diff --git a/pkg/client/account.go b/pkg/client/account.go
index 9a844470..9688aa00 100644
--- a/pkg/client/account.go
+++ b/pkg/client/account.go
@@ -24,7 +24,7 @@ func (g *GrpcClient) GetAccount(addr string) (*core.Account, error) {
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	acc, err := g.Client.GetAccount(ctx, account)
@@ -47,7 +47,7 @@ func (g *GrpcClient) GetAccountNet(addr string) (*api.AccountNetMessage, error)
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetAccountNet(ctx, account)
@@ -64,7 +64,7 @@ func (g *GrpcClient) CreateAccount(from, addr string) (*api.TransactionExtention
 	if contract.AccountAddress, err = common.DecodeCheck(addr); err != nil {
 		return nil, err
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.CreateAccount2(ctx, contract)
@@ -89,7 +89,7 @@ func (g *GrpcClient) UpdateAccount(from, accountName string) (*api.TransactionEx
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.UpdateAccount2(ctx, contract)
@@ -210,7 +210,7 @@ func (g *GrpcClient) WithdrawBalance(from string) (*api.TransactionExtention, er
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.WithdrawBalance2(ctx, contract)
@@ -351,7 +351,7 @@ func (g *GrpcClient) UpdateAccountPermission(from string, owner, witness map[str
 		contract.Witness = witnessPermission
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.AccountPermissionUpdate(ctx, contract)
diff --git a/pkg/client/assets.go b/pkg/client/assets.go
index efb9419b..0b9b3858 100644
--- a/pkg/client/assets.go
+++ b/pkg/client/assets.go
@@ -23,7 +23,7 @@ func (g *GrpcClient) GetAssetIssueByAccount(address string) (*api.AssetIssueList
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetAssetIssueByAccount(ctx, account)
@@ -31,7 +31,7 @@ func (g *GrpcClient) GetAssetIssueByAccount(address string) (*api.AssetIssueList
 
 // GetAssetIssueByName list asset issued by name
 func (g *GrpcClient) GetAssetIssueByName(name string) (*core.AssetIssueContract, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetAssetIssueByName(ctx, GetMessageBytes([]byte(name)))
@@ -41,7 +41,7 @@ func (g *GrpcClient) GetAssetIssueByName(name string) (*core.AssetIssueContract,
 func (g *GrpcClient) GetAssetIssueByID(tokenID string) (*core.AssetIssueContract, error) {
 	bn := new(big.Int).SetBytes([]byte(tokenID))
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetAssetIssueById(ctx, GetMessageBytes(bn.Bytes()))
@@ -49,7 +49,7 @@ func (g *GrpcClient) GetAssetIssueByID(tokenID string) (*core.AssetIssueContract
 
 // GetAssetIssueList list all TRC10
 func (g *GrpcClient) GetAssetIssueList(page int64, limit ...int) (*api.AssetIssueList, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	if page == -1 {
@@ -136,7 +136,7 @@ func (g *GrpcClient) AssetIssue(from, name, description, abbr, urlStr string,
 			FrozenSupply, assetIssueContractFrozenSupply)
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.CreateAssetIssue2(ctx, contract)
@@ -167,7 +167,7 @@ func (g *GrpcClient) UpdateAssetIssue(from, description, urlStr string,
 	contract.NewLimit = newLimit
 	contract.NewPublicLimit = newPublicLimit
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.UpdateAsset2(ctx, contract)
@@ -198,7 +198,7 @@ func (g *GrpcClient) TransferAsset(from, toAddress,
 	contract.AssetName = []byte(assetName)
 	contract.Amount = amount
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.TransferAsset2(ctx, contract)
@@ -229,7 +229,7 @@ func (g *GrpcClient) ParticipateAssetIssue(from, issuerAddress,
 	contract.AssetName = []byte(tokenID)
 	contract.Amount = amount
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.ParticipateAssetIssue2(ctx, contract)
@@ -253,7 +253,7 @@ func (g *GrpcClient) UnfreezeAsset(from string) (*api.TransactionExtention, erro
 	if contract.OwnerAddress, err = common.DecodeCheck(from); err != nil {
 		return nil, err
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.UnfreezeAsset2(ctx, contract)
diff --git a/pkg/client/bank.go b/pkg/client/bank.go
index 5722f978..0cd6d86e 100644
--- a/pkg/client/bank.go
+++ b/pkg/client/bank.go
@@ -31,7 +31,7 @@ func (g *GrpcClient) FreezeBalance(from, delegateTo string,
 	}
 	contract.Resource = resource
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.FreezeBalance2(ctx, contract)
@@ -64,7 +64,7 @@ func (g *GrpcClient) UnfreezeBalance(from, delegateTo string, resource core.Reso
 	}
 	contract.Resource = resource
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.UnfreezeBalance2(ctx, contract)
diff --git a/pkg/client/block.go b/pkg/client/block.go
index 66b34054..759176bc 100644
--- a/pkg/client/block.go
+++ b/pkg/client/block.go
@@ -11,7 +11,7 @@ import (
 
