Add oracle Request/Response event

src/neo/SmartContract/Native/Oracle/OracleContract.cs

@@ -1,6 +1,7 @@
 #pragma warning disable IDE0051
 
 using Neo.Cryptography;
+using Neo.IO;
 using Neo.Ledger;
 using Neo.Network.P2P.Payloads;
 using Neo.Persistence;
@@ -34,6 +35,56 @@ public sealed class OracleContract : NativeContract
         internal OracleContract()
         {
             Manifest.Features = ContractFeatures.HasStorage;
+
+            var events = new List<ContractEventDescriptor>(Manifest.Abi.Events)
+            {
+                new ContractEventDescriptor
+                {
+                    Name = "OracleRequest",
+                    Parameters = new ContractParameterDefinition[]
+                    {
+                        new ContractParameterDefinition()
+                        {
+                            Name = "Id",
+                            Type = ContractParameterType.Integer
+                        },
+                        new ContractParameterDefinition()
+                        {
+                            Name = "RequestContract",
+                            Type = ContractParameterType.Hash160
+                        },
+                        new ContractParameterDefinition()
+                        {
+                            Name = "Url",
+                            Type = ContractParameterType.String
+                        },
+                        new ContractParameterDefinition()
+                        {
+                            Name = "Filter",
+                            Type = ContractParameterType.String
+                        }
+                    }
+                },
+                new ContractEventDescriptor
+                {
+                    Name = "OracleResponse",
+                    Parameters = new ContractParameterDefinition[]
+                    {
+                        new ContractParameterDefinition()
+                        {
+                            Name = "Id",
+                            Type = ContractParameterType.Integer
+                        },
+                        new ContractParameterDefinition()
+                        {
+                            Name = "OriginalTx",
+                            Type = ContractParameterType.Hash256
+                        }
+                    }
+                }
+            };
+
+            Manifest.Abi.Events = events.ToArray();
         }
 
         [ContractMethod(0, CallFlags.AllowModifyStates)]
@@ -44,6 +95,7 @@ private void Finish(ApplicationEngine engine)
             if (response == null) throw new ArgumentException("Oracle response was not found");
             OracleRequest request = GetRequest(engine.Snapshot, response.Id);
             if (request == null) throw new ArgumentException("Oracle request was not found");
+            engine.SendNotification(Hash, "OracleResponse", new VM.Types.Array { response.Id, request.OriginalTxid.ToArray() });
             StackItem userData = BinarySerializer.Deserialize(request.UserData, engine.Limits.MaxStackSize, engine.Limits.MaxItemSize, engine.ReferenceCounter);
             engine.CallFromNativeContract(null, request.CallbackContract, request.CallbackMethod, request.Url, userData, (int)response.Code, response.Result);
         }
@@ -161,6 +213,8 @@ private void Request(ApplicationEngine engine, string url, string filter, string
             if (list.Count >= 256)
                 throw new InvalidOperationException("There are too many pending responses for this url");
             list.Add(id);
+
+            engine.SendNotification(Hash, "OracleRequest", new VM.Types.Array { id, engine.CallingScriptHash.ToArray(), url, filter });
         }
 
         [ContractMethod(0_01000000, CallFlags.None)]