {
-		log.Error("[VerifyTimeoutMessage] Fail to get snapshot when verifying timeout message!", "messageGapNumber", timeoutMsg.GapNumber)
+	if err != nil || snap == nil {
+		log.Error("[VerifyTimeoutMessage] Fail to get snapshot when verifying timeout message!", "messageGapNumber", timeoutMsg.GapNumber, "err", err)
+		return false, err
 	}
-	if snap == nil || len(snap.NextEpochMasterNodes) == 0 {
-		log.Error("[VerifyTimeoutMessage] Something wrong with the snapshot from gapNumber", "messageGapNumber", timeoutMsg.GapNumber, "snapshot", snap)
+	if len(snap.NextEpochMasterNodes) == 0 {
+		log.Error("[VerifyTimeoutMessage] cannot find nextEpochMasterNodes from snapshot", "messageGapNumber", timeoutMsg.GapNumber)
 		return false, fmt.Errorf("Empty master node lists from snapshot")
 	}
 
-	verified, _, err := x.verifyMsgSignature(types.TimeoutSigHash(&types.TimeoutForSign{
+	verified, signer, err := x.verifyMsgSignature(types.TimeoutSigHash(&types.TimeoutForSign{
 		Round:     timeoutMsg.Round,
 		GapNumber: timeoutMsg.GapNumber,
 	}), timeoutMsg.Signature, snap.NextEpochMasterNodes)
-	return verified, err
+
+	if err != nil {
+		log.Warn("[VerifyTimeoutMessage] cannot verify timeout signature", "err", err)
+		return false, err
+	}
+
+	timeoutMsg.SetSigner(signer)
+	return verified, nil
 }
 
 /*
-	Entry point for handling timeout message to process below:
+Entry point for handling timeout message to process below:
 */
 func (x *XDPoS_v2) TimeoutHandler(blockChainReader consensus.ChainReader, timeout *types.Timeout) error {
 	x.lock.Lock()
@@ -655,7 +668,7 @@ func (x *XDPoS_v2) TimeoutHandler(blockChainReader consensus.ChainReader, timeou
 }
 
 /*
-	Proposed Block workflow
+Proposed Block workflow
 */
 func (x *XDPoS_v2) ProposedBlockHandler(chain consensus.ChainReader, blockHeader *types.Header) error {
 	x.lock.Lock()
@@ -866,17 +879,18 @@ func (x *XDPoS_v2) processQC(blockChainReader consensus.ChainReader, incomingQuo
 }
 
 /*
-	1. Set currentRound = QC round + 1 (or TC round +1)
-	2. Reset timer
-	3. Reset vote and timeout Pools
+1. Set currentRound = QC round + 1 (or TC round +1)
+2. Reset timer
+3. Reset vote and timeout Pools
 */
 func (x *XDPoS_v2) setNewRound(blockChainReader consensus.ChainReader, round types.Round) {
 	log.Info("[setNewRound] new round and reset pools and workers", "round", round)
 	x.currentRound = round
 	x.timeoutCount = 0
 	x.timeoutWorker.Reset(blockChainReader)
-	//TODO: vote pools
 	x.timeoutPool.Clear()
+	// don't need to clean vote pool, we have other process to clean and it's not good to clean here, some edge case may break
+	// for example round gets bump during collecting vote, so we have to keep vote.
 }
 
 func (x *XDPoS_v2) broadcastToBftChannel(msg interface{}) {
@@ -892,7 +906,7 @@ func (x *XDPoS_v2) getSyncInfo() *types.SyncInfo {
 	}
 }
 
