diff --git a/core/headerchain.go b/core/headerchain.go
index a5efb51831..2d1b0a2a18 100644
--- a/core/headerchain.go
+++ b/core/headerchain.go
@@ -33,7 +33,6 @@ import (
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/hashicorp/golang-lru"
-	"github.com/ethereum/go-ethereum/core/state"
 )
 
 const (
@@ -204,7 +203,7 @@ func (hc *HeaderChain) WriteHeader(header *types.Header) (status WriteStatus, er
 // header writes should be protected by the parent chain mutex individually.
 type WhCallback func(*types.Header) error
 
-func (hc *HeaderChain) ValidateHeaderChain(chain []*types.Header, state *state.StateDB, checkFreq int) (int, error) {
+func (hc *HeaderChain) ValidateHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
 	// Do a sanity check that the provided chain is actually ordered and linked
 	for i := 1; i < len(chain); i++ {
 		if chain[i].Number.Uint64() != chain[i-1].Number.Uint64()+1 || chain[i].ParentHash != chain[i-1].Hash() {
@@ -228,7 +227,7 @@ func (hc *HeaderChain) ValidateHeaderChain(chain []*types.Header, state *state.S
 	}
 	seals[len(seals)-1] = true // Last should always be verified to avoid junk
 
-	abort, results := hc.engine.VerifyHeaders(hc, state, chain, seals)
+	abort, results := hc.engine.VerifyHeaders(hc, chain, seals)
 	defer close(abort)
 
 	// Iterate over the headers and ensure they all check out
@@ -455,4 +454,4 @@ func (hc *HeaderChain) Engine() consensus.Engine { return hc.engine }
 // a header chain does not have blocks available for retrieval.
 func (hc *HeaderChain) GetBlock(hash common.Hash, number uint64) *types.Block {
 	return nil
-}
\ No newline at end of file
+}
diff --git a/core/state_processor.go b/core/state_processor.go
index 7f6ad40132..6ec3fcc6f1 100644
--- a/core/state_processor.go
+++ b/core/state_processor.go
@@ -73,9 +73,6 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
 	if p.config.DAOForkSupport && p.config.DAOForkBlock != nil && p.config.DAOForkBlock.Cmp(block.Number()) == 0 {
 		misc.ApplyDAOHardFork(statedb)
 	}
-	if p.config.IsTIPEVMSigner(header.Number) {
-		statedb.DeleteAddress(common.HexToAddress(common.BlockSigners))
-	}
 	InitSignerInTransactions(p.config, header, block.Transactions())
 	for i, tx := range block.Transactions() {
 		statedb.Prepare(tx.Hash(), block.Hash(), i)
@@ -104,9 +101,6 @@ func (p *StateProcessor) ProcessBlockNoValidator(cBlock *CalculatedBlock, stated
 	if p.config.DAOForkSupport && p.config.DAOForkBlock != nil && p.config.DAOForkBlock.Cmp(block.Number()) == 0 {
 		misc.ApplyDAOHardFork(statedb)
 	}
-	if p.config.IsTIPEVMSigner(header.Number) {
-		statedb.DeleteAddress(common.HexToAddress(common.BlockSigners))
-	}
 	if cBlock.stop {
 		return nil, nil, 0, ErrStopPreparingBlock
 	}
@@ -138,9 +132,6 @@ func (p *StateProcessor) ProcessBlockNoValidator(cBlock *CalculatedBlock, stated
 // for the transaction, gas used and an error if the transaction failed,
 // indicating the block was invalid.
 func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, uint64, error) {
-	if tx.To() != nil && tx.To().String() == common.BlockSigners && config.IsTIPEVMSigner(header.Number) {
-		return ApplySignTransaction(config, statedb, header, tx, usedGas)
-	}
 	msg, err := tx.AsMessage(types.MakeSigner(config, header.Number))
 	if err != nil {
 		return nil, 0, err
@@ -180,41 +171,6 @@ func ApplyTransaction(config *params.ChainConfig, bc *BlockChain, author *common
 	return receipt, gas, err
 }
 
