diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 9817bda8b..cece5dc3c 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -5,6 +5,7 @@ on:
     types: [ published, created, edited ]
 env:
   CCACHE_DIR: ${{ github.workspace }}/ccache
+  ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true
 
 jobs:
   build:
@@ -86,7 +87,14 @@ jobs:
           distribution: 'zulu'
           java-version: '8.0.345'
       - name: install CentOS dependencies
-        run: yum install -y epel-release centos-release-scl wget which git openssl-devel openssl tree
+        run: |
+          sed -i s/mirror.centos.org/mirrors.aliyun.com/g /etc/yum.repos.d/*.repo
+          sed -i s/^#.*baseurl=http/baseurl=http/g /etc/yum.repos.d/*.repo
+          sed -i s/^mirrorlist=http/#mirrorlist=http/g /etc/yum.repos.d/*.repo
+          yum clean all
+          yum makecache
+          yum update -y
+          yum install -y epel-release centos-release-scl wget which git openssl-devel openssl tree
       - name: Set up JDK 1.8.0.345
         uses: actions/setup-java@v3
         with:
diff --git a/build.gradle b/build.gradle
index fcdd0bf78..14fca8703 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,7 +20,7 @@ ext {
     commonsIOVersion = '2.11.0'
     commonsLang3Version = '3.12.0'
     toml4jVersion = "0.7.2"
-    bcprovJDK18onVersion = '1.75'
+    bcprovJDK18onVersion = '1.78'
     webankJavaCryptoVersion = "1.0.3"
     junitVersion = '4.13.2'
     commonsCollections4Version = "4.4"
diff --git a/src/main/java/org/fisco/bcos/sdk/v3/codec/ContractCodec.java b/src/main/java/org/fisco/bcos/sdk/v3/codec/ContractCodec.java
index 03073a956..3e21e854c 100644
--- a/src/main/java/org/fisco/bcos/sdk/v3/codec/ContractCodec.java
+++ b/src/main/java/org/fisco/bcos/sdk/v3/codec/ContractCodec.java
@@ -1017,7 +1017,7 @@ public List<Object> decodeEvent(String abi, String eventName, EventLog log)
                     params =
                             ContractCodecTools.decodeJavaObject(inputObject, log.getData(), isWasm);
                 }
-                List<String> topics = log.getTopics();
+                List<String> topics = decodeIndexedEvent(log, abiDefinition);
                 return this.mergeEventParamsAndTopics(abiDefinition, params, topics);
             } catch (Exception e) {
                 logger.error(" exception in decodeEventToObject : {}", e.getMessage());
@@ -1029,6 +1029,30 @@ public List<Object> decodeEvent(String abi, String eventName, EventLog log)
         throw new ContractCodecException(errorMsg);
     }
 
+    public List<String> decodeIndexedEvent(EventLog log, ABIDefinition abiDefinition)
+            throws ClassNotFoundException {
+        List<ABIObject> eventIndexedObject =
+                ABIObjectFactory.createEventIndexedObject(abiDefinition);
+        List<String> topics = new ArrayList<>();
+        if (!log.getTopics().isEmpty()) {
+            topics.add(log.getTopics().get(0));
+            for (int i = 1; i < log.getTopics().size(); i++) {
+                ABIObject indexedObject = eventIndexedObject.get(i - 1);
+                if (indexedObject.isDynamic()) {
+                    topics.add(log.getTopics().get(i));
+                } else {
+                    List<String> objects =
+                            contractCodecJsonWrapper.decode(
+                                    indexedObject, Hex.decode(log.getTopics().get(i)), isWasm);
+                    if (!objects.isEmpty()) {
+                        topics.add(objects.get(0));
+                    }
+                }
+            }
+        }
+        return topics;
+    }
+
     public List<Object> decodeEventByTopic(String abi, String eventTopic, EventLog log)
             throws ContractCodecException {
         ContractABIDefinition contractABIDefinition = this.abiDefinitionFactory.loadABI(abi);
@@ -1040,7 +1064,7 @@ public List<Object> decodeEventByTopic(String abi, String eventTopic, EventLog l
             if (!log.getData().equals("0x")) {
                 params = ContractCodecTools.decodeJavaObject(inputObject, log.getData(), isWasm);
             }
-            List<String> topics = log.getTopics();
+            List<String> topics = decodeIndexedEvent(log, abiDefinition);
             return this.mergeEventParamsAndTopics(abiDefinition, params, topics);
         } catch (Exception e) {
             logger.error(" exception in decodeEventByTopicToObject : {}", e.getMessage());
@@ -1078,7 +1102,7 @@ public List<String> decodeEventToString(String abi, String eventName, EventLog l
                             contractCodecJsonWrapper.decode(
                                     inputObject, Hex.decode(log.getData()), isWasm);
                 }
-                List<String> topics = log.getTopics();
+                List<String> topics = decodeIndexedEvent(log, abiDefinition);
                 return this.mergeEventParamsAndTopicsToString(abiDefinition, params, topics);
             } catch (Exception e) {
                 logger.error(" exception in decodeEventToString : {}", e.getMessage());
@@ -1103,7 +1127,7 @@ public List<String> decodeEventByTopicToString(String abi, String eventTopic, Ev
                         contractCodecJsonWrapper.decode(
                                 inputObject, Hex.decode(log.getData()), isWasm);
             }
-            List<String> topics = log.getTopics();
+            List<String> topics = decodeIndexedEvent(log, abiDefinition);
             return this.mergeEventParamsAndTopicsToString(abiDefinition, params, topics);
         } catch (Exception e) {
             logger.error(" exception in decodeEventByTopicToString : {}", e.getMessage());
diff --git a/src/main/java/org/fisco/bcos/sdk/v3/codec/abi/TypeDecoder.java b/src/main/java/org/fisco/bcos/sdk/v3/codec/abi/TypeDecoder.java
index d393e83ae..8f731b19d 100644
--- a/src/main/java/org/fisco/bcos/sdk/v3/codec/abi/TypeDecoder.java
+++ b/src/main/java/org/fisco/bcos/sdk/v3/codec/abi/TypeDecoder.java
@@ -85,7 +85,8 @@ public static <T extends NumericType> T decodeNumeric(byte[] inputByteArray, Cla
             byte[] resultByteArray = new byte[typeLengthAsBytes + 1];
 