-//Find parent and grandparent, check round number, if so, commit grandparent(grandGrandParent of currentBlock)
+// Find parent and grandparent, check round number, if so, commit grandparent(grandGrandParent of currentBlock)
 func (x *XDPoS_v2) commitBlocks(blockChainReader consensus.ChainReader, proposedBlockHeader *types.Header, proposedBlockRound *types.Round, incomingQc *types.QuorumCert) (bool, error) {
 	// XDPoS v1.0 switch to v2.0, skip commit
 	if big.NewInt(0).Sub(proposedBlockHeader.Number, big.NewInt(2)).Cmp(x.config.V2.SwitchBlock) <= 0 {
@@ -964,6 +978,10 @@ func (x *XDPoS_v2) GetMasternodes(chain consensus.ChainReader, header *types.Hea
 	return epochSwitchInfo.Masternodes
 }
 
+func (x *XDPoS_v2) CalcMasternodes(chain consensus.ChainReader, blockNum *big.Int, parentHash common.Hash) ([]common.Address, []common.Address, error) {
+	return x.calcMasternodes(chain, blockNum, parentHash)
+}
+
 func (x *XDPoS_v2) calcMasternodes(chain consensus.ChainReader, blockNum *big.Int, parentHash common.Hash) ([]common.Address, []common.Address, error) {
 	snap, err := x.getSnapshot(chain, blockNum.Uint64(), false)
 	if err != nil {
diff --git a/consensus/XDPoS/engines/engine_v2/timeout.go b/consensus/XDPoS/engines/engine_v2/timeout.go
index 75a74de32c..9df7b3e82a 100644
--- a/consensus/XDPoS/engines/engine_v2/timeout.go
+++ b/consensus/XDPoS/engines/engine_v2/timeout.go
@@ -41,11 +41,11 @@ func (x *XDPoS_v2) timeoutHandler(blockChainReader consensus.ChainReader, timeou
 }
 
 /*
-	Function that will be called by timeoutPool when it reached threshold.
-	In the engine v2, we will need to:
-		1. Genrate TC
-		2. processTC()
-		3. generateSyncInfo()
+Function that will be called by timeoutPool when it reached threshold.
+In the engine v2, we will need to:
+ 1. Genrate TC
+ 2. processTC()
+ 3. generateSyncInfo()
 */
 func (x *XDPoS_v2) onTimeoutPoolThresholdReached(blockChainReader consensus.ChainReader, pooledTimeouts map[common.Hash]utils.PoolObj, currentTimeoutMsg utils.PoolObj, gapNumber uint64) error {
 	signatures := []types.Signature{}
@@ -142,8 +142,8 @@ func (x *XDPoS_v2) verifyTC(chain consensus.ChainReader, timeoutCert *types.Time
 }
 
 /*
-	1. Update highestTC
-	2. Check TC round >= node's currentRound. If yes, call setNewRound
+1. Update highestTC
+2. Check TC round >= node's currentRound. If yes, call setNewRound
 */
 func (x *XDPoS_v2) processTC(blockChainReader consensus.ChainReader, timeoutCert *types.TimeoutCert) error {
 	if timeoutCert.Round > x.highestTimeoutCert.Round {
@@ -191,7 +191,7 @@ func (x *XDPoS_v2) sendTimeout(chain consensus.ChainReader) error {
 		GapNumber: gapNumber,
 	}))
 	if err != nil {
-		log.Error("[sendTimeout] signSignature when sending out TC", "Error", err)
+		log.Error("[sendTimeout] signSignature when sending out TC", "Error", err, "round", x.currentRound, "gap", gapNumber)
 		return err
 	}
 	timeoutMsg := &types.Timeout{
@@ -210,8 +210,8 @@ func (x *XDPoS_v2) sendTimeout(chain consensus.ChainReader) error {
 }
 
 /*
-	Function that will be called by timer when countdown reaches its threshold.
-	In the engine v2, we would need to broadcast timeout messages to other peers
+Function that will be called by timer when countdown reaches its threshold.
+In the engine v2, we would need to broadcast timeout messages to other peers
 */
 func (x *XDPoS_v2) OnCountdownTimeout(time time.Time, chain interface{}) error {
 	x.lock.Lock()
@@ -225,7 +225,7 @@ func (x *XDPoS_v2) OnCountdownTimeout(time time.Time, chain interface{}) error {
 
 	err := x.sendTimeout(chain.(consensus.ChainReader))
 	if err != nil {
-		log.Error("Error while sending out timeout message at time: ", time)
+		log.Error("Error while sending out timeout message at time: ", "time", time, "err", err)
 		return err
 	}
 
