diff --git a/neo b/neo
index 26e9b6d..7d7c595 160000
--- a/neo
+++ b/neo
@@ -1 +1 @@
-Subproject commit 26e9b6df252678aefdb8ab625b0817a96dfa9732
+Subproject commit 7d7c59554466e7ee6bdbc09f478ba4c0cbeb604f
diff --git a/neo3-gui/neo3-gui/Common/Analyzers/ExecuteResultLogTracker.cs b/neo3-gui/neo3-gui/Common/Analyzers/ExecuteResultLogTracker.cs
index c856f1b..6c26957 100644
--- a/neo3-gui/neo3-gui/Common/Analyzers/ExecuteResultLogTracker.cs
+++ b/neo3-gui/neo3-gui/Common/Analyzers/ExecuteResultLogTracker.cs
@@ -11,13 +11,25 @@
 namespace Neo.Common.Analyzers
 {
 
-    public class ExecuteResultLogTracker : Plugin, IPersistencePlugin
+    public class ExecuteResultLogTracker : Plugin
     {
         private readonly LevelDbContext _levelDb = new LevelDbContext();
 
         private readonly HashSet<UInt160> _cachedAssets = new HashSet<UInt160>();
 
-        void IPersistencePlugin.OnPersist(NeoSystem system, Block block, DataCache snapshot, IReadOnlyList<Blockchain.ApplicationExecuted> applicationExecutedList)
+        public ExecuteResultLogTracker()
+        {
+            Blockchain.Committing += OnCommitting;
+            Blockchain.Committed += OnCommitted;
+        }
+
+        public override void Dispose()
+        {
+            Blockchain.Committing -= OnCommitting;
+            Blockchain.Committed -= OnCommitted;
+        }
+
+        void OnCommitting(NeoSystem system, Block block, DataCache snapshot, IReadOnlyList<Blockchain.ApplicationExecuted> applicationExecutedList)
         {
             Header header = snapshot.GetCurrentHeader();
             var analyzer = new BlockAnalyzer(snapshot, header, applicationExecutedList);
@@ -59,7 +71,7 @@ void IPersistencePlugin.OnPersist(NeoSystem system, Block block, DataCache snaps
         }
 
 
-        void IPersistencePlugin.OnCommit(NeoSystem system, Block block, DataCache snapshot)
+        void OnCommitted(NeoSystem system, Block block)
         {
             _levelDb.Commit();
         }
diff --git a/neo3-gui/neo3-gui/Common/Consoles/MainService.cs b/neo3-gui/neo3-gui/Common/Consoles/MainService.cs
index 6bcc07d..f129bea 100644
--- a/neo3-gui/neo3-gui/Common/Consoles/MainService.cs
+++ b/neo3-gui/neo3-gui/Common/Consoles/MainService.cs
@@ -148,8 +148,7 @@ public void CreateWallet(string path, string password)
                     break;
                 case ".json":
                     {
-                        NEP6Wallet wallet = new NEP6Wallet(path, CliSettings.Default.Protocol);
-                        wallet.Unlock(password);
+                        NEP6Wallet wallet = new NEP6Wallet(path, password, CliSettings.Default.Protocol);
                         WalletAccount account = wallet.CreateAccount();
                         wallet.Save();
                         Console.WriteLine($"address: {account.Address}");
@@ -306,7 +305,7 @@ private bool OnInvokeCommand(string[] args)
             {
                 scriptBuilder.EmitDynamicCall(scriptHash, args[2], contractParameters.ToArray());
                 tx.Script = scriptBuilder.ToArray();
-                Console.WriteLine($"Invoking script with: '{tx.Script.ToHexString()}'");
+                Console.WriteLine($"Invoking script with: '{tx.Script.ToArray().ToHexString()}'");
             }
 
