diff --git a/core/client/init_node.go b/core/client/init_node.go
index f7a2ad901..444b33834 100644
--- a/core/client/init_node.go
+++ b/core/client/init_node.go
@@ -18,14 +18,10 @@ import (
 )
 
 var (
-	logging    logger.Logger
+	logging    = logger.GetLogger()
 	nodeClient *Node
 )
 
-func init() {
-	logging.Init(logger.DEBUG, "0chain-core")
-}
-
 // Node Maintains central states of SDK (client's context, network).
 // Initialized through [Init] function.
 // Use client.GetNode() to get its instance after Init is called.
diff --git a/core/logger/logger.go b/core/logger/logger.go
index fbe517017..4af6e8692 100644
--- a/core/logger/logger.go
+++ b/core/logger/logger.go
@@ -3,6 +3,8 @@ package logger
 
 import (
 	"fmt"
+	"github.com/0chain/gosdk/core/version"
+	"gopkg.in/natefinch/lumberjack.v2"
 	"io"
 	"log"
 	"os"
@@ -142,3 +144,39 @@ func (l *Logger) Close() {
 		}
 	}
 }
+
+// Initialize common logger
+var logging Logger
+
+func GetLogger() *Logger {
+	return &logging
+}
+
+func CloseLog() {
+	logging.Close()
+}
+
+func init() {
+	logging.Init(DEBUG, "0chain-core-sdk")
+}
+
+// SetLogLevel set the log level.
+// lvl - 0 disabled; higher number (upto 4) more verbosity
+func SetLogLevel(lvl int) {
+	logging.SetLevel(lvl)
+}
+
+// SetLogFile - sets file path to write log
+// verbose - true - console output; false - no console output
+func SetLogFile(logFile string, verbose bool) {
+	ioWriter := &lumberjack.Logger{
+		Filename:   logFile,
+		MaxSize:    100, // MB
+		MaxBackups: 5,   // number of backups
+		MaxAge:     28,  //days
+		LocalTime:  false,
+		Compress:   false, // disabled by default
+	}
+	logging.SetLogFile(ioWriter, verbose)
+	logging.Info("******* Wallet SDK Version:", version.VERSIONSTR, " ******* (SetLogFile)")
+}
diff --git a/core/transaction/entity.go b/core/transaction/entity.go
index eee839b5a..995a45954 100644
--- a/core/transaction/entity.go
+++ b/core/transaction/entity.go
@@ -23,7 +23,7 @@ import (
 	lru "github.com/hashicorp/golang-lru"
 )
 
-var Logger logger.Logger
+var Logger = logger.GetLogger()
 
 const STORAGE_SCADDRESS = "6dba10422e368813802877a85039d3985d96760ed844092319743fb3a76712d7"
 const MINERSC_SCADDRESS = "6dba10422e368813802877a85039d3985d96760ed844092319743fb3a76712d9"
@@ -270,7 +270,7 @@ func (t *Transaction) VerifySigWith(pubkey string, verifyHandler VerifyFunc) (bo
 }
 
 func SendTransactionSync(txn *Transaction, miners []string) error {
-	const requestTimeout = 30 * time.Second // Timeout for each request
+	const requestTimeout = 3 * time.Second // Timeout for each request
 
 	fails := make(chan error, len(miners))
 	var wg sync.WaitGroup
diff --git a/zboxcore/logger/logger.go b/zboxcore/logger/logger.go
index 37a89ee44..64134eb35 100644
--- a/zboxcore/logger/logger.go
+++ b/zboxcore/logger/logger.go
@@ -3,11 +3,5 @@ package logger
 
 import "github.com/0chain/gosdk/core/logger"
 
-var defaultLogLevel = logger.DEBUG
-
 // Logger global logger instance
-var Logger logger.Logger
-
-func init() {
-	Logger.Init(defaultLogLevel, "0box-sdk")
-}
+var Logger = logger.GetLogger()
diff --git a/zboxcore/sdk/sdk.go b/zboxcore/sdk/sdk.go
index 260cd57cc..adb6eddbe 100644
--- a/zboxcore/sdk/sdk.go
+++ b/zboxcore/sdk/sdk.go
@@ -97,7 +97,7 @@ func SetLogFile(logFile string, verbose bool) {
 
 // GetLogger retrieves logger instance
 func GetLogger() *logger.Logger {
-	return &l.Logger
+	return l.Logger
 }
 
 type BackPool struct {
diff --git a/zcncore/wallet_base.go b/zcncore/wallet_base.go
index f4ead5968..89111ee59 100644
--- a/zcncore/wallet_base.go
+++ b/zcncore/wallet_base.go
@@ -79,11 +79,11 @@ const (
 )
 
 var defaultLogLevel = logger.DEBUG
-var logging logger.Logger
+var logging = logger.GetLogger()
 
 // GetLogger returns the logger instance
 func GetLogger() *logger.Logger {
-	return &logging
+	return logging
 }
 
 // CloseLog closes log file
@@ -141,10 +141,6 @@ type AuthCallback interface {
 	OnSetupComplete(status int, err string)
 }
 
-func init() {
-	logging.Init(defaultLogLevel, "0chain-core-sdk")
-}
-
 func checkSdkInit() error {
 	_, err := client.GetNode()
 	if err != nil {