Merge NativeUpdateHistory with HardForks (#2941)

* Merge NativeUpdateHistory  with HardForks

* Change throw message

* Ensure Genesis is not configured

* Improve comment

* Remove Genesis from HF and follow the Anna suggestions

* Revert HF value changes

src/Neo/ProtocolSettings.cs

@@ -8,14 +8,13 @@
 // Redistribution and use in source and binary forms with or without
 // modifications are permitted.
 
-using Microsoft.Extensions.Configuration;
-using Neo.Cryptography.ECC;
-using Neo.Network.P2P.Payloads;
-using Neo.SmartContract.Native;
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Linq;
+using Microsoft.Extensions.Configuration;
+using Neo.Cryptography.ECC;
+using Neo.Network.P2P.Payloads;
 
 namespace Neo
 {
@@ -85,10 +84,8 @@ public record ProtocolSettings
         public uint MaxTraceableBlocks { get; init; }
 
         /// <summary>
-        /// Contains the update history of all native contracts.
+        /// Sets the block height from which a hardfork is activated.
         /// </summary>
-        public IReadOnlyDictionary<string, uint[]> NativeUpdateHistory { get; init; }
-
         public ImmutableDictionary<Hardfork, uint> Hardforks { get; init; }
 
         /// <summary>
@@ -149,18 +146,6 @@ public record ProtocolSettings
             MemoryPoolMaxTransactions = 50_000,
             MaxTraceableBlocks = 2_102_400,
             InitialGasDistribution = 52_000_000_00000000,
-            NativeUpdateHistory = new Dictionary<string, uint[]>
-            {
-                [nameof(ContractManagement)] = new[] { 0u },
-                [nameof(StdLib)] = new[] { 0u },
-                [nameof(CryptoLib)] = new[] { 0u },
-                [nameof(LedgerContract)] = new[] { 0u },
-                [nameof(NeoToken)] = new[] { 0u },
-                [nameof(GasToken)] = new[] { 0u },
-                [nameof(PolicyContract)] = new[] { 0u },
-                [nameof(RoleManagement)] = new[] { 0u },
-                [nameof(OracleContract)] = new[] { 0u }
-            },
             Hardforks = ImmutableDictionary<Hardfork, uint>.Empty
         };
 
@@ -202,9 +187,6 @@ public static ProtocolSettings Load(IConfigurationSection section)
                 MemoryPoolMaxTransactions = section.GetValue("MemoryPoolMaxTransactions", Default.MemoryPoolMaxTransactions),
                 MaxTraceableBlocks = section.GetValue("MaxTraceableBlocks", Default.MaxTraceableBlocks),
                 InitialGasDistribution = section.GetValue("InitialGasDistribution", Default.InitialGasDistribution),
-                NativeUpdateHistory = section.GetSection("NativeUpdateHistory").Exists()
-                    ? section.GetSection("NativeUpdateHistory").GetChildren().ToDictionary(p => p.Key, p => p.GetChildren().Select(q => uint.Parse(q.Value)).ToArray())
-                    : Default.NativeUpdateHistory,
                 Hardforks = section.GetSection("Hardforks").Exists()
                     ? section.GetSection("Hardforks").GetChildren().ToImmutableDictionary(p => Enum.Parse<Hardfork>(p.Key), p => uint.Parse(p.Value))
                     : Default.Hardforks

src/Neo/SmartContract/ApplicationEngine.Contract.cs

@@ -95,10 +95,7 @@ protected internal void CallNativeContract(byte version)
             NativeContract contract = NativeContract.GetContract(CurrentScriptHash);
             if (contract is null)
                 throw new InvalidOperationException("It is not allowed to use \"System.Contract.CallNative\" directly.");
-            uint[] updates = ProtocolSettings.NativeUpdateHistory[contract.Name];
-            if (updates.Length == 0)
-                throw new InvalidOperationException($"The native contract {contract.Name} is not active.");
-            if (updates[0] > NativeContract.Ledger.CurrentIndex(Snapshot))
+            if (!contract.IsActive(ProtocolSettings, NativeContract.Ledger.CurrentIndex(Snapshot)))
                 throw new InvalidOperationException($"The native contract {contract.Name} is not active.");
             contract.Invoke(this, version);
         }
@@ -157,9 +154,7 @@ protected internal async void NativeOnPersist()
                     throw new InvalidOperationException();
                 foreach (NativeContract contract in NativeContract.Contracts)
                 {
-                    uint[] updates = ProtocolSettings.NativeUpdateHistory[contract.Name];
-                    if (updates.Length == 0) continue;
-                    if (updates[0] <= PersistingBlock.Index)
+                    if (contract.IsActive(ProtocolSettings, PersistingBlock.Index))
                         await contract.OnPersist(this);
                 }
             }
@@ -181,9 +176,7 @@ protected internal async void NativePostPersist()
                     throw new InvalidOperationException();
                 foreach (NativeContract contract in NativeContract.Contracts)
                 {
-                    uint[] updates = ProtocolSettings.NativeUpdateHistory[contract.Name];
-                    if (updates.Length == 0) continue;
-                    if (updates[0] <= PersistingBlock.Index)
+                    if (contract.IsActive(ProtocolSettings, PersistingBlock.Index))
                         await contract.PostPersist(this);
                 }
             }