             using (ApplicationEngine engine = tx.Script.RunTestMode(null, tx))
@@ -1261,8 +1260,7 @@ public void OpenWallet(string path, string password)
             }
             else
             {
-                NEP6Wallet nep6wallet = new NEP6Wallet(path, CliSettings.Default.Protocol);
-                nep6wallet.Unlock(password);
+                NEP6Wallet nep6wallet = new NEP6Wallet(path, password, CliSettings.Default.Protocol);
                 CurrentWallet = nep6wallet;
             }
         }
diff --git a/neo3-gui/neo3-gui/Common/Utility/OpCodeConverter.cs b/neo3-gui/neo3-gui/Common/Utility/OpCodeConverter.cs
index 4fa70ac..1ba8519 100644
--- a/neo3-gui/neo3-gui/Common/Utility/OpCodeConverter.cs
+++ b/neo3-gui/neo3-gui/Common/Utility/OpCodeConverter.cs
@@ -22,7 +22,7 @@ public class OpCodeConverter
         static OpCodeConverter()
         {
             //初始化所有 InteropService Method
-            _interopServiceMap = ApplicationEngine.Services.ToDictionary(s=>s.Key,s=>s.Value.Name);
+            _interopServiceMap = ApplicationEngine.Services.ToDictionary(s => s.Key, s => s.Value.Name);
             //初始化所有 OpCode OperandSize
             foreach (FieldInfo field in typeof(OpCode).GetFields(BindingFlags.Public | BindingFlags.Static))
             {
@@ -39,6 +39,13 @@ public static string ToAsciiString(byte[] byteArray)
             if (output.Any(p => p < '0' || p > 'z')) return byteArray.ToHexString();
             return output;
         }
+
+
+        public static List<InstructionInfo> Parse(ReadOnlyMemory<byte> scripts)
+        {
+            return Parse(scripts.ToArray());
+        }
+
         public static List<InstructionInfo> Parse(byte[] scripts)
         {
             var result = new List<InstructionInfo>();
@@ -50,7 +57,7 @@ public static List<InstructionInfo> Parse(byte[] scripts)
                     var instruction = s.GetInstruction(ip);
 
                     var instructionInfo = new InstructionInfo()
-                        {OpCode = instruction.OpCode, Position = ip, OpData = instruction.Operand.ToArray()};
+                    { OpCode = instruction.OpCode, Position = ip, OpData = instruction.Operand.ToArray() };
 
                     if (instruction.OpCode == OpCode.SYSCALL)
                     {
@@ -68,7 +75,7 @@ public static List<InstructionInfo> Parse(byte[] scripts)
             {
                 Console.WriteLine($"{scripts.ToHexString()}:{e}");
             }
-     
+
             return result;
         }
 
diff --git a/neo3-gui/neo3-gui/Helpers.cs b/neo3-gui/neo3-gui/Helpers.cs
index f961be9..0fe4159 100644
--- a/neo3-gui/neo3-gui/Helpers.cs
+++ b/neo3-gui/neo3-gui/Helpers.cs
@@ -46,6 +46,7 @@
 using VmArray = Neo.VM.Types.Array;
 using JsonSerializer = System.Text.Json.JsonSerializer;
 using Pointer = Neo.VM.Types.Pointer;
+using Neo.SmartContract.Iterators;
 
 namespace Neo
 {
@@ -55,7 +56,7 @@ public static class Helpers
         public static readonly JsonSerializerOptions SerializeOptions = new JsonSerializerOptions
         {
             PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
-            IgnoreNullValues = true,
+            DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
             PropertyNameCaseInsensitive = true,
             Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
             Converters =
@@ -628,7 +629,7 @@ public static AccountType GetAccountType(this WalletAccount account, DataCache s
         {
             if (account.Contract != null)
             {
-                if (account.Contract.Script.IsMultiSigContract(out _, out int _))
+                if (account.Contract.Script.IsMultiSigContract())
                 {
                     return AccountType.MultiSignature;
                 }
@@ -1179,6 +1180,12 @@ public static NotificationInfo ToNotificationInfo(this NotifyEventArgs notify)
             return notification;
         }
 
