diff --git a/.ci/hello/HelloWorld.go b/.ci/hello/HelloWorld.go
index acc9b05f..1393ceee 100644
--- a/.ci/hello/HelloWorld.go
+++ b/.ci/hello/HelloWorld.go
@@ -299,11 +299,11 @@ type HelloWorldSetValue struct {
 // WatchSetValue is a free log subscription operation binding the contract event 0x1cede41e194608a414a2e1d67987cf390338e67d0ff22be86dee2f3737c23d53.
 //
 // Solidity: event setValue(string v, address indexed from, address indexed to, uint256 value)
-func (_HelloWorld *HelloWorldFilterer) WatchSetValue(fromBlock *uint64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
+func (_HelloWorld *HelloWorldFilterer) WatchSetValue(fromBlock *int64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
 	return _HelloWorld.contract.WatchLogs(fromBlock, handler, "setValue", from, to)
 }
 
-func (_HelloWorld *HelloWorldFilterer) WatchAllSetValue(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_HelloWorld *HelloWorldFilterer) WatchAllSetValue(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _HelloWorld.contract.WatchLogs(fromBlock, handler, "setValue")
 }
 
@@ -321,11 +321,11 @@ func (_HelloWorld *HelloWorldFilterer) ParseSetValue(log types.Log) (*HelloWorld
 // WatchSetValue is a free log subscription operation binding the contract event 0x1cede41e194608a414a2e1d67987cf390338e67d0ff22be86dee2f3737c23d53.
 //
 // Solidity: event setValue(string v, address indexed from, address indexed to, uint256 value)
-func (_HelloWorld *HelloWorldSession) WatchSetValue(fromBlock *uint64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
+func (_HelloWorld *HelloWorldSession) WatchSetValue(fromBlock *int64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
 	return _HelloWorld.Contract.WatchSetValue(fromBlock, handler, from, to)
 }
 
-func (_HelloWorld *HelloWorldSession) WatchAllSetValue(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_HelloWorld *HelloWorldSession) WatchAllSetValue(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _HelloWorld.Contract.WatchAllSetValue(fromBlock, handler)
 }
 
diff --git a/.ci/store/Store.go b/.ci/store/Store.go
index ebf8e5ed..01689e97 100644
--- a/.ci/store/Store.go
+++ b/.ci/store/Store.go
@@ -294,11 +294,11 @@ type StoreItemSet struct {
 // WatchItemSet is a free log subscription operation binding the contract event 0xe79e73da417710ae99aa2088575580a60415d359acfad9cdd3382d59c80281d4.
 //
 // Solidity: event ItemSet(bytes32 key, bytes32 value)
-func (_Store *StoreFilterer) WatchItemSet(fromBlock *uint64, handler func(int, []types.Log)) error {
+func (_Store *StoreFilterer) WatchItemSet(fromBlock *int64, handler func(int, []types.Log)) error {
 	return _Store.contract.WatchLogs(fromBlock, handler, "ItemSet")
 }
 
-func (_Store *StoreFilterer) WatchAllItemSet(fromBlock *uint64, handler func(int, []types.Log)) error {
+func (_Store *StoreFilterer) WatchAllItemSet(fromBlock *int64, handler func(int, []types.Log)) error {
 	return _Store.contract.WatchLogs(fromBlock, handler, "ItemSet")
 }
 
@@ -316,11 +316,11 @@ func (_Store *StoreFilterer) ParseItemSet(log types.Log) (*StoreItemSet, error)
 // WatchItemSet is a free log subscription operation binding the contract event 0xe79e73da417710ae99aa2088575580a60415d359acfad9cdd3382d59c80281d4.
 //
 // Solidity: event ItemSet(bytes32 key, bytes32 value)
-func (_Store *StoreSession) WatchItemSet(fromBlock *uint64, handler func(int, []types.Log)) error {
+func (_Store *StoreSession) WatchItemSet(fromBlock *int64, handler func(int, []types.Log)) error {
 	return _Store.Contract.WatchItemSet(fromBlock, handler)
 }
 
