Move MaxTraceableBlocks to protocol

src/neo/Network/P2P/Payloads/Transaction.cs

@@ -19,7 +19,7 @@ namespace Neo.Network.P2P.Payloads
     public class Transaction : IEquatable<Transaction>, IInventory, IInteroperable
     {
         public const int MaxTransactionSize = 102400;
-        public const uint MaxValidUntilBlockIncrement = 2102400;
+        public const uint MaxValidUntilBlockIncrement = 5760; // 24 hour
         /// <summary>
         /// Maximum number of attributes that can be contained within a transaction
         /// </summary>

src/neo/ProtocolSettings.cs

@@ -15,6 +15,7 @@ public class ProtocolSettings
         public string[] SeedList { get; }
         public uint MillisecondsPerBlock { get; }
         public int MemoryPoolMaxTransactions { get; }
+        public uint MaxTraceableBlocks { get; }
 
         static ProtocolSettings _default;
 
@@ -94,6 +95,7 @@ private ProtocolSettings(IConfigurationSection section)
                 };
             this.MillisecondsPerBlock = section.GetValue("MillisecondsPerBlock", 15000u);
             this.MemoryPoolMaxTransactions = Math.Max(1, section.GetValue("MemoryPoolMaxTransactions", 50_000));
+            this.MaxTraceableBlocks = section.GetValue("MaxTraceableBlocks", 2_102_400u);// 365 days
         }
     }
 }

src/neo/SmartContract/ApplicationEngine.Blockchain.cs

@@ -8,8 +8,6 @@ namespace Neo.SmartContract
 {
     partial class ApplicationEngine
     {
-        public const uint MaxTraceableBlocks = Transaction.MaxValidUntilBlockIncrement;
-
         public static readonly InteropDescriptor System_Blockchain_GetHeight = Register("System.Blockchain.GetHeight", nameof(GetBlockchainHeight), 0_00000400, CallFlags.AllowStates, true);
         public static readonly InteropDescriptor System_Blockchain_GetBlock = Register("System.Blockchain.GetBlock", nameof(GetBlock), 0_02500000, CallFlags.AllowStates, true);
         public static readonly InteropDescriptor System_Blockchain_GetTransaction = Register("System.Blockchain.GetTransaction", nameof(GetTransaction), 0_01000000, CallFlags.AllowStates, true);
@@ -97,7 +95,7 @@ protected internal ContractState GetContract(UInt160 hash)
         private static bool IsTraceableBlock(StoreView snapshot, uint index)
         {
             if (index > snapshot.Height) return false;
-            return index + MaxTraceableBlocks > snapshot.Height;
+            return index + ProtocolSettings.Default.MaxTraceableBlocks > snapshot.Height;
         }
     }
 }

tests/neo.UnitTests/SmartContract/UT_Syscalls.cs

@@ -71,7 +71,7 @@ public void System_Blockchain_GetBlock()
                 // Not traceable block
 
                 var height = snapshot.BlockHashIndex.GetAndChange();
-                height.Index = block.Index + Transaction.MaxValidUntilBlockIncrement;
+                height.Index = block.Index + ProtocolSettings.Default.MaxTraceableBlocks;
 
                 var blocks = snapshot.Blocks;
                 var txs = snapshot.Transactions;