+        public static ApplicationEngine RunTestMode(this ReadOnlyMemory<byte> script, DataCache snapshot, IVerifiable container = null)
+        {
+            return ApplicationEngine.Run(script, snapshot ?? GetDefaultSnapshot(), container, settings: CliSettings.Default.Protocol, gas: Constant.TestMode);
+        }
+
+
         public static ApplicationEngine RunTestMode(this byte[] script, DataCache snapshot, IVerifiable container = null)
         {
             return ApplicationEngine.Run(script, snapshot ?? GetDefaultSnapshot(), container, settings: CliSettings.Default.Protocol, gas: Constant.TestMode);
@@ -1427,5 +1434,46 @@ public static string ToBase64String(this ReadOnlySpan<byte> data)
         {
             return data.ToArray().ToBase64String();
         }
+
+        public static string ToBase64String(this Memory<byte> data)
+        {
+            return data.ToArray().ToBase64String();
+        }
+
+
+        public static bool IsSignatureContract(this byte[] script)
+        {
+            return Neo.SmartContract.Helper.IsSignatureContract(script);
+        }
+
+        public static bool IsMultiSigContract(this byte[] script)
+        {
+            return Neo.SmartContract.Helper.IsMultiSigContract(script);
+        }
+
+
+        public static (ECPoint PublicKey, BigInteger Votes)[] GetCandidates(this DataCache snapshot)
+        {
+            var sb = new ScriptBuilder();
+            sb.EmitDynamicCall(NativeContract.NEO.Hash, "getCandidates");
+            var engine = sb.ToArray().RunTestMode(snapshot);
+            var array = engine.ResultStack.Pop() as VmArray;
+            var list = new List<(ECPoint PublicKey, BigInteger Votes)>();
+            if (array.Count > 0)
+            {
+                foreach (Struct item in array)
+                {
+                    list.Add((ECPoint.FromBytes(item[0].GetSpan().ToArray(), ECCurve.Secp256r1), item[1].GetInteger()));
+                }
+
+            }
+            //var iterator = iop.GetInterface<IIterator>();
+            //var first = iterator.Value;
+            //while (iterator.Next())
+            //{
+            //    var val = iterator.Value;
+            //}
+            return list.ToArray();
+        }
     }
 }
diff --git a/neo3-gui/neo3-gui/Models/Contracts/ContractModel.cs b/neo3-gui/neo3-gui/Models/Contracts/ContractModel.cs
index 57c732c..d53de2e 100644
--- a/neo3-gui/neo3-gui/Models/Contracts/ContractModel.cs
+++ b/neo3-gui/neo3-gui/Models/Contracts/ContractModel.cs
@@ -12,7 +12,7 @@ public class ContractModel
         public ContractModel(ContractState contract)
         {
             ContractId = contract.Id;
-            Script = contract.Script;
+            Script = contract.Script.ToArray();
             Manifest = new ManifestModel(contract.Manifest);
         }
 
diff --git a/neo3-gui/neo3-gui/Models/Transactions/TransactionModel.cs b/neo3-gui/neo3-gui/Models/Transactions/TransactionModel.cs
index 29245e8..ee300ab 100644
--- a/neo3-gui/neo3-gui/Models/Transactions/TransactionModel.cs
+++ b/neo3-gui/neo3-gui/Models/Transactions/TransactionModel.cs
@@ -19,8 +19,8 @@ public TransactionModel(Transaction tx)
             TxId = tx.Hash;
             NetworkFee = new BigDecimal((BigInteger)tx.NetworkFee, NativeContract.GAS.Decimals);
             Nonce = tx.Nonce;
-            Script = tx.Script;
-            
+            Script = tx.Script.ToArray();
+
             Sender = tx.Sender;
             SystemFee = new BigDecimal((BigInteger)tx.SystemFee, NativeContract.GAS.Decimals);
             ValidUntilBlock = tx.ValidUntilBlock;
@@ -34,7 +34,7 @@ public TransactionModel(Transaction tx)
             Witnesses = tx.Witnesses?.Select(w => new WitnessModel(w)
             ).ToList();
 