-func (_Store *StoreSession) WatchAllItemSet(fromBlock *uint64, handler func(int, []types.Log)) error {
+func (_Store *StoreSession) WatchAllItemSet(fromBlock *int64, handler func(int, []types.Log)) error {
 	return _Store.Contract.WatchAllItemSet(fromBlock, handler)
 }
 
diff --git a/README.md b/README.md
index 57cc9af1..fce2d3a6 100644
--- a/README.md
+++ b/README.md
@@ -164,6 +164,7 @@ cp .ci/hello/HelloWorld.sol ./hello
 
 ```bash
 # 国密请使用 ./abigen --bin ./hello/HelloWorld.bin --abi ./hello/HelloWorld.abi --pkg hello --type HelloWorld --out ./hello/HelloWorld.go --smcrypto=true
+# 注意：国密模式，请使用国密solc编译得到bin
 ./abigen --bin ./hello/HelloWorld.bin --abi ./hello/HelloWorld.abi --pkg hello --type HelloWorld --out ./hello/HelloWorld.go
 ```
 
@@ -243,7 +244,12 @@ func main() {
         return
     }
     done := make(chan bool)
-    _, err = helloSession.WatchAllSetValue(nil, func(ret int, logs []types.Log) {
+    currentBlock, err := client.GetBlockNumber(context.Background())
+    if err != nil {
+        fmt.Printf("GetBlockNumber() failed: %v", err)
+        return
+    }
+    _, err = helloSession.WatchAllSetValue(&currentBlock, func(ret int, logs []types.Log) {
         fmt.Printf("WatchAllSetValue receive statud: %d, logs: %v\n", ret, logs)
         setValue, err := helloSession.ParseSetValue(logs[0])
         if err != nil {
diff --git a/v3/abi/bind/base.go b/v3/abi/bind/base.go
index 53a8c4f6..4238ad29 100755
--- a/v3/abi/bind/base.go
+++ b/v3/abi/bind/base.go
@@ -248,7 +248,7 @@ func (c *BoundContract) asyncTransact(opts *TransactOpts, contract *common.Addre
 
 // WatchLogs filters subscribes to contract logs for future blocks, returning a
 // subscription object that can be used to tear down the watcher.
-func (c *BoundContract) WatchLogs(fromBlock *uint64, handler func(int, []types.Log), name string, query ...interface{}) (string, error) {
+func (c *BoundContract) WatchLogs(fromBlock *int64, handler func(int, []types.Log), name string, query ...interface{}) (string, error) {
 	from := int64(1)
 	to := int64(-1)
 	// Don't crash on a lazy user
diff --git a/v3/abi/bind/template.go b/v3/abi/bind/template.go
index e61138d6..5e0e7f1b 100644
--- a/v3/abi/bind/template.go
+++ b/v3/abi/bind/template.go
@@ -400,11 +400,11 @@ var (
 		// Watch{{.Normalized.Name}} is a free log subscription operation binding the contract event 0x{{printf "%x" .Original.ID}}.
 		//
 		// Solidity: {{formatevent .Original $structs}}
-		func (_{{$contract.Type}} *{{$contract.Type}}Filterer) Watch{{.Normalized.Name}}(fromBlock *uint64, handler func(int, []types.Log){{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}} {{bindtype .Type $structs}}{{end}}{{end}}) (string, error) {
+		func (_{{$contract.Type}} *{{$contract.Type}}Filterer) Watch{{.Normalized.Name}}(fromBlock *int64, handler func(int, []types.Log){{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}} {{bindtype .Type $structs}}{{end}}{{end}}) (string, error) {
 			return _{{$contract.Type}}.contract.WatchLogs(fromBlock, handler, "{{.Original.Name}}"{{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}}{{end}}{{end}})
 		}
 
-		func (_{{$contract.Type}} *{{$contract.Type}}Filterer) WatchAll{{.Normalized.Name}}(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+		func (_{{$contract.Type}} *{{$contract.Type}}Filterer) WatchAll{{.Normalized.Name}}(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 			return _{{$contract.Type}}.contract.WatchLogs(fromBlock, handler, "{{.Original.Name}}")
 		}
 