             if (Int.class.isAssignableFrom(type) || Fixed.class.isAssignableFrom(type)) {
-                resultByteArray[0] = inputByteArray[0]; // take MSB as sign bit
+                // NOTE (first byte & 0xffff) >> 7 means take the MSB as sign bit
+                resultByteArray[0] = (byte) ((inputByteArray[0] & 0xffff) >> 7);
             }
 
             int valueOffset = Type.MAX_BYTE_LENGTH - typeLengthAsBytes;
diff --git a/src/main/java/org/fisco/bcos/sdk/v3/codec/datatypes/Event.java b/src/main/java/org/fisco/bcos/sdk/v3/codec/datatypes/Event.java
index ba6e5b15a..ffe045343 100644
--- a/src/main/java/org/fisco/bcos/sdk/v3/codec/datatypes/Event.java
+++ b/src/main/java/org/fisco/bcos/sdk/v3/codec/datatypes/Event.java
@@ -2,7 +2,9 @@
 
 import java.util.List;
 import java.util.stream.Collectors;
+import org.fisco.bcos.sdk.v3.codec.EventEncoder;
 import org.fisco.bcos.sdk.v3.codec.Utils;
+import org.fisco.bcos.sdk.v3.crypto.hash.Hash;
 
 /** Event wrapper type. */
 public class Event {
@@ -29,4 +31,9 @@ public List<TypeReference<Type>> getIndexedParameters() {
     public List<TypeReference<Type>> getNonIndexedParameters() {
         return parameters.stream().filter(p -> !p.isIndexed()).collect(Collectors.toList());
     }
+
+    public String encodeToTopic(Hash hashImpl) {
+        EventEncoder encoder = new EventEncoder(hashImpl);
+        return encoder.encode(this);
+    }
 }
diff --git a/src/main/java/org/fisco/bcos/sdk/v3/codec/wrapper/ABIObjectFactory.java b/src/main/java/org/fisco/bcos/sdk/v3/codec/wrapper/ABIObjectFactory.java
index 701f1c308..dd14f0950 100644
--- a/src/main/java/org/fisco/bcos/sdk/v3/codec/wrapper/ABIObjectFactory.java
+++ b/src/main/java/org/fisco/bcos/sdk/v3/codec/wrapper/ABIObjectFactory.java
@@ -1,6 +1,7 @@
 package org.fisco.bcos.sdk.v3.codec.wrapper;
 
 import java.math.BigInteger;
+import java.util.ArrayList;
 import java.util.List;
 import org.fisco.bcos.sdk.v3.utils.Numeric;
 import org.slf4j.Logger;
@@ -37,6 +38,16 @@ private static ABIObject createObject(String name, List<ABIDefinition.NamedType>
         return null;
     }
 