-            if (tx.Script != null)
+            if (tx.Script.Length > 0)
             {
                 ScriptCode = OpCodeConverter.Parse(tx.Script);
             }
diff --git a/neo3-gui/neo3-gui/Models/Transactions/WitnessModel.cs b/neo3-gui/neo3-gui/Models/Transactions/WitnessModel.cs
index fbbe637..4c9f450 100644
--- a/neo3-gui/neo3-gui/Models/Transactions/WitnessModel.cs
+++ b/neo3-gui/neo3-gui/Models/Transactions/WitnessModel.cs
@@ -12,8 +12,8 @@ public WitnessModel(Witness witness)
         {
             if (witness != null)
             {
-                InvocationScript = witness.InvocationScript;
-                VerificationScript = witness.VerificationScript;
+                InvocationScript = witness.InvocationScript.ToArray();
+                VerificationScript = witness.VerificationScript.ToArray();
                 ScriptHash = witness.ScriptHash;
                 InvocationOpCode = OpCodeConverter.Parse(witness.InvocationScript);
                 VerificationOpCode = OpCodeConverter.Parse(witness.VerificationScript);
diff --git a/neo3-gui/neo3-gui/Plugins/LevelDBStore.dll b/neo3-gui/neo3-gui/Plugins/LevelDBStore.dll
index 2e1a4e6..be67fdd 100644
Binary files a/neo3-gui/neo3-gui/Plugins/LevelDBStore.dll and b/neo3-gui/neo3-gui/Plugins/LevelDBStore.dll differ
diff --git a/neo3-gui/neo3-gui/Services/ApiServices/ContractApiService.cs b/neo3-gui/neo3-gui/Services/ApiServices/ContractApiService.cs
index e468dcb..d3c513a 100644
--- a/neo3-gui/neo3-gui/Services/ApiServices/ContractApiService.cs
+++ b/neo3-gui/neo3-gui/Services/ApiServices/ContractApiService.cs
@@ -95,7 +95,7 @@ public async Task<object> DeployContract(string nefPath, string manifestPath = n
             // Read manifest
             ContractManifest manifest = ReadManifestFile(manifestPath);
             // Basic script checks
-            await CheckBadOpcode(nefFile.Script);
+            await CheckBadOpcode(nefFile.Script.ToArray());
 
             // Build script
             using ScriptBuilder sb = new ScriptBuilder();
@@ -168,7 +168,7 @@ public async Task<object> UpdateContract(UInt160 contractHash, string nefPath, s
             // Read manifest
             ContractManifest manifest = ReadManifestFile(manifestPath);
             // Basic script checks
-            await CheckBadOpcode(nefFile.Script);
+            await CheckBadOpcode(nefFile.Script.ToArray());
 
             // Build script
             using ScriptBuilder sb = new ScriptBuilder();
@@ -456,7 +456,8 @@ public async Task<object> GetValidators()
         {
             var snapshot = Helpers.GetDefaultSnapshot();
             var validators = NativeContract.NEO.GetCommittee(snapshot);
-            var candidates = NativeContract.NEO.GetCandidates(snapshot);
+            //var candidates = NativeContract.NEO.GetCandidates(snapshot);
+            var candidates = snapshot.GetCandidates();
             return candidates.OrderByDescending(v => v.Votes).Select(p => new ValidatorModel
             {
                 Publickey = p.PublicKey.ToString(),
@@ -468,6 +469,7 @@ public async Task<object> GetValidators()
 
 
 