@@ -422,11 +422,11 @@ var (
 		// Watch{{.Normalized.Name}} is a free log subscription operation binding the contract event 0x{{printf "%x" .Original.ID}}.
 		//
 		// Solidity: {{formatevent .Original $structs}}
-		func (_{{$contract.Type}} *{{$contract.Type}}Session) Watch{{.Normalized.Name}}(fromBlock *uint64, handler func(int, []types.Log){{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}} {{bindtype .Type $structs}}{{end}}{{end}}) (string, error)  {
+		func (_{{$contract.Type}} *{{$contract.Type}}Session) Watch{{.Normalized.Name}}(fromBlock *int64, handler func(int, []types.Log){{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}} {{bindtype .Type $structs}}{{end}}{{end}}) (string, error)  {
 			return _{{$contract.Type}}.Contract.Watch{{.Normalized.Name}}(fromBlock, handler {{range .Normalized.Inputs}}{{if .Indexed}}, {{.Name}}{{end}}{{end}})
 		}
 
-		func (_{{$contract.Type}} *{{$contract.Type}}Session) WatchAll{{.Normalized.Name}}(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+		func (_{{$contract.Type}} *{{$contract.Type}}Session) WatchAll{{.Normalized.Name}}(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 			return _{{$contract.Type}}.Contract.WatchAll{{.Normalized.Name}}(fromBlock, handler)
 		}
 
diff --git a/v3/client/config.go b/v3/client/config.go
index 18a9a142..c4a697eb 100644
--- a/v3/client/config.go
+++ b/v3/client/config.go
@@ -37,11 +37,11 @@ func ParseConfigOptions(caFile string, key string, cert, keyFile string, groupId
 	if err != nil {
 		return nil, fmt.Errorf("parse private key failed, err: %v", err)
 	}
-	if config.IsSMCrypto && curve != sm2p256v1 {
-		return nil, fmt.Errorf("smcrypto must use sm2p256v1 private key, but found %s", curve)
+	if config.IsSMCrypto && curve != Sm2p256v1 {
+		return nil, fmt.Errorf("smcrypto should use sm2p256v1 private key, but found %s", curve)
 	}
-	if !config.IsSMCrypto && curve != secp256k1 {
-		return nil, fmt.Errorf("must use secp256k1 private key, but found %s", curve)
+	if !config.IsSMCrypto && curve != Secp256k1 {
+		return nil, fmt.Errorf("must should secp256k1 private key, but found %s", curve)
 	}
 	config.PrivateKey = keyBytes
 	return &config, nil
diff --git a/v3/client/parse_pem.go b/v3/client/parse_pem.go
index 6649a969..72cfb708 100644
--- a/v3/client/parse_pem.go
+++ b/v3/client/parse_pem.go
@@ -11,8 +11,8 @@ import (
 )
 
 const (
-	secp256k1 = "secp256k1"
-	sm2p256v1 = "sm2p256v1"
+	Secp256k1 = "secp256k1"
+	Sm2p256v1 = "sm2p256v1"
 )
 
 var (
diff --git a/v3/cmd/commandline/commands.go b/v3/cmd/commandline/commands.go
index 5d857dd5..18e287e2 100644
--- a/v3/cmd/commandline/commands.go
+++ b/v3/cmd/commandline/commands.go
@@ -56,7 +56,7 @@ const (
 // and reset your terminal to use autocompletion.`,
 // 	Run: func(cmd *cobra.Command, args []string) {
 // 		rootCmd.GenZshCompletionFile("_console");
-// 		fmt.Println("zsh file _console had created on your current diretory successfully.")
+// 		fmt.Println("zsh file _console had created on your current directory successfully.")
 // 	},
 // }
 