+    public static List<ABIObject> createEventIndexedObject(ABIDefinition abiDefinition) {
+        ArrayList<ABIObject> abiObjects = new ArrayList<>();
+        for (ABIDefinition.NamedType namedType : abiDefinition.getInputs()) {
+            if (namedType.isIndexed()) {
+                abiObjects.add(buildTypeObject(namedType));
+            }
+        }
+        return abiObjects;
+    }
+
     public static ABIObject createEventInputObject(ABIDefinition abiDefinition) {
         return creatEventObjectWithOutIndexed(abiDefinition.getInputs());
     }
diff --git a/src/main/java/org/fisco/bcos/sdk/v3/contract/Contract.java b/src/main/java/org/fisco/bcos/sdk/v3/contract/Contract.java
index 95e1bd8a7..8dc1856d5 100644
--- a/src/main/java/org/fisco/bcos/sdk/v3/contract/Contract.java
+++ b/src/main/java/org/fisco/bcos/sdk/v3/contract/Contract.java
@@ -81,12 +81,12 @@ public class Contract {
     protected TransactionManager transactionManager = null;
     protected final Client client;
     public static final String FUNC_DEPLOY = "deploy";
-    protected final FunctionEncoderInterface functionEncoder;
-    protected final FunctionReturnDecoderInterface functionReturnDecoder;
+    public final FunctionEncoderInterface functionEncoder;
+    public final FunctionReturnDecoderInterface functionReturnDecoder;
     protected final CryptoKeyPair credential;
     protected final CryptoSuite cryptoSuite;
-    protected final EventEncoder eventEncoder;
-    private final EventSubscribe eventSubscribe;
+    public final EventEncoder eventEncoder;
+    public final EventSubscribe eventSubscribe;
     private boolean enableDAG = false;
 
     /**
@@ -735,24 +735,24 @@ protected String createSignedTransaction(Function function) {
         return txPair.getSignedTx();
     }
 
-    public void subscribeEvent(EventSubParams params, EventSubCallback callback) {
-        this.eventSubscribe.subscribeEvent(params, callback);
+    public String subscribeEvent(EventSubParams params, EventSubCallback callback) {
+        return this.eventSubscribe.subscribeEvent(params, callback);
     }
 
-    public void subscribeEvent(String topic0, EventSubCallback callback) {
-        subscribeEvent(topic0, BigInteger.valueOf(-1), BigInteger.valueOf(-1), callback);
+    public String subscribeEvent(String topic0, EventSubCallback callback) {
+        return subscribeEvent(topic0, BigInteger.valueOf(-1), BigInteger.valueOf(-1), callback);
     }
 
-    public void subscribeEvent(
+    public String subscribeEvent(
             String topic0, BigInteger fromBlock, BigInteger toBlock, EventSubCallback callback) {
-        subscribeEvent(
+        return subscribeEvent(
                 fromBlock,
                 toBlock,
                 Collections.singletonList(Collections.singletonList(topic0)),
                 callback);
     }
 
-    public void subscribeEvent(
+    public String subscribeEvent(
             String topic0,
             List<String> otherTopics,
             BigInteger fromBlock,
@@ -763,10 +763,10 @@ public void subscribeEvent(
         for (String otherTopic : otherTopics) {
             topics.add(Collections.singletonList(otherTopic));
         }
-        subscribeEvent(fromBlock, toBlock, topics, callback);
+        return subscribeEvent(fromBlock, toBlock, topics, callback);
     }
 
-    public void subscribeEvent(
+    public String subscribeEvent(
             BigInteger fromBlock,
             BigInteger toBlock,
             List<List<String>> topics,
@@ -781,7 +781,11 @@ public void subscribeEvent(
                 eventSubParams.addTopic(i, topic);
             }
         }
-        subscribeEvent(eventSubParams, callback);
+        return subscribeEvent(eventSubParams, callback);
+    }
+
+    public void unsubscribeEvent(String eventId) {
+        this.eventSubscribe.unsubscribeEvent(eventId);
     }
 
     public static EventValues staticExtractEventParameters(
diff --git a/src/main/java/org/fisco/bcos/sdk/v3/transaction/codec/decode/TransactionDecoderService.java b/src/main/java/org/fisco/bcos/sdk/v3/transaction/codec/decode/TransactionDecoderService.java
index b2790eea6..83a099d5d 100644
--- a/src/main/java/org/fisco/bcos/sdk/v3/transaction/codec/decode/TransactionDecoderService.java
+++ b/src/main/java/org/fisco/bcos/sdk/v3/transaction/codec/decode/TransactionDecoderService.java
@@ -92,6 +92,11 @@ public String decodeRevertMessage(String output) {
         if (output.length() <= 8) {
             return null;
         } else {
+            // only decode evm Error(string) message now
+            if (!RevertMessageParser.isOutputStartWithRevertMethod(output)) {
+                throw new RuntimeException(
+                        "Output is not start with revert method, maybe not a standard evm error.");
+            }
             // This revert msg encoder/decoder only use ABI
             FunctionReturnDecoderInterface functionReturnDecoderInterface =
                     new org.fisco.bcos.sdk.v3.codec.abi.FunctionReturnDecoder();