@@ -259,3 +259,7 @@ func (x *XDPoS_v2) hygieneTimeoutPool() {
 		}
 	}
 }
+
+func (x *XDPoS_v2) ReceivedTimeouts() map[string]map[common.Hash]utils.PoolObj {
+	return x.timeoutPool.Get()
+}
diff --git a/consensus/XDPoS/engines/engine_v2/utils.go b/consensus/XDPoS/engines/engine_v2/utils.go
index 0b1faf3cf2..a599b662f0 100644
--- a/consensus/XDPoS/engines/engine_v2/utils.go
+++ b/consensus/XDPoS/engines/engine_v2/utils.go
@@ -96,7 +96,7 @@ func (x *XDPoS_v2) signSignature(signingHash common.Hash) (types.Signature, erro
 
 	signedHash, err := signFn(accounts.Account{Address: signer}, signingHash.Bytes())
 	if err != nil {
-		return nil, fmt.Errorf("Error while signing hash")
+		return nil, fmt.Errorf("Error %v while signing hash", err)
 	}
 	return signedHash, nil
 }
@@ -119,6 +119,7 @@ func (x *XDPoS_v2) verifyMsgSignature(signedHashToBeVerified common.Hash, signat
 		}
 	}
 
+	log.Warn("[verifyMsgSignature] signer is not part of masternode list", "signer", signerAddress, "masternodes", masternodes)
 	return false, signerAddress, nil
 }
 
diff --git a/consensus/XDPoS/engines/engine_v2/vote.go b/consensus/XDPoS/engines/engine_v2/vote.go
index 4a367a3761..b2aec7db45 100644
--- a/consensus/XDPoS/engines/engine_v2/vote.go
+++ b/consensus/XDPoS/engines/engine_v2/vote.go
@@ -91,6 +91,9 @@ func (x *XDPoS_v2) voteHandler(chain consensus.ChainReader, voteMsg *types.Vote)
 		if err != nil {
 			return err
 		}
+
+		x.verifyVotes(chain, pooledVotes, proposedBlockHeader)
+
 		err = x.onVotePoolThresholdReached(chain, pooledVotes, voteMsg, proposedBlockHeader)
 		if err != nil {
 			return err
@@ -103,46 +106,53 @@ func (x *XDPoS_v2) voteHandler(chain consensus.ChainReader, voteMsg *types.Vote)
 	return nil
 }
 
