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Allow contracts to load script at runtime dynamically #2756

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merged 12 commits into from
Sep 16, 2022
Merged

Allow contracts to load script at runtime dynamically #2756

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a8162b9
Allow contracts to load script at runtime dynamically
erikzhang May 24, 2022
42fc47a
Improve
erikzhang May 24, 2022
d703e55
Merge branch 'master' into runtime-loadscript
erikzhang Jul 13, 2022
01f4279
Merge branch 'master' into runtime-loadscript
erikzhang Jul 19, 2022
607bc6f
Prevent notifications in dynamic scripts
erikzhang Jul 19, 2022
d9a65cc
Fix UT
erikzhang Jul 19, 2022
44ca4bc
Fix CalledByEntryCondition
erikzhang Jul 21, 2022
d3fea5d
rename
erikzhang Jul 22, 2022
5ed04df
Merge branch 'master' into runtime-loadscript
erikzhang Jul 23, 2022
4e10a2d
Merge branch 'master' into runtime-loadscript
erikzhang Aug 4, 2022
dab9c4d
readonly
erikzhang Aug 4, 2022
4f89214
Merge branch 'master' into runtime-loadscript
erikzhang Sep 6, 2022
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28 changes: 28 additions & 0 deletions src/Neo/SmartContract/ApplicationEngine.Runtime.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
using Neo.IO;
using Neo.Network.P2P.Payloads;
using Neo.SmartContract.Native;
using Neo.VM;
using Neo.VM.Types;
using System;
using System.Collections.Generic;
Expand Down Expand Up @@ -90,6 +91,12 @@ partial class ApplicationEngine
/// </summary>
public static readonly InteropDescriptor System_Runtime_GetEntryScriptHash = Register("System.Runtime.GetEntryScriptHash", nameof(EntryScriptHash), 1 << 4, CallFlags.None);

/// <summary>
/// The <see cref="InteropDescriptor"/> of System.Runtime.LoadScript.
/// Loads a script at rumtime.
/// </summary>
public static readonly InteropDescriptor System_Runtime_LoadScript = Register("System.Runtime.LoadScript", nameof(RuntimeLoadScript), 1 << 15, CallFlags.AllowCall);

/// <summary>
/// The <see cref="InteropDescriptor"/> of System.Runtime.CheckWitness.
/// Determines whether the specified account has witnessed the current transaction.
Expand Down Expand Up @@ -189,6 +196,27 @@ protected internal StackItem GetScriptContainer()
return interop.ToStackItem(ReferenceCounter);
}

/// <summary>
/// The implementation of System.Runtime.LoadScript.
/// Loads a script at rumtime.
/// </summary>
protected internal void RuntimeLoadScript(byte[] script, CallFlags callFlags, Array args)
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{
if ((callFlags & ~CallFlags.All) != 0)
throw new ArgumentOutOfRangeException(nameof(callFlags));

ExecutionContextState state = CurrentContext.GetState<ExecutionContextState>();
ExecutionContext context = LoadScript(script, configureState: p =>
{
p.CallingContext = CurrentContext;
p.CallFlags = callFlags & state.CallFlags & CallFlags.ReadOnly;
p.IsDynamicCall = true;
});

for (int i = args.Count - 1; i >= 0; i--)
context.EvaluationStack.Push(args[i]);
}

/// <summary>
/// The implementation of System.Runtime.CheckWitness.
/// Determines whether the specified account has witnessed the current transaction.
Expand Down