diff --git a/contracts/utils.go b/contracts/utils.go
index 2aa2a3228d..d26c761546 100644
--- a/contracts/utils.go
+++ b/contracts/utils.go
@@ -13,6 +13,8 @@ import (
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/params"
 	"math/big"
+	"github.com/ethereum/go-ethereum/node"
+	"github.com/ethereum/go-ethereum/ethclient"
 )
 
 const (
diff --git a/eth/backend.go b/eth/backend.go
index d1bf4eb8f8..2357ed9e9e 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -189,9 +189,6 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 	if eth.chainConfig.Clique != nil {
 		c := eth.engine.(*clique.Clique)
 
-		// Set global ipc endpoint.
-		eth.IPCEndpoint = ctx.GetConfig().IPCEndpoint()
-
 		// Inject hook for send tx sign to smartcontract after insert block into chain.
 		importedHook := func(block *types.Block) {
 			snap, err := c.GetSnapshot(eth.blockchain, block.Header())
@@ -216,7 +213,6 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
 
 				return err
 			}
-
 			number := header.Number.Uint64()
 			rCheckpoint := chain.Config().Clique.RewardCheckpoint
 			if number > 0 && number-rCheckpoint > 0 {
@@ -471,9 +467,9 @@ func (s *Ethereum) StartStaking(local bool) error {
 	return nil
 }
 
-func (s *Ethereum) StopStaking()         { s.miner.Stop() }
-func (s *Ethereum) IsStaking() bool      { return s.miner.Mining() }
-func (s *Ethereum) Miner() *miner.Miner  { return s.miner }
+func (s *Ethereum) StopStaking()        { s.miner.Stop() }
+func (s *Ethereum) IsStaking() bool     { return s.miner.Mining() }
+func (s *Ethereum) Miner() *miner.Miner { return s.miner }
 
 func (s *Ethereum) AccountManager() *accounts.Manager  { return s.accountManager }
 func (s *Ethereum) BlockChain() *core.BlockChain       { return s.blockchain }