-/*
-	Function that will be called by votePool when it reached threshold.
-	In the engine v2, we will need to generate and process QC
-*/
-func (x *XDPoS_v2) onVotePoolThresholdReached(chain consensus.ChainReader, pooledVotes map[common.Hash]utils.PoolObj, currentVoteMsg utils.PoolObj, proposedBlockHeader *types.Header) error {
-
-	masternodes := x.GetMasternodes(chain, proposedBlockHeader)
+func (x *XDPoS_v2) verifyVotes(chain consensus.ChainReader, votes map[common.Hash]utils.PoolObj, header *types.Header) {
+	masternodes := x.GetMasternodes(chain, header)
 	start := time.Now()
+	emptySigner := common.Address{}
 	// Filter out non-Master nodes signatures
 	var wg sync.WaitGroup
-	wg.Add(len(pooledVotes))
-	signatures := make([]types.Signature, len(pooledVotes))
-	counter := 0
-	for h, vote := range pooledVotes {
-		go func(hash common.Hash, v *types.Vote, i int) {
+	wg.Add(len(votes))
+	for h, vote := range votes {
+		go func(hash common.Hash, v *types.Vote) {
 			defer wg.Done()
+			if v.GetSigner() != emptySigner {
+				// verify before
+				return
+			}
 			signedVote := types.VoteSigHash(&types.VoteForSign{
 				ProposedBlockInfo: v.ProposedBlockInfo,
 				GapNumber:         v.GapNumber,
 			})
-			verified, _, err := x.verifyMsgSignature(signedVote, v.Signature, masternodes)
+			verified, masterNode, err := x.verifyMsgSignature(signedVote, v.Signature, masternodes)
 			if err != nil {
-				log.Warn("[onVotePoolThresholdReached] Skip not verified vote signatures when building QC", "error", err.Error())
-			} else if !verified {
-				log.Warn("[onVotePoolThresholdReached] Skip not verified vote signatures when building QC", "verified", verified)
-			} else {
-				signatures[i] = v.Signature
+				log.Warn("[verifyVotes] error while verifying vote signature", "error", err.Error())
+				return
 			}
-		}(h, vote.(*types.Vote), counter)
-		counter++
+
+			if !verified {
+				log.Warn("[verifyVotes] non-verified vote signature", "verified", verified)
+				return
+			}
+			v.SetSigner(masterNode)
+		}(h, vote.(*types.Vote))
 	}
 	wg.Wait()
 	elapsed := time.Since(start)
-	log.Debug("[onVotePoolThresholdReached] verify message signatures of vote pool took", "elapsed", elapsed)
+	log.Debug("[verifyVotes] verify message signatures of vote pool took", "elapsed", elapsed)
+}
 
+/*
+Function that will be called by votePool when it reached threshold.
+In the engine v2, we will need to generate and process QC
+*/
+func (x *XDPoS_v2) onVotePoolThresholdReached(chain consensus.ChainReader, pooledVotes map[common.Hash]utils.PoolObj, currentVoteMsg utils.PoolObj, proposedBlockHeader *types.Header) error {
 	// The signature list may contain empty entey. we only care the ones with values
 	var validSignatures []types.Signature
-	for _, v := range signatures {
-		if len(v) != 0 {
-			validSignatures = append(validSignatures, v)
+	emptySigner := common.Address{}
+	for _, vote := range pooledVotes {
+		if vote.GetSigner() != emptySigner {
+			validSignatures = append(validSignatures, vote.(*types.Vote).Signature)
 		}
 	}
 
@@ -247,3 +257,7 @@ func (x *XDPoS_v2) hygieneVotePool() {
 		}
 	}
 }
+
+func (x *XDPoS_v2) ReceivedVotes() map[string]map[common.Hash]utils.PoolObj {
+	return x.votePool.Get()
+}
diff --git a/consensus/XDPoS/utils/pool.go b/consensus/XDPoS/utils/pool.go
index 91b3e21653..3c35d37d8c 100644
--- a/consensus/XDPoS/utils/pool.go
+++ b/consensus/XDPoS/utils/pool.go
@@ -9,6 +9,7 @@ import (
 type PoolObj interface {
 	Hash() common.Hash
 	PoolKey() string
+	GetSigner() common.Address
 }
 type Pool struct {
 	objList map[string]map[common.Hash]PoolObj
@@ -20,6 +21,9 @@ func NewPool() *Pool {
 		objList: make(map[string]map[common.Hash]PoolObj),
 	}
 }
+func (p *Pool) Get() map[string]map[common.Hash]PoolObj {
+	return p.objList
+}
 
