diff --git a/build.gradle b/build.gradle
index edee227..5e107ef 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,17 @@
 plugins {
+    id 'java'
     id 'java-library'
+    id 'maven-publish'
+    id 'signing'
 }
-
-group 'com.bdware.sc'
-version '1.0-SNAPSHOT'
-
+group 'org.bdware.bdcontract'
+version '1.0.0'
 sourceCompatibility = 1.8
 
+
 repositories {
+    mavenLocal()
+    maven { url 'https://maven.aliyun.com/repository/public' }
     mavenCentral()
 }
 
@@ -31,11 +35,11 @@ sourceSets {
 }
 
 dependencies {
-    api project(":gmhelper")
+    api 'com.google.code.gson:gson:2.8.8'
+    api 'org.bdware.bdcontract:gmhelper:0.1.0'
     api 'javax.websocket:javax.websocket-api:1.1'
-    api 'log4j:log4j:1.2.17'
-    api 'org.apache.logging.log4j:log4j-core:2.14.1'
-    api 'org.apache.logging.log4j:log4j-api:2.14.1'
+    api 'org.apache.logging.log4j:log4j-core:2.17.2'
+    api 'org.apache.logging.log4j:log4j-api:2.17.2'
     api 'org.glassfish.tyrus.bundles:tyrus-standalone-client:1.17'
     testImplementation 'junit:junit:4.13.2'
 }
@@ -69,4 +73,84 @@ task release(type: Zip, dependsOn: ["copyJar", "copyLibs"]) {
     duplicatesStrategy = DuplicatesStrategy.INCLUDE
     archiveFileName = "java-client-${projectIds.version}.zip"
     destinationDirectory = file('build/')
+}
+
+task classJar(type: Jar, dependsOn: classes) {
+    classifier = "jar"
+}
+task sourceJar(type: Jar, dependsOn: classes) {
+    archiveClassifier = "sources"
+    classifier = "sources"
+    from sourceSets.main.allSource
+}
+
+tasks.withType(Javadoc) {
+    options.addStringOption('Xdoclint:none', '-quiet')
+}
+
+task javadocJar(type: Jar, dependsOn: javadoc) {
+    archiveClassifier = 'javadoc'
+    classifier = "javadoc"
+    exclude {
+        details -> details.file.getAbsolutePath().contains("/gm/")
+    }
+    from javadoc.destinationDir
+}
+
+publishing {
+    publications {
+        mavenJava(MavenPublication) {
+            groupId project.group
+            artifactId "sdk-java"
+            version "${version}"
+            from components.java
+            artifact sourceJar
+            artifact javadocJar
+            artifact classJar
+            pom {
+                name = "bdware-sdk-java"
+                description = "sdk-java"
+                url = "https://gitee.com/BDWare/sdk-java"
+                licenses {
+                    license {
+                        name = "Mulan PSL v2"
+                        url = "http://license.coscl.org.cn/MulanPSL2"
+                    }
+                }
+                developers {
+                    developer {
+                        id = "dataware"
+                        email = "caihq@pku.edu.cn"
+                    }
+                }
+                scm {
+                    connection = "scm:git:https://gitee.com/BDWare/sdk-java.git"
+                    developerConnection = "scm:git:https://gitee.com/BDWare/sdk-java.git"
+                    url = "https://gitee.com/BDWare/sdk-java"
+                }
+            }
+
+        }
+    }
+    repositories {
+        maven {
+            name 'bdwareSnapshotRepository'
+            url 'https://oss.sonatype.org/content/repositories/snapshots'
+            credentials {
+                username = "${NEXUS_USERNAME}"
+                password = "${NEXUS_PASSWORD}"
+            }
+        }
+        maven {
+            name 'bdwareRepository'
+            url 'https://oss.sonatype.org/service/local/staging/deploy/maven2'
+            credentials {
+                username = "${NEXUS_USERNAME}"
+                password = "${NEXUS_PASSWORD}"
+            }
+        }
+    }
+}
+signing {
+    sign publishing.publications.mavenJava
 }
\ No newline at end of file
diff --git a/src/main/java/org/bdware/client/Main.java b/src/main/java/org/bdware/client/Main.java
index 7f88e7c..5f79490 100644
--- a/src/main/java/org/bdware/client/Main.java
+++ b/src/main/java/org/bdware/client/Main.java
@@ -4,7 +4,6 @@ import com.google.gson.JsonObject;
 import org.bdware.client.ws.Action;
 import org.zz.gmhelper.SM2KeyPair;
 import org.zz.gmhelper.SM2Util;
-
 public class Main {
     public static void main(String[] args) throws InterruptedException {
         if (args.length == 0 || args[0].equals("-h") || args[0].equals("--help")) {
diff --git a/src/main/sdk/org/bdware/client/SmartContractHandler.java b/src/main/sdk/org/bdware/client/SmartContractHandler.java
index 601e3b8..a3107dd 100644
--- a/src/main/sdk/org/bdware/client/SmartContractHandler.java
+++ b/src/main/sdk/org/bdware/client/SmartContractHandler.java
@@ -93,7 +93,7 @@ public abstract class SmartContractHandler implements Handler {
     @Override
     public void handle(JsonObject obj) {
         try {
-//            LOGGER.info("receive:" + obj);
+            LOGGER.info("receive:" + obj);
             if (!obj.has("action")) {
                 LOGGER.warn("can't handle message without action: " + obj);
             }
@@ -104,10 +104,12 @@ public abstract class SmartContractHandler implements Handler {
             } else {
                 LOGGER.warn("can't handle action: " + methodName + " -> " + obj);
             }
-        } catch (SecurityException e) {
+        } catch (Exception e) {
             onUndefined(obj);
         } catch (Throwable t) {
             t.printStackTrace();
         }
     }
+
+
 }