 // GetNowBlock return TIP block
 func (g *GrpcClient) GetNowBlock() (*api.BlockExtention, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	result, err := g.Client.GetNowBlock2(ctx, new(api.EmptyMessage))
@@ -28,7 +28,7 @@ func (g *GrpcClient) GetBlockByNum(num int64) (*api.BlockExtention, error) {
 	numMessage := new(api.NumberMessage)
 	numMessage.Num = num
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	result, err := g.Client.GetBlockByNum2(ctx, numMessage)
@@ -45,7 +45,7 @@ func (g *GrpcClient) GetBlockInfoByNum(num int64) (*api.TransactionInfoList, err
 	numMessage := new(api.NumberMessage)
 	numMessage.Num = num
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	result, err := g.Client.GetTransactionInfoByBlockNum(ctx, numMessage)
@@ -67,7 +67,7 @@ func (g *GrpcClient) GetBlockByID(id string) (*core.Block, error) {
 		return nil, fmt.Errorf("get block by id: %v", err)
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetBlockById(ctx, blockID)
@@ -79,7 +79,7 @@ func (g *GrpcClient) GetBlockByLimitNext(start, end int64) (*api.BlockListExtent
 	blockLimit.StartNum = start
 	blockLimit.EndNum = end
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetBlockByLimitNext2(ctx, blockLimit)
@@ -90,7 +90,7 @@ func (g *GrpcClient) GetBlockByLatestNum(num int64) (*api.BlockListExtention, er
 	numMessage := new(api.NumberMessage)
 	numMessage.Num = num
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetBlockByLatestNum2(ctx, numMessage)
diff --git a/pkg/client/client.go b/pkg/client/client.go
index 6b607e25..4eb84a6f 100644
--- a/pkg/client/client.go
+++ b/pkg/client/client.go
@@ -8,22 +8,37 @@ import (
 	"google.golang.org/grpc"
 )
 
-const grpcTimeout = 5 * time.Second
-
 // GrpcClient controller structure
 type GrpcClient struct {
-	Address string
-	Conn    *grpc.ClientConn
-	Client  api.WalletClient
+	Address     string
+	Conn        *grpc.ClientConn
+	Client      api.WalletClient
+	grpcTimeout time.Duration
 }
 
 // NewGrpcClient create grpc controller
 func NewGrpcClient(address string) *GrpcClient {
-	client := new(GrpcClient)
-	client.Address = address
+	client := &GrpcClient{
+		Address:     address,
+		grpcTimeout: 5 * time.Second,
+	}
+	return client
+}
+
+// NewGrpcClientWithTimeout create grpc controller
+func NewGrpcClientWithTimeout(address string, timeout time.Duration) *GrpcClient {
+	client := &GrpcClient{
+		Address:     address,
+		grpcTimeout: timeout,
+	}
 	return client
 }
 
+// SetTimeout for Client connections
+func (g *GrpcClient) SetTimeout(timeout time.Duration) {
+	g.grpcTimeout = timeout
+}
+
 // Start initiate grpc  connection
 func (g *GrpcClient) Start() error {
 	var err error
diff --git a/pkg/client/contracts.go b/pkg/client/contracts.go
index f5edd661..4f9091d2 100644
--- a/pkg/client/contracts.go
+++ b/pkg/client/contracts.go
@@ -50,7 +50,7 @@ func (g *GrpcClient) TriggerConstantContract(from, contractAddress, method, json
 