@@ -89,8 +89,8 @@ The block height is encoded in hex`,
 	},
 }
 
-var getPbftViewCmd = &cobra.Command{
-	Use:   "getPbftView",
+var getPBFTViewCmd = &cobra.Command{
+	Use:   "getPBFTView",
 	Short: "                                   Get the latest PBFT view(PBFT consensus only)",
 	Long: `Returns the latest PBFT view in the specified group where the node is located.
 The PBFT view is encoded in hex`,
@@ -376,7 +376,7 @@ For more information please refer:
 			fmt.Printf("block not found: %v\n", err)
 			return
 		}
-		js, err := json.MarshalIndent(block, "", indent)
+		js, _ := json.MarshalIndent(block, "", indent)
 		fmt.Printf("Block: \n%s\n", js)
 	},
 }
@@ -658,7 +658,7 @@ func init() {
 	// add common command
 	rootCmd.AddCommand(completionCmd)
 	// add node command
-	rootCmd.AddCommand(getGroupIDCmd, getBlockNumberCmd, getPbftViewCmd, getSealerListCmd)
+	rootCmd.AddCommand(getGroupIDCmd, getBlockNumberCmd, getPBFTViewCmd, getSealerListCmd)
 	rootCmd.AddCommand(getObserverListCmd, getConsensusStatusCmd, getSyncStatusCmd, getPeersCmd, getGroupPeersCmd)
 	rootCmd.AddCommand(getNodeIDListCmd, getGroupListCmd, getNodeInfoCmd, getGroupInfoCmd, getGroupInfoListCmd)
 	// add block access command
@@ -671,33 +671,33 @@ func init() {
 
 	// cobra.OnInitialize(initConfig)
 
-	// FIXME: add a custom help command or find a way to make help command work without network
-
 	// Here you will define your flags and configuration settings.
 	// Cobra supports persistent flags, which, if defined here,
 	// will be global for your application.
 
-	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is the project directory ./config.ini)")
-
-	// Cobra also supports local flags, which will only run
-	// when this action is called directly.
-	// rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+	// rootCmd.PersistentFlags().StringVarP(&cfgFile, "config", "c", "", "config file (default is the project directory ./config.ini)")
+	rootCmd.Flags().StringVarP(&cfgFile, "privateKeyPath", "p", "", "private key file path of pem format")
+	rootCmd.Flags().BoolVarP(&smCrypto, "smCrypto", "s", false, "use smCrypto or not, default is false")
+	rootCmd.Flags().BoolVarP(&disableSsl, "disableSsl", "d", false, "switch off ssl or not, default use ssl")
+	rootCmd.PersistentFlags().StringVarP(&groupID, "groupID", "g", "group0", "groupID of FISCO BCOS chain")
+	rootCmd.PersistentFlags().StringVarP(&nodeEndpoint, "nodeEndpoint", "n", "127.0.0.1:20200", "node endpoint, default is 127.0.0.1:20200")
+	rootCmd.PersistentFlags().StringVarP(&certPath, "certPath", "c", "./conf", "cert path, default is ./conf, should contain ca.crt, sdk.crt, sdk.key")
 }
 
 func isValidHex(str string) (bool, error) {
 	// starts with "0x"
 	if strings.HasPrefix(str, "0x") {
 		if len(str) == 2 {
-			return false, fmt.Errorf("not a valid hex string: arguments error: please check your inpunt: %s%s", str, info)
+			return false, fmt.Errorf("not a valid hex string: arguments error: please check your input: %s%s", str, info)
 		}
 		// is hex string
 		_, err := hexutil.Decode(str)
 		if err != nil {
-			return false, fmt.Errorf("not a valid hex string: arguments error: please check your inpunt: %s%s: %v", str, info, err)
+			return false, fmt.Errorf("not a valid hex string: arguments error: please check your input: %s%s: %v", str, info, err)
 		}
 		return true, nil
 	}
-	return false, fmt.Errorf("arguments error: Not a valid hex string, please check your inpunt: %s%s", str, info)
+	return false, fmt.Errorf("arguments error: Not a valid hex string, please check your input: %s%s", str, info)
 }
 
 func isBlockNumberOutOfRange(blockNumber int64) (bool, error) {
diff --git a/v3/cmd/commandline/kvTable.go b/v3/cmd/commandline/kvTable.go
index cd67b66f..24190cdb 100644
--- a/v3/cmd/commandline/kvTable.go
+++ b/v3/cmd/commandline/kvTable.go
@@ -9,7 +9,7 @@ import (
 
 var createTable = &cobra.Command{
 	Use:   "createTable",
-	Short: "[tableName] [keyName] [valueName]  create table",
+	Short: "<tableName> <keyName> <valueName>",
 	Long: `createTable.
 Arguments:
           [tableName]: string
@@ -18,11 +18,7 @@ Arguments:
 
 For example:
 