 // return true if it has reached threshold
 func (p *Pool) Add(obj PoolObj) (int, map[common.Hash]PoolObj) {
diff --git a/consensus/tests/engine_v2_tests/timeout_test.go b/consensus/tests/engine_v2_tests/timeout_test.go
index 5d78b99c59..0199249d16 100644
--- a/consensus/tests/engine_v2_tests/timeout_test.go
+++ b/consensus/tests/engine_v2_tests/timeout_test.go
@@ -248,6 +248,7 @@ func TestShouldVerifyTimeoutMessageForFirstV2Block(t *testing.T) {
 	}
 
 	verified, err := engineV2.VerifyTimeoutMessage(blockchain, timeoutMsg)
+	assert.Equal(t, timeoutMsg.GetSigner(), signer)
 	assert.Nil(t, err)
 	assert.True(t, verified)
 
@@ -263,6 +264,7 @@ func TestShouldVerifyTimeoutMessageForFirstV2Block(t *testing.T) {
 	}
 
 	verified, err = engineV2.VerifyTimeoutMessage(blockchain, timeoutMsg)
+	assert.Equal(t, timeoutMsg.GetSigner(), signer)
 	assert.Nil(t, err)
 	assert.True(t, verified)
 }
@@ -286,7 +288,7 @@ func TestShouldVerifyTimeoutMessage(t *testing.T) {
 	assert.True(t, verified)
 }
 
-func TestTimeoutPoolKeeyGoodHygiene(t *testing.T) {
+func TestTimeoutPoolKeyGoodHygiene(t *testing.T) {
 	blockchain, _, _, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, 905, params.TestXDPoSMockChainConfig, nil)
 	engineV2 := blockchain.Engine().(*XDPoS.XDPoS).EngineV2
 
diff --git a/consensus/tests/engine_v2_tests/vote_test.go b/consensus/tests/engine_v2_tests/vote_test.go
index 3a25034a8c..e9a1041e8a 100644
--- a/consensus/tests/engine_v2_tests/vote_test.go
+++ b/consensus/tests/engine_v2_tests/vote_test.go
@@ -136,6 +136,7 @@ func TestVoteMessageHandlerSuccessfullyGeneratedAndProcessQC(t *testing.T) {
 	assert.Equal(t, types.Round(5), currentRound)
 
 	// Create another vote which is signed by someone not from the master node list
+
 	randomSigner, randomSignFn, err := backends.SimulateWalletAddressAndSignFn()
 	assert.Nil(t, err)
 	randomlySignedHash, err := randomSignFn(accounts.Account{Address: randomSigner}, voteSigningHash.Bytes())
@@ -147,6 +148,7 @@ func TestVoteMessageHandlerSuccessfullyGeneratedAndProcessQC(t *testing.T) {
 	}
 	err = engineV2.VoteHandler(blockchain, voteMsg)
 	assert.Nil(t, err)
+
 	currentRound, lockQuorumCert, highestQuorumCert, _, _, _ = engineV2.GetPropertiesFaker()
 	// Still using the initlised value because we did not yet go to the next round
 	assert.Nil(t, lockQuorumCert)
@@ -506,6 +508,7 @@ func TestVerifyVoteMsg(t *testing.T) {
 	}
 
 	verified, err = engineV2.VerifyVoteMessage(blockchain, voteMsg)
+	assert.Equal(t, voteMsg.GetSigner(), signer)
 	assert.True(t, verified)
 	assert.Nil(t, err)
 }
diff --git a/core/types/consensus_v2.go b/core/types/consensus_v2.go
index 78a20e787b..fd2c181112 100644
--- a/core/types/consensus_v2.go
+++ b/core/types/consensus_v2.go
@@ -21,24 +21,64 @@ type BlockInfo struct {
 
 // Vote message in XDPoS 2.0
 type Vote struct {
+	signer            common.Address
 	ProposedBlockInfo *BlockInfo
 	Signature         Signature
 	GapNumber         uint64
 }
 
