Fix contract balance transfer

src/Lachain.Core/Blockchain/Hardfork/HardforkConfig.cs

@@ -19,5 +19,6 @@ public class HardforkConfig
         [JsonProperty("hardfork_13")] public ulong? Hardfork_13 { get; set; }
         [JsonProperty("hardfork_14")] public ulong? Hardfork_14 { get; set; }
         [JsonProperty("hardfork_15")] public ulong? Hardfork_15 { get; set; }
+        [JsonProperty("hardfork_16")] public ulong? Hardfork_16 { get; set; }
     }
 }

src/Lachain.Core/Blockchain/Hardfork/HardforkHeights.cs

@@ -20,6 +20,7 @@ public static class HardforkHeights
         private static ulong Hardfork_13;
         private static ulong Hardfork_14;
         private static ulong Hardfork_15;
+        private static ulong Hardfork_16;
 
         //we need this value as default deploy height
         public static ulong GetHardfork_3() 
@@ -102,6 +103,11 @@ public static bool IsHardfork_15Active(ulong height)
         {
             return height >= Hardfork_15;
         }
+
+        public static bool IsHardfork_16Active(ulong height)
+        {
+            return height >= Hardfork_16;
+        }
 
         public static void SetHardforkHeights(HardforkConfig hardforkConfig)
         {
@@ -169,6 +175,10 @@ public static void SetHardforkHeights(HardforkConfig hardforkConfig)
             if(hardforkConfig.Hardfork_15 is null)
                 throw new Exception("hardfork_15 is null");
             Hardfork_15 = (ulong) hardforkConfig.Hardfork_15;
+
+            if(hardforkConfig.Hardfork_16 is null)
+                throw new Exception("hardfork_16 is null");
+            Hardfork_16 = (ulong) hardforkConfig.Hardfork_16;
         }
     }
 }

src/Lachain.Core/Blockchain/VM/ExternalHandler.cs

@@ -1484,10 +1484,28 @@ private static bool TransferBalance(
             UInt160 from, UInt160 to, Money value, IExecutionFrame frame
         )
         {
+            Logger.LogTrace($"Transfer balance of {value.ToString()} is requested from {from.ToHex()} to {to.ToHex()}");
             var receipt = frame.InvocationContext.Receipt;
             var snapshot = frame.InvocationContext.Snapshot;
             var height = snapshot.Blocks.GetTotalBlockHeight();
-            if (HardforkHeights.IsHardfork_15Active(height))
+            if (HardforkHeights.IsHardfork_16Active(height))
+            {
+                var contract = snapshot.Contracts.GetContractByHash(from);
+                if (contract is null)
+                {
+                    // balance transfer from plain address
+                    return snapshot.Balances.TransferBalance(
+                        from, to, value, receipt,
+                        HardforkHeights.IsHardfork_15Active(height), HardforkHeights.IsHardfork_9Active(height)
+                    );
+                }
+                else
+                {
+                    // allow balance transfer from contract address
+                    return snapshot.Balances.TransferContractBalance(from, to, value);
+                }
+            }
+            else if (HardforkHeights.IsHardfork_15Active(height))
             {
                 var contract = snapshot.Contracts.GetContractByHash(from);
                 if (contract is null)

src/Lachain.Core/Config/ConfigManager.cs

@@ -14,7 +14,7 @@ namespace Lachain.Core.Config
 {
     public class ConfigManager : IConfigManager
     {
-        private const ulong _CurrentVersion = 18;
+        private const ulong _CurrentVersion = 19;
         private IDictionary<string, object> _config;
         public string ConfigPath { get; }
         public RunOptions CommandLineOptions { get; }
@@ -51,7 +51,7 @@ public void UpdateWalletPassword(string password)
         private void _UpdateConfigVersion()
         {
             ulong version = 1;
-            version = GetConfig<VersionConfig>("version")?.Version ?? 1;
+            version = GetConfig<VersionConfig>("versionInfo")?.Version ?? 1;
             if (version > _CurrentVersion)
                 throw new ApplicationException("Unknown config version");
             if (version == _CurrentVersion)
@@ -90,6 +90,8 @@ private void _UpdateConfigVersion()
                 _UpdateConfigToV17();
             if (version < 18)
                 _UpdateConfigToV18();
+            if (version < 19)
+                _UpdateConfigToV19();
             version = GetConfig<VersionConfig>("version")?.Version ??
                 throw new ApplicationException("No version section in config");
             if (version != _CurrentVersion)
@@ -547,6 +549,32 @@ private void _UpdateConfigToV18()
 
             _SaveCurrentConfig();
         }
+
+        // version 19 of config should contain hardfork_16
+        private void _UpdateConfigToV19()
+        {   
+            var network = GetConfig<NetworkConfig>("network") ??
+                          throw new ApplicationException("No network section in config");
+
+            var hardforks = GetConfig<HardforkConfig>("hardfork") ??
+                            throw new ApplicationException("No hardfork section in config");
+            hardforks.Hardfork_16 ??= network.NetworkName switch
+            {
+                "mainnet" => 8028800,
+                "testnet" => 7751300,
+                "devnet" => 7887130,
+                _ => 0
+            };
+            _config["hardfork"] = JObject.FromObject(hardforks);
+
+            var version = GetConfig<VersionConfig>("version") ??
+                          throw new ApplicationException("No version section in config");
+
+            version.Version = 19;
+            _config["version"] = JObject.FromObject(version);
+
+            _SaveCurrentConfig();
+        }
 
         private void _SaveCurrentConfig()
         {