-    [createTable] [table1] [key1] [value1]
-
-For more information please refer:
-
-    https://fisco-bcos-documentation.readthedocs.io/zh_CN/latest/docs/manual/console.html#addobserver`,
+    createTable table1 key1 value1`,
 	Args: cobra.ExactArgs(3),
 	Run: func(cmd *cobra.Command, args []string) {
 		tableName := args[0]
@@ -60,11 +56,7 @@ Arguments:
 
 For example:
 
-    [set] [table1] [key1] [value1]
-
-For more information please refer:
-
-    https://fisco-bcos-documentation.readthedocs.io/zh_CN/latest/docs/manual/console.html#addsealer`,
+    set table1 key1 value1`,
 	Args: cobra.ExactArgs(3),
 	Run: func(cmd *cobra.Command, args []string) {
 		tableName := args[0]
@@ -104,11 +96,7 @@ Arguments:
 
 For example:
 
-    [get] [tableName] [key1]
-
-For more information please refer:
-
-    https://fisco-bcos-documentation.readthedocs.io/zh_CN/latest/docs/manual/console.html#removenode`,
+    [get] [tableName] [key1]`,
 	Args: cobra.ExactArgs(2),
 	Run: func(cmd *cobra.Command, args []string) {
 		tableName := args[0]
diff --git a/v3/cmd/commandline/root.go b/v3/cmd/commandline/root.go
index 09e927b3..82d15b35 100644
--- a/v3/cmd/commandline/root.go
+++ b/v3/cmd/commandline/root.go
@@ -5,25 +5,24 @@ import (
 	"encoding/hex"
 	"fmt"
 	"os"
+	"strconv"
+	"strings"
 
 	"github.com/FISCO-BCOS/go-sdk/v3/client"
 	"github.com/spf13/cobra"
 )
 
 var cfgFile string
+var privateKeyFilePath string
+var smCrypto bool
+var disableSsl bool
+var nodeEndpoint string
+var groupID string
+var certPath string
 
 // RPC is the client connected to the blockchain
 var RPC *client.Client
 
-// GroupID default
-var GroupID uint
-
-// ChainID default
-var ChainID int64
-
-// URL default
-var URL string
-
 // GetClient is used for test, it will be init by a config file later.
 func getClient(config *client.Config) *client.Client {
 	// RPC API
@@ -39,7 +38,7 @@ func getClient(config *client.Config) *client.Client {
 var rootCmd = &cobra.Command{
 	Use:     "console",
 	Short:   "console is a command line tool for FISCO BCOS 3.0.0",
-	Version: "0.10.0",
+	Version: "3.0.0",
 	Long: `console is a Golang client for FISCO BCOS 3.0.0 and it supports the JSON-RPC
 service and the contract operations(e.g. deploying && writing contracts).
 
@@ -71,8 +70,32 @@ func Execute() {
 
 // initConfig reads in config file and ENV variables if set.
 func initConfig() {
-	privateKey, _ := hex.DecodeString("145e247e170ba3afd6ae97e88f00dbc976c2345d511b0f6713355d19d8b80b58")
-	config := &client.Config{IsSMCrypto: false, GroupID: "group0",
-		PrivateKey: privateKey, Host: "127.0.0.1", Port: 20200, TLSCaFile: "./ca.crt", TLSKeyFile: "./sdk.key", TLSCertFile: "./sdk.crt"}
+	var privateKey []byte
+	if len(privateKeyFilePath) != 0 {
+		_, err := os.Stat(privateKeyFilePath)
+		if err != nil && os.IsNotExist(err) {
+			fmt.Println("private key file set but not exist, use default private key")
+		}
+		key, curve, err := client.LoadECPrivateKeyFromPEM(privateKeyFilePath)
+		if err != nil {
+			fmt.Printf("parse private key failed, err: %v\n", err)
+			return
+		}
+		if smCrypto && curve != client.Sm2p256v1 {
+			fmt.Printf("smCrypto should use sm2p256v1 private key, but found %s\n", curve)
+			return
+		}
+		if !smCrypto && curve != client.Secp256k1 {
+			fmt.Printf("should use secp256k1 private key, but found %s\n", curve)
+		}
+		privateKey = key
+	} else {
+		privateKey, _ = hex.DecodeString("145e247e170ba3afd6ae97e88f00dbc976c2345d511b0f6713355d19d8b80b58")
+	}
+	ret := strings.Split(nodeEndpoint, ":")
+	host := ret[0]
+	port, _ := strconv.Atoi(ret[1])
+	config := &client.Config{IsSMCrypto: smCrypto, GroupID: groupID, DisableSsl: disableSsl,
+		PrivateKey: privateKey, Host: host, Port: port, TLSCaFile: certPath + "/ca.crt", TLSKeyFile: certPath + "/sdk.key", TLSCertFile: certPath + "/sdk.crt"}
 	RPC = getClient(config)
 }
diff --git a/v3/cmd/commandline/system_config.go b/v3/cmd/commandline/system_config.go
index 312c678c..4e8ab391 100644
--- a/v3/cmd/commandline/system_config.go
+++ b/v3/cmd/commandline/system_config.go
@@ -17,11 +17,7 @@ Arguments:
 