+func (v *Vote) Hash() common.Hash {
+	return rlpHash(v)
+}
+
+func (v *Vote) PoolKey() string {
+	// return the voted block hash
+	return fmt.Sprint(v.ProposedBlockInfo.Round, ":", v.GapNumber, ":", v.ProposedBlockInfo.Number, ":", v.ProposedBlockInfo.Hash.Hex())
+}
+
+func (v *Vote) GetSigner() common.Address {
+	return v.signer
+}
+
+func (v *Vote) SetSigner(signer common.Address) {
+	v.signer = signer
+}
+
 // Timeout message in XDPoS 2.0
 type Timeout struct {
+	signer    common.Address
 	Round     Round
 	Signature Signature
 	GapNumber uint64
 }
 
+func (t *Timeout) Hash() common.Hash {
+	return rlpHash(t)
+}
+
+func (t *Timeout) PoolKey() string {
+	// timeout pool key is round:gapNumber
+	return fmt.Sprint(t.Round, ":", t.GapNumber)
+}
+
+func (t *Timeout) GetSigner() common.Address {
+	return t.signer
+}
+
+func (t *Timeout) SetSigner(signer common.Address) {
+	t.signer = signer
+}
+
 // BFT Sync Info message in XDPoS 2.0
 type SyncInfo struct {
 	HighestQuorumCert  *QuorumCert
 	HighestTimeoutCert *TimeoutCert
 }
 
+func (s *SyncInfo) Hash() common.Hash {
+	return rlpHash(s)
+}
+
 // Quorum Certificate struct in XDPoS 2.0
 type QuorumCert struct {
 	ProposedBlockInfo *BlockInfo
@@ -60,12 +100,6 @@ type ExtraFields_v2 struct {
 	QuorumCert *QuorumCert
 }
 
-type EpochSwitchInfo struct {
-	Masternodes                []common.Address
-	EpochSwitchBlockInfo       *BlockInfo
-	EpochSwitchParentBlockInfo *BlockInfo
-}
-
 // Encode XDPoS 2.0 extra fields into bytes
 func (e *ExtraFields_v2) EncodeToBytes() ([]byte, error) {
 	bytes, err := rlp.EncodeToBytes(e)
@@ -76,16 +110,10 @@ func (e *ExtraFields_v2) EncodeToBytes() ([]byte, error) {
 	return append(versionByte, bytes...), nil
 }
 
-func (m *Vote) Hash() common.Hash {
-	return rlpHash(m)
-}
-
-func (m *Timeout) Hash() common.Hash {
-	return rlpHash(m)
-}
-
-func (m *SyncInfo) Hash() common.Hash {
-	return rlpHash(m)
+type EpochSwitchInfo struct {
+	Masternodes                []common.Address
+	EpochSwitchBlockInfo       *BlockInfo
+	EpochSwitchParentBlockInfo *BlockInfo
 }
 
 type VoteForSign struct {
@@ -105,13 +133,3 @@ type TimeoutForSign struct {
 func TimeoutSigHash(m *TimeoutForSign) common.Hash {
 	return rlpHash(m)
 }
-
-func (m *Vote) PoolKey() string {
-	// return the voted block hash
-	return fmt.Sprint(m.ProposedBlockInfo.Round, ":", m.GapNumber, ":", m.ProposedBlockInfo.Number, ":", m.ProposedBlockInfo.Hash.Hex())
-}
-
-func (m *Timeout) PoolKey() string {
-	// timeout pool key is round:gapNumber
-	return fmt.Sprint(m.Round, ":", m.GapNumber)
-}
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 724bbe9770..b5391628a7 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -427,7 +427,8 @@ func (s *PrivateAccountAPI) SignTransaction(ctx context.Context, args SendTxArgs
 // safely used to calculate a signature from.
 //
 // The hash is calulcated as
-//   keccak256("\x19Ethereum Signed Message:\n"${message length}${message}).
+//
+//	keccak256("\x19Ethereum Signed Message:\n"${message length}${message}).
 //
 // This gives context to the signed message and prevents signing of transactions.
 func signHash(data []byte) []byte {
@@ -1149,6 +1150,7 @@ func (s *PublicBlockChainAPI) EstimateGas(ctx context.Context, args CallArgs) (h
 
