standalone method to get exception stack trace and message

src/Neo/SmartContract/ApplicationEngine.Helper.cs

@@ -12,15 +12,14 @@
 using Neo.SmartContract.Native;
 using Neo.VM;
 using System;
-using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 
 namespace Neo.SmartContract
 {
     public partial class ApplicationEngine : ExecutionEngine
     {
-        public string? GetEngineErrorInfo()
+        public string? GetEngineStackInfoOnFault(bool exceptionStackTrace = true, bool exceptionMessage = true)
         {
             if (State != VMState.FAULT || FaultException == null)
                 return null;
@@ -36,11 +35,22 @@ public partial class ApplicationEngine : ExecutionEngine
                 string contextContractName = NativeContract.ContractManagement.GetContract(SnapshotCache, contextScriptHash)?.Manifest.Name;
                 traceback.AppendLine($"\tInstructionPointer={context.InstructionPointer}, OpCode {context.CurrentInstruction?.OpCode}, Script Length={context.Script.Length} {contextScriptHash}[{contextContractName}]");
             }
-            Exception baseException = FaultException.GetBaseException();
-            traceback.AppendLine(baseException.StackTrace);
-            traceback.AppendLine(baseException.Message);
+            traceback.Append(GetEngineExceptionInfo(exceptionStackTrace: exceptionStackTrace, exceptionMessage: exceptionMessage));
 
             return traceback.ToString();
         }
+
+        public string? GetEngineExceptionInfo(bool exceptionStackTrace = true, bool exceptionMessage = true)
+        {
+            if (State != VMState.FAULT || FaultException == null)
+                return null;
+            StringBuilder traceback = new();
+            Exception baseException = FaultException.GetBaseException();
+            if (exceptionStackTrace)
+                traceback.AppendLine(baseException.StackTrace);
+            if (exceptionMessage)
+                traceback.AppendLine(baseException.Message);
+            return traceback.ToString();
+        }
     }
 }

tests/Neo.UnitTests/SmartContract/UT_ApplicationEngine.cs

@@ -167,10 +167,10 @@ public void TestSystem_Contract_Call_Permissions()
                 };
                 var currentScriptHash = engine.EntryScriptHash;
 
-                Assert.IsNull(engine.GetEngineErrorInfo());
+                Assert.IsNull(engine.GetEngineStackInfoOnFault());
                 Assert.AreEqual(VMState.FAULT, engine.Execute());
                 Assert.IsTrue(engine.FaultException.ToString().Contains($"Cannot Call Method disallowed Of Contract {scriptHash.ToString()}"));
-                string traceback = engine.GetEngineErrorInfo();
+                string traceback = engine.GetEngineStackInfoOnFault();
                 Assert.IsTrue(traceback.Contains($"Cannot Call Method disallowed Of Contract {scriptHash.ToString()}"));
                 Assert.IsTrue(traceback.Contains("CurrentScriptHash"));
                 Assert.IsTrue(traceback.Contains("EntryScriptHash"));