 For example:
 
-    [setSystemConfigByKey] [tx_count_limit] 10000
-
-For more information please refer:
-
-    https://fisco-bcos-documentation.readthedocs.io/zh_CN/latest/docs/api.html#`,
+    [setSystemConfigByKey] [tx_count_limit] 10000`,
 	Args: cobra.ExactArgs(2),
 	Run: func(cmd *cobra.Command, args []string) {
 		//configMap := make(map[string]struct{})
diff --git a/v3/examples/KVTableTest.go b/v3/examples/KVTableTest.go
index 2b7d8cfa..c201da6c 100644
--- a/v3/examples/KVTableTest.go
+++ b/v3/examples/KVTableTest.go
@@ -271,11 +271,11 @@ type KVTableTestInsertResult struct {
 // WatchInsertResult is a free log subscription operation binding the contract event 0xc57b01fa77f41df77eaab79a0e2623fab2e7ae3e9530d9b1cab225ad65f2b7ce.
 //
 // Solidity: event InsertResult(int256 count)
-func (_KVTableTest *KVTableTestFilterer) WatchInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestFilterer) WatchInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.contract.WatchLogs(fromBlock, handler, "InsertResult")
 }
 
-func (_KVTableTest *KVTableTestFilterer) WatchAllInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestFilterer) WatchAllInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.contract.WatchLogs(fromBlock, handler, "InsertResult")
 }
 
@@ -293,11 +293,11 @@ func (_KVTableTest *KVTableTestFilterer) ParseInsertResult(log types.Log) (*KVTa
 // WatchInsertResult is a free log subscription operation binding the contract event 0xc57b01fa77f41df77eaab79a0e2623fab2e7ae3e9530d9b1cab225ad65f2b7ce.
 //
 // Solidity: event InsertResult(int256 count)
-func (_KVTableTest *KVTableTestSession) WatchInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestSession) WatchInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.Contract.WatchInsertResult(fromBlock, handler)
 }
 
-func (_KVTableTest *KVTableTestSession) WatchAllInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestSession) WatchAllInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.Contract.WatchAllInsertResult(fromBlock, handler)
 }
 
diff --git a/v3/examples/hello_world/manual/main.go b/v3/examples/hello_world/manual/main.go
index 5d5aeba3..5f6fae07 100644
--- a/v3/examples/hello_world/manual/main.go
+++ b/v3/examples/hello_world/manual/main.go
@@ -75,8 +75,12 @@ func main() {
 	address := common.HexToAddress(receipt.ContractAddress)
 	// SubscribeEventLogs
 	hello := bind.NewBoundContract(address, parsed, client, client, client)
-	fromBlock := uint64(0)
-	hello.WatchLogs(&fromBlock, func(ret int, logs []types.Log) {
+	currentBlock, err := client.GetBlockNumber(context.Background())
+	if err != nil {
+		fmt.Printf("GetBlockNumber() failed: %v", err)
+		return
+	}
+	hello.WatchLogs(&currentBlock, func(ret int, logs []types.Log) {
 		setValue := &struct {
 			V     string
 			From  common.Address
diff --git a/v3/examples/hello_world/wrapper/HelloWorld.go b/v3/examples/hello_world/wrapper/HelloWorld.go
index f82b9118..8f854f3a 100644
--- a/v3/examples/hello_world/wrapper/HelloWorld.go
+++ b/v3/examples/hello_world/wrapper/HelloWorld.go
@@ -82,7 +82,7 @@ type HelloWorldFilterer struct {
 // HelloWorldSession is an auto generated Go binding around a Solidity contract,
 // with pre-set call and transact options.
 type HelloWorldSession struct {
-	Contract     *HelloWorld             // Generic contract binding to set the session for
+	Contract     *HelloWorld       // Generic contract binding to set the session for
 	CallOpts     bind.CallOpts     // Call options to use throughout this session
 	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
 }
@@ -90,15 +90,15 @@ type HelloWorldSession struct {
 // HelloWorldCallerSession is an auto generated read-only Go binding around a Solidity contract,
 // with pre-set call options.
 type HelloWorldCallerSession struct {
-	Contract *HelloWorldCaller   // Generic contract caller binding to set the session for
-	CallOpts bind.CallOpts // Call options to use throughout this session
+	Contract *HelloWorldCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts     // Call options to use throughout this session
 }
 