src/Neo/SmartContract/Native/ContractManagement.cs

@@ -106,18 +106,18 @@ internal override async ContractTask OnPersist(ApplicationEngine engine)
         {
             foreach (NativeContract contract in Contracts)
             {
-                uint[] updates = engine.ProtocolSettings.NativeUpdateHistory[contract.Name];
-                if (updates.Length == 0 || updates[0] != engine.PersistingBlock.Index)
-                    continue;
-                engine.Snapshot.Add(CreateStorageKey(Prefix_Contract).Add(contract.Hash), new StorageItem(new ContractState
+                if (contract.IsInitializeBlock(engine.ProtocolSettings, engine.PersistingBlock.Index))
                 {
-                    Id = contract.Id,
-                    Nef = contract.Nef,
-                    Hash = contract.Hash,
-                    Manifest = contract.Manifest
-                }));
-                engine.Snapshot.Add(CreateStorageKey(Prefix_ContractHash).AddBigEndian(contract.Id), new StorageItem(contract.Hash.ToArray()));
-                await contract.Initialize(engine);
+                    engine.Snapshot.Add(CreateStorageKey(Prefix_Contract).Add(contract.Hash), new StorageItem(new ContractState
+                    {
+                        Id = contract.Id,
+                        Nef = contract.Nef,
+                        Hash = contract.Hash,
+                        Manifest = contract.Manifest
+                    }));
+                    engine.Snapshot.Add(CreateStorageKey(Prefix_ContractHash).AddBigEndian(contract.Id), new StorageItem(contract.Hash.ToArray()));
+                    await contract.Initialize(engine);
+                }
             }
         }
 

src/Neo/SmartContract/Native/NativeContract.cs

@@ -87,6 +87,11 @@ public abstract class NativeContract
         /// </summary>
         public string Name => GetType().Name;
 
+        /// <summary>
+        /// Since Hardfork has to start having access to the native contract.
+        /// </summary>
+        public virtual Hardfork? ActiveIn { get; } = null;
+
         /// <summary>
         /// The nef of the native contract.
         /// </summary>
@@ -160,6 +165,42 @@ protected NativeContract()
             contractsDictionary.Add(Hash, this);
         }
 
+        /// <summary>
+        /// It is the initialize block
+        /// </summary>
+        /// <param name="settings">The <see cref="ProtocolSettings"/> where the HardForks are configured.</param>
+        /// <param name="index">Block index</param>
+        /// <returns>True if the native contract must be initialized</returns>
+        internal bool IsInitializeBlock(ProtocolSettings settings, uint index)
+        {
+            if (ActiveIn is null) return index == 0;
+
+            if (!settings.Hardforks.TryGetValue(ActiveIn.Value, out var activeIn))
+            {
+                return false;
+            }
+
+            return activeIn == index;
+        }
+
+        /// <summary>
+        /// Is the native contract active
+        /// </summary>
+        /// <param name="settings">The <see cref="ProtocolSettings"/> where the HardForks are configured.</param>
+        /// <param name="index">Block index</param>
+        /// <returns>True if the native contract is active</returns>
+        internal bool IsActive(ProtocolSettings settings, uint index)
+        {
+            if (ActiveIn is null) return true;
+
+            if (!settings.Hardforks.TryGetValue(ActiveIn.Value, out var activeIn))
+            {
+                return false;
+            }
+
+            return activeIn <= index;
+        }
+
         /// <summary>
         /// Checks whether the committee has witnessed the current transaction.
         /// </summary>

tests/Neo.UnitTests/UT_ProtocolSettings.cs

@@ -1,6 +1,5 @@
 using FluentAssertions;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using Neo.SmartContract.Native;
 using Neo.Wallets;
 
 namespace Neo.UnitTests
@@ -41,11 +40,5 @@ public void TestGetSeedList()
         {
             ProtocolSettings.Default.SeedList.Should().BeEquivalentTo(new string[] { "seed1.neo.org:10333", "seed2.neo.org:10333", "seed3.neo.org:10333", "seed4.neo.org:10333", "seed5.neo.org:10333", });
         }
-
-        [TestMethod]
-        public void TestNativeUpdateHistory()
-        {
-            ProtocolSettings.Default.NativeUpdateHistory.Count.Should().Be(NativeContract.Contracts.Count);
-        }
     }
 }