 		_, _, failed, err := s.doCall(ctx, args, rpc.LatestBlockNumber, vm.Config{}, 0)
 		if err != nil || failed {
+			log.Warn("[EstimateGas] api", "err", err)
 			return false
 		}
 		return true
@@ -1323,8 +1325,8 @@ func (s *PublicBlockChainAPI) findNearestSignedBlock(ctx context.Context, b *typ
 }
 
 /*
-	findFinalityOfBlock return finality of a block
-	Use blocksHashCache for to keep track - refer core/blockchain.go for more detail
+findFinalityOfBlock return finality of a block
+Use blocksHashCache for to keep track - refer core/blockchain.go for more detail
 */
 func (s *PublicBlockChainAPI) findFinalityOfBlock(ctx context.Context, b *types.Block, masternodes []common.Address) (uint, error) {
 	engine, _ := s.b.GetEngine().(*XDPoS.XDPoS)
@@ -1389,7 +1391,7 @@ func (s *PublicBlockChainAPI) findFinalityOfBlock(ctx context.Context, b *types.
 }
 
 /*
-	Extract signers from block
+Extract signers from block
 */
 func (s *PublicBlockChainAPI) getSigners(ctx context.Context, block *types.Block, engine *XDPoS.XDPoS) ([]common.Address, error) {
 	var err error
@@ -2979,7 +2981,8 @@ func GetSignersFromBlocks(b Backend, blockNumber uint64, blockHash common.Hash,
 // GetStakerROI Estimate ROI for stakers using the last epoc reward
 // then multiple by epoch per year, if the address is not masternode of last epoch - return 0
 // Formular:
-// 		ROI = average_latest_epoch_reward_for_voters*number_of_epoch_per_year/latest_total_cap*100
+//
+//	ROI = average_latest_epoch_reward_for_voters*number_of_epoch_per_year/latest_total_cap*100
 func (s *PublicBlockChainAPI) GetStakerROI() float64 {
 	blockNumber := s.b.CurrentBlock().Number().Uint64()
 	lastCheckpointNumber := blockNumber - (blockNumber % s.b.ChainConfig().XDPoS.Epoch) - s.b.ChainConfig().XDPoS.Epoch // calculate for 2 epochs ago
@@ -3005,7 +3008,8 @@ func (s *PublicBlockChainAPI) GetStakerROI() float64 {
 // GetStakerROIMasternode Estimate ROI for stakers of a specific masternode using the last epoc reward
 // then multiple by epoch per year, if the address is not masternode of last epoch - return 0
 // Formular:
-// 		ROI = latest_epoch_reward_for_voters*number_of_epoch_per_year/latest_total_cap*100
+//
+//	ROI = latest_epoch_reward_for_voters*number_of_epoch_per_year/latest_total_cap*100
 func (s *PublicBlockChainAPI) GetStakerROIMasternode(masternode common.Address) float64 {
 	votersReward := s.b.GetVotersRewards(masternode)
 	if votersReward == nil {
diff --git a/internal/web3ext/web3ext.go b/internal/web3ext/web3ext.go
index 8e368fc581..f80b2b6e0a 100644
--- a/internal/web3ext/web3ext.go
+++ b/internal/web3ext/web3ext.go
@@ -146,6 +146,16 @@ web3._extend({
 			params: 1,
 			inputFormatter: [web3._extend.formatters.inputBlockNumberFormatter]
 		}),
+		new web3._extend.Method({
+			name: 'getMasternodesByNumber',
+			call: 'XDPoS_getMasternodesByNumber',
+			params: 1,
+			inputFormatter: [web3._extend.formatters.inputBlockNumberFormatter]
+		}),
+		new web3._extend.Method({
+			name: 'getLatestPoolStatus',
+			call: 'XDPoS_getLatestPoolStatus'
+		}),
 	],
 	properties: [
 		new web3._extend.Property({