 // HelloWorldTransactorSession is an auto generated write-only Go binding around a Solidity contract,
 // with pre-set transact options.
 type HelloWorldTransactorSession struct {
-	Contract     *HelloWorldTransactor   // Generic contract transactor binding to set the session for
-	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+	Contract     *HelloWorldTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts     // Transaction auth options to use throughout this session
 }
 
 // HelloWorldRaw is an auto generated low-level Go binding around a Solidity contract.
@@ -301,11 +301,11 @@ type HelloWorldSetValue struct {
 // WatchSetValue is a free log subscription operation binding the contract event 0xc3bf5911f8e0476e774566ef3fa1259f04156ba5c61ea5ff35c0201390381f96.
 //
 // Solidity: event setValue(string v, address indexed from, address indexed to, int256 value)
-func (_HelloWorld *HelloWorldFilterer) WatchSetValue(fromBlock *uint64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
+func (_HelloWorld *HelloWorldFilterer) WatchSetValue(fromBlock *int64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
 	return _HelloWorld.contract.WatchLogs(fromBlock, handler, "setValue", from, to)
 }
 
-func (_HelloWorld *HelloWorldFilterer) WatchAllSetValue(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_HelloWorld *HelloWorldFilterer) WatchAllSetValue(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _HelloWorld.contract.WatchLogs(fromBlock, handler, "setValue")
 }
 
@@ -323,11 +323,11 @@ func (_HelloWorld *HelloWorldFilterer) ParseSetValue(log types.Log) (*HelloWorld
 // WatchSetValue is a free log subscription operation binding the contract event 0xc3bf5911f8e0476e774566ef3fa1259f04156ba5c61ea5ff35c0201390381f96.
 //
 // Solidity: event setValue(string v, address indexed from, address indexed to, int256 value)
-func (_HelloWorld *HelloWorldSession) WatchSetValue(fromBlock *uint64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
+func (_HelloWorld *HelloWorldSession) WatchSetValue(fromBlock *int64, handler func(int, []types.Log), from common.Address, to common.Address) (string, error) {
 	return _HelloWorld.Contract.WatchSetValue(fromBlock, handler, from, to)
 }
 
-func (_HelloWorld *HelloWorldSession) WatchAllSetValue(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_HelloWorld *HelloWorldSession) WatchAllSetValue(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _HelloWorld.Contract.WatchAllSetValue(fromBlock, handler)
 }
 