+
         /// <summary>
         /// apply for new validator
         /// </summary>
@@ -493,7 +495,8 @@ public async Task<object> ApplyForValidator(string pubkey)
                 return Error(ErrorCode.InvalidPara);
             }
             var snapshot = Helpers.GetDefaultSnapshot();
-            var candidates = NativeContract.NEO.GetCandidates(snapshot);
+            //var candidates = NativeContract.NEO.GetCandidates(snapshot);
+            var candidates = snapshot.GetCandidates();
             if (candidates.Any(v => v.PublicKey.Equals(publicKey)))
             {
                 return Error(ErrorCode.ValidatorAlreadyExist);
@@ -573,7 +576,7 @@ private NefFile ReadNefFile(string nefPath)
             {
                 throw new WsException(ErrorCode.ExceedMaxTransactionSize);
             }
-            using var stream = new BinaryReader(File.OpenRead(nefPath), Encoding.UTF8, false);
+            var stream = new MemoryReader(File.ReadAllBytes(nefPath));
             try
             {
                 return stream.ReadSerializable<NefFile>();
diff --git a/neo3-gui/neo3-gui/Services/ApiServices/WalletApiService.cs b/neo3-gui/neo3-gui/Services/ApiServices/WalletApiService.cs
index 3ccd53f..8f09227 100644
--- a/neo3-gui/neo3-gui/Services/ApiServices/WalletApiService.cs
+++ b/neo3-gui/neo3-gui/Services/ApiServices/WalletApiService.cs
@@ -108,8 +108,7 @@ public async Task<object> CreateWallet(string path, string password, string priv
                         break;
                     case ".json":
                         {
-                            NEP6Wallet wallet = new NEP6Wallet(path, CliSettings.Default.Protocol);
-                            wallet.Unlock(password);
+                            NEP6Wallet wallet = new NEP6Wallet(path, password, CliSettings.Default.Protocol);
                             var account = hexPrivateKey.NotEmpty() ? wallet.CreateAccount(hexPrivateKey) : wallet.CreateAccount();
                             wallet.Save();
                             result.Accounts.Add(new AccountModel()
diff --git a/neo3-gui/neo3-gui/config.private.json b/neo3-gui/neo3-gui/config.private.json
index b0c24ae..f885d35 100644
--- a/neo3-gui/neo3-gui/config.private.json
+++ b/neo3-gui/neo3-gui/config.private.json
@@ -7,7 +7,7 @@
     },
     "Storage": {
       "Engine": "LevelDBStore",
-      "Path": "Data_LevelDB_4444"
+      "Path": "Data_LevelDB_330"
     },
     "P2P": {
       "Port": 30333,
@@ -16,7 +16,7 @@
     "PluginURL": "https://github.com/neo-project/neo-modules/releases/download/v{1}/{0}.zip"
   },
   "ProtocolConfiguration": {
-    "Network": 4444,
+    "Network": 330,
     "MillisecondsPerBlock": 15000,
     "MaxTraceableBlocks": 2102400,
     "ValidatorsCount": 1,
diff --git a/neo3-gui/neo3-gui/neo3-gui.csproj b/neo3-gui/neo3-gui/neo3-gui.csproj
index 06795cb..74bde1b 100644
--- a/neo3-gui/neo3-gui/neo3-gui.csproj
+++ b/neo3-gui/neo3-gui/neo3-gui.csproj
@@ -24,13 +24,13 @@
 
   <ItemGroup>
     <PackageReference Include="EFCore.BulkExtensions" Version="3.1.1" />
-    <PackageReference Include="Neo" Version="3.1.0" />
+    <!--<PackageReference Include="Neo" Version="3.1.0" />-->
     <PackageReference Include="Neo.LevelDb.Dev" Version="3.0.0-pre4" />
     <PackageReference Include="System.ServiceProcess.ServiceController" Version="4.6.0" />
   </ItemGroup>
 
   <ItemGroup>
-    <!--<ProjectReference Include="..\..\neo\src\neo\neo.csproj" />-->
+    <ProjectReference Include="..\..\neo\src\neo\neo.csproj" />
   </ItemGroup>
 
   <ItemGroup>