 // triggerConstantContract and return tx result
 func (g *GrpcClient) triggerConstantContract(ct *core.TriggerSmartContract) (*api.TransactionExtention, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.TriggerConstantContract(ctx, ct)
@@ -100,7 +100,7 @@ func (g *GrpcClient) TriggerContract(from, contractAddress, method, jsonString s
 
 // triggerContract and return tx result
 func (g *GrpcClient) triggerContract(ct *core.TriggerSmartContract, feeLimit int64) (*api.TransactionExtention, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.TriggerContract(ctx, ct)
@@ -156,7 +156,7 @@ func (g *GrpcClient) DeployContract(from, contractName string,
 		},
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.DeployContract(ctx, ct)
@@ -193,7 +193,7 @@ func (g *GrpcClient) GetContractABI(contractAddress string) (*core.SmartContract
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	sm, err := g.Client.GetContract(ctx, GetMessageBytes(contractDesc))
diff --git a/pkg/client/exchange.go b/pkg/client/exchange.go
index 9dd4fdde..9cb686bd 100644
--- a/pkg/client/exchange.go
+++ b/pkg/client/exchange.go
@@ -13,7 +13,7 @@ import (
 
 // ExchangeList of bancor TRC10, use page -1 to list all
 func (g *GrpcClient) ExchangeList(page int64, limit ...int) (*api.ExchangeList, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	if page == -1 {
@@ -29,7 +29,7 @@ func (g *GrpcClient) ExchangeList(page int64, limit ...int) (*api.ExchangeList,
 
 // ExchangeByID returns exchangeDetails
 func (g *GrpcClient) ExchangeByID(id int64) (*core.Exchange, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 	bID := make([]byte, 8)
 	binary.BigEndian.PutUint64(bID, uint64(id))
@@ -64,7 +64,7 @@ func (g *GrpcClient) ExchangeCreate(
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.ExchangeCreate(ctx, contract)
@@ -98,7 +98,7 @@ func (g *GrpcClient) ExchangeInject(
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.ExchangeInject(ctx, contract)
@@ -132,7 +132,7 @@ func (g *GrpcClient) ExchangeWithdraw(
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.ExchangeWithdraw(ctx, contract)
@@ -168,7 +168,7 @@ func (g *GrpcClient) ExchangeTrade(
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.ExchangeTransaction(ctx, contract)
diff --git a/pkg/client/network.go b/pkg/client/network.go
index 2a912dfd..5a18e3bb 100644
--- a/pkg/client/network.go
+++ b/pkg/client/network.go
@@ -14,7 +14,7 @@ import (
 
 // ListNodes provides list of network nodes
 func (g *GrpcClient) ListNodes() (*api.NodeList, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	nodeList, err := g.Client.ListNodes(ctx, new(api.EmptyMessage))
@@ -26,7 +26,7 @@ func (g *GrpcClient) ListNodes() (*api.NodeList, error) {
 
 // GetNextMaintenanceTime get next epoch timestamp
 func (g *GrpcClient) GetNextMaintenanceTime() (*api.NumberMessage, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetNextMaintenanceTime(ctx,
@@ -35,7 +35,7 @@ func (g *GrpcClient) GetNextMaintenanceTime() (*api.NumberMessage, error) {
 
 // TotalTransaction return total transciton in network
 func (g *GrpcClient) TotalTransaction() (*api.NumberMessage, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.TotalTransaction(ctx,
@@ -52,7 +52,7 @@ func (g *GrpcClient) GetTransactionByID(id string) (*core.Transaction, error) {
 		return nil, fmt.Errorf("get transaction by id error: %v", err)
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.GetTransactionById(ctx, transactionID)
@@ -75,7 +75,7 @@ func (g *GrpcClient) GetTransactionInfoByID(id string) (*core.TransactionInfo, e
 		return nil, fmt.Errorf("get transaction by id error: %v", err)
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	txi, err := g.Client.GetTransactionInfoById(ctx, transactionID)
@@ -90,7 +90,7 @@ func (g *GrpcClient) GetTransactionInfoByID(id string) (*core.TransactionInfo, e
 