diff --git a/v3/examples/hello_world/wrapper/main.go b/v3/examples/hello_world/wrapper/main.go
index 015fd169..f45d1835 100644
--- a/v3/examples/hello_world/wrapper/main.go
+++ b/v3/examples/hello_world/wrapper/main.go
@@ -51,7 +51,12 @@ func main() {
 		return
 	}
 	done := make(chan bool)
-	_, err = helloSession.WatchAllSetValue(nil, func(ret int, logs []types.Log) {
+	currentBlock, err := client.GetBlockNumber(context.Background())
+	if err != nil {
+		fmt.Printf("GetBlockNumber() failed: %v", err)
+		return
+	}
+	_, err = helloSession.WatchAllSetValue(&currentBlock, func(ret int, logs []types.Log) {
 		fmt.Printf("receive event SetValue: %d, logs: %v\n", ret, logs)
 		setValue, err := helloSession.ParseSetValue(logs[0])
 		if err != nil {
diff --git a/v3/precompiled/auth/CommitteeManager.go b/v3/precompiled/auth/CommitteeManager.go
index cd038564..60f25ec0 100644
--- a/v3/precompiled/auth/CommitteeManager.go
+++ b/v3/precompiled/auth/CommitteeManager.go
@@ -726,11 +726,11 @@ type CommitteeManagerExecResult struct {
 // WatchExecResult is a free log subscription operation binding the contract event 0x7251e13f6f51fdfe60094817f80310366d2e1148fe8a46cb475b582d35bfdea8.
 //
 // Solidity: event execResult(int256 )
-func (_CommitteeManager *CommitteeManagerFilterer) WatchExecResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_CommitteeManager *CommitteeManagerFilterer) WatchExecResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _CommitteeManager.contract.WatchLogs(fromBlock, handler, "execResult")
 }
 
-func (_CommitteeManager *CommitteeManagerFilterer) WatchAllExecResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_CommitteeManager *CommitteeManagerFilterer) WatchAllExecResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _CommitteeManager.contract.WatchLogs(fromBlock, handler, "execResult")
 }
 
@@ -748,11 +748,11 @@ func (_CommitteeManager *CommitteeManagerFilterer) ParseExecResult(log types.Log
 // WatchExecResult is a free log subscription operation binding the contract event 0x7251e13f6f51fdfe60094817f80310366d2e1148fe8a46cb475b582d35bfdea8.
 //
 // Solidity: event execResult(int256 )
-func (_CommitteeManager *CommitteeManagerSession) WatchExecResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_CommitteeManager *CommitteeManagerSession) WatchExecResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _CommitteeManager.Contract.WatchExecResult(fromBlock, handler)
 }
 
-func (_CommitteeManager *CommitteeManagerSession) WatchAllExecResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_CommitteeManager *CommitteeManagerSession) WatchAllExecResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _CommitteeManager.Contract.WatchAllExecResult(fromBlock, handler)
 }
 
diff --git a/v3/test/performanceTest/contract/kvTableTest/KVTableTest.go b/v3/test/performanceTest/contract/kvTableTest/KVTableTest.go
index ef37d54d..2e5ce12d 100644
--- a/v3/test/performanceTest/contract/kvTableTest/KVTableTest.go
+++ b/v3/test/performanceTest/contract/kvTableTest/KVTableTest.go
@@ -271,11 +271,11 @@ type KVTableTestInsertResult struct {
 // WatchInsertResult is a free log subscription operation binding the contract event 0xc57b01fa77f41df77eaab79a0e2623fab2e7ae3e9530d9b1cab225ad65f2b7ce.
 //
 // Solidity: event InsertResult(int256 count)
-func (_KVTableTest *KVTableTestFilterer) WatchInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestFilterer) WatchInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.contract.WatchLogs(fromBlock, handler, "InsertResult")
 }
 
-func (_KVTableTest *KVTableTestFilterer) WatchAllInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestFilterer) WatchAllInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.contract.WatchLogs(fromBlock, handler, "InsertResult")
 }
 
@@ -293,11 +293,11 @@ func (_KVTableTest *KVTableTestFilterer) ParseInsertResult(log types.Log) (*KVTa
 // WatchInsertResult is a free log subscription operation binding the contract event 0xc57b01fa77f41df77eaab79a0e2623fab2e7ae3e9530d9b1cab225ad65f2b7ce.
 //
 // Solidity: event InsertResult(int256 count)
-func (_KVTableTest *KVTableTestSession) WatchInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestSession) WatchInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.Contract.WatchInsertResult(fromBlock, handler)
 }
 
-func (_KVTableTest *KVTableTestSession) WatchAllInsertResult(fromBlock *uint64, handler func(int, []types.Log)) (string, error) {
+func (_KVTableTest *KVTableTestSession) WatchAllInsertResult(fromBlock *int64, handler func(int, []types.Log)) (string, error) {
 	return _KVTableTest.Contract.WatchAllInsertResult(fromBlock, handler)
 }