-func ApplySignTransaction(config *params.ChainConfig, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64) (*types.Receipt, uint64, error) {
-	// Update the state with pending changes
-	var root []byte
-	if config.IsByzantium(header.Number) {
-		statedb.Finalise(true)
-	} else {
-		root = statedb.IntermediateRoot(config.IsEIP158(header.Number)).Bytes()
-	}
-	from, err := types.Sender(types.MakeSigner(config, header.Number), tx)
-	if err != nil {
-		return nil, 0, err
-	}
-	nonce := statedb.GetNonce(from)
-	if nonce < tx.Nonce() {
-		return nil, 0, ErrNonceTooHigh
-	} else if nonce > tx.Nonce() {
-		return nil, 0, ErrNonceTooLow
-	}
-	statedb.SetNonce(from, nonce+1)
-	// Create a new receipt for the transaction, storing the intermediate root and gas used by the tx
-	// based on the eip phase, we're passing wether the root touch-delete accounts.
-	receipt := types.NewReceipt(root, false, *usedGas)
-	receipt.TxHash = tx.Hash()
-	receipt.GasUsed = 0
-	// if the transaction created a contract, store the creation address in the receipt.
-	// Set the receipt logs and create a bloom for filtering
-	log := &types.Log{}
-	log.Address = common.HexToAddress(common.BlockSigners)
-	log.BlockNumber = header.Number.Uint64()
-	statedb.AddLog(log)
-	receipt.Logs = statedb.GetLogs(tx.Hash())
-	receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
-	return receipt, 0, nil
-}
-
 func InitSignerInTransactions(config *params.ChainConfig, header *types.Header, txs types.Transactions) {
 	nWorker := runtime.NumCPU()
 	signer := types.MakeSigner(config, header.Number)
@@ -239,4 +195,4 @@ func InitSignerInTransactions(config *params.ChainConfig, header *types.Header,
 		}(from, to)
 	}
 	wg.Wait()
-}
\ No newline at end of file
+}
diff --git a/core/state_transition.go b/core/state_transition.go
index af558bbc7c..b19bc12e42 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -33,8 +33,10 @@ var (
 
 /*
 The State Transitioning Model
+
 A state transition is a change made when a transaction is applied to the current world state
 The state transitioning model does all all the necessary work to work out a valid new state root.
+
 1) Nonce handling
 2) Pre pay gas
 3) Create a new state object if the recipient is \0*32
@@ -227,22 +229,15 @@ func (st *StateTransition) TransitionDb() (ret []byte, usedGas uint64, failed bo
 		// error.
 		vmerr error
 	)
-	// for debugging purpose
-	// TODO: clean it after fixing the issue https://github.com/XDCchain/XDCchain/issues/401
-	var contractAction string
-	nonce := uint64(1)
 	if contractCreation {
 		ret, _, st.gas, vmerr = evm.Create(sender, st.data, st.gas, st.value)
-		contractAction = "contract creation"
 	} else {
 		// Increment the nonce for the next transaction
-		nonce = st.state.GetNonce(sender.Address()) + 1
-		st.state.SetNonce(sender.Address(), nonce)
+		st.state.SetNonce(sender.Address(), st.state.GetNonce(sender.Address())+1)
 		ret, st.gas, vmerr = evm.Call(sender, st.to().Address(), st.data, st.gas, st.value)
-		contractAction = "contract call"
 	}
 	if vmerr != nil {
-		log.Debug("VM returned with error", "action", contractAction, "contract address", st.to().Address(), "gas", st.gas, "gasPrice", st.gasPrice, "nonce", nonce, "err", vmerr)
+		log.Debug("VM returned with error", "err", vmerr)
 		// The only possible consensus-error would be if there wasn't
 		// sufficient balance to make the transfer happen. The first
 		// balance transfer may never fail.
@@ -278,4 +273,4 @@ func (st *StateTransition) refundGas() {
 // gasUsed returns the amount of gas used up by the state transition.
 func (st *StateTransition) gasUsed() uint64 {
 	return st.initialGas - st.gas
-}
\ No newline at end of file
+}