 // Broadcast broadcast TX
 func (g *GrpcClient) Broadcast(tx *core.Transaction) (*api.Return, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 	result, err := g.Client.BroadcastTransaction(ctx, tx)
 	if err != nil {
@@ -107,7 +107,7 @@ func (g *GrpcClient) Broadcast(tx *core.Transaction) (*api.Return, error) {
 
 // GetNodeInfo current connection
 func (g *GrpcClient) GetNodeInfo() (*core.NodeInfo, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetNodeInfo(ctx, new(api.EmptyMessage))
diff --git a/pkg/client/proposal.go b/pkg/client/proposal.go
index 5053db7a..1a50b09d 100644
--- a/pkg/client/proposal.go
+++ b/pkg/client/proposal.go
@@ -12,7 +12,7 @@ import (
 
 // ProposalsList return all network proposals
 func (g *GrpcClient) ProposalsList() (*api.ProposalList, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.ListProposals(ctx, new(api.EmptyMessage))
@@ -29,7 +29,7 @@ func (g *GrpcClient) ProposalCreate(from string, parameters map[int64]int64) (*a
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.ProposalCreate(ctx, contract)
@@ -57,7 +57,7 @@ func (g *GrpcClient) ProposalApprove(from string, id int64, confirm bool) (*api.
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.ProposalApprove(ctx, contract)
diff --git a/pkg/client/resources.go b/pkg/client/resources.go
index 2b05e761..c3a9dee0 100644
--- a/pkg/client/resources.go
+++ b/pkg/client/resources.go
@@ -18,7 +18,7 @@ func (g *GrpcClient) GetAccountResource(addr string) (*api.AccountResourceMessag
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.GetAccountResource(ctx, account)
@@ -30,7 +30,7 @@ func (g *GrpcClient) GetDelegatedResources(address string) ([]*api.DelegatedReso
 	if err != nil {
 		return nil, err
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	ai, err := g.Client.GetDelegatedResourceAccountIndex(ctx, GetMessageBytes(addrBytes))
diff --git a/pkg/client/transfer.go b/pkg/client/transfer.go
index b2a610ff..e9fb1209 100644
--- a/pkg/client/transfer.go
+++ b/pkg/client/transfer.go
@@ -23,7 +23,7 @@ func (g *GrpcClient) Transfer(from, toAddress string, amount int64) (*api.Transa
 	}
 	contract.Amount = amount
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.CreateTransaction2(ctx, contract)
diff --git a/pkg/client/witnesses.go b/pkg/client/witnesses.go
index 2ede3328..f272ae34 100644
--- a/pkg/client/witnesses.go
+++ b/pkg/client/witnesses.go
@@ -12,7 +12,7 @@ import (
 
 // ListWitnesses return all witnesses
 func (g *GrpcClient) ListWitnesses() (*api.WitnessList, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	return g.Client.ListWitnesses(ctx, new(api.EmptyMessage))
@@ -29,7 +29,7 @@ func (g *GrpcClient) CreateWitness(from, urlStr string) (*api.TransactionExtenti
 		return nil, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.CreateWitness2(ctx, contract)
@@ -55,7 +55,7 @@ func (g *GrpcClient) UpdateWitness(from, urlStr string) (*api.TransactionExtenti
 	}
 	contract.UpdateUrl = []byte(urlStr)
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.UpdateWitness2(ctx, contract)
@@ -94,7 +94,7 @@ func (g *GrpcClient) VoteWitnessAccount(from string,
 		}
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	tx, err := g.Client.VoteWitnessAccount2(ctx, contract)
@@ -117,7 +117,7 @@ func (g *GrpcClient) GetWitnessBrokerage(witness string) (float64, error) {
 		return 0, err
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), grpcTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), g.grpcTimeout)
 	defer cancel()
 
 	result, err := g.Client.GetBrokerageInfo(ctx, GetMessageBytes(addr))