bool CheckWitness(ExecutionEngineBase engine)
{
// Fake CheckWitness
var context = engine.CurrentContext;
{
if (context == null)
{
return(false);
}
if (!context.EvaluationStack.TryPop(out StackItemBase it))
{
return(false);
}
using (it)
{
if (it.ToByteArray() == null)
{
return(false);
}
using (var itb = engine.CreateBool(true))
context.EvaluationStack.Push(itb);
}
}
return(true);
}
private bool Contract_GetStorageContext(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
var stack = ctx.EvaluationStack;
var contract = stack.PopObject <Contract>();
if (!_contractsCreated.TryGetValue(contract.ScriptHash, out var created))
{
return(false);
}
if (!created.Equals(new UInt160(engine.CurrentContext.ScriptHash)))
{
return(false);
}
stack.PushObject(new StorageContext
{
ScriptHash = contract.ScriptHash,
IsReadOnly = false
});
return(true);
}
private StackItemBase DeserializeStackItem(ExecutionEngineBase engine, BinaryReader reader)
{
EStackItemType type = (EStackItemType)reader.ReadByte();
switch (type)
{
case EStackItemType.ByteArray:
return(engine.CreateByteArray(reader.ReadVarBytes()));
case EStackItemType.Bool:
return(engine.CreateBool(reader.ReadBoolean()));
case EStackItemType.Integer:
return(engine.CreateInteger(new BigInteger(reader.ReadVarBytes())));
case EStackItemType.Array:
case EStackItemType.Struct:
{
ArrayStackItemBase array;
if (type == EStackItemType.Struct)
{
array = engine.CreateStruct();
}
else
{
array = engine.CreateArray();
}
ulong count = reader.ReadVarInt();
while (count-- > 0)
{
array.Add(DeserializeStackItem(engine, reader));
}
return(array);
}
case EStackItemType.Map:
{
var map = engine.CreateMap();
ulong count = reader.ReadVarInt();
while (count-- > 0)
{
StackItemBase key = DeserializeStackItem(engine, reader);
StackItemBase value = DeserializeStackItem(engine, reader);
map[key] = value;
key.Dispose();
value.Dispose();
}
return(map);
}
default: throw new FormatException();
}
}
protected virtual bool Runtime_CheckWitness(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
bool result;
var hashOrPubkey = ctx.EvaluationStack.PopByteArray();
if (hashOrPubkey.Length == 20)
{
result = CheckWitness(engine, new UInt160(hashOrPubkey));
}
else if (hashOrPubkey.Length == 33)
{
result = CheckWitness(engine, new ECPoint(hashOrPubkey));
}
else
{
return(false);
}
ctx.EvaluationStack.Push(result);
return(true);
}
void CheckItem(ExecutionEngineBase engine, StackItemBase item)
{
int c = engine.ResultStack.Count;
engine.ResultStack.Push(item);
Assert.AreEqual(engine.ResultStack.Count, c + 1);
Assert.IsTrue(engine.ResultStack.TryPeek(0, out StackItemBase obj));
// PEEK
obj.Dispose();
obj = engine.ResultStack.Peek(0);
Assert.IsNotNull(obj);
Assert.AreEqual(obj.Type, item.Type);
Assert.IsTrue(obj.Equals(item));
// POP
obj.Dispose();
obj = engine.ResultStack.Pop();
Assert.AreEqual(engine.ResultStack.Count, c);
Assert.IsNotNull(obj);
Assert.AreEqual(obj.Type, item.Type);
Assert.IsTrue(obj.Equals(item));
obj.Dispose();
}
private bool Contract_Destroy(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
var stack = ctx.EvaluationStack;
var hash = new UInt160(engine.CurrentContext.ScriptHash);
var contract = _contracts.TryGet(hash);
if (contract == null)
{
return(true);
}
_contracts.Delete(hash);
if (contract.HasStorage)
{
foreach (var pair in _storages.Find(hash.ToArray()))
{
_storages.Delete(pair.Key);
}
}
return(true);
}
protected bool CheckWitness(ExecutionEngineBase engine, UInt160 hash)
{
// TODO: IVerifiable?
//IVerifiable container = (IVerifiable)engine.MessageProvider;
//UInt160[] _hashes_for_verifying = container.GetScriptHashesForVerifying();
//return _hashes_for_verifying.Contains(hash);
return(true);
}
/// <summary>
/// Assert result
/// </summary>
/// <param name="engine">Engine</param>
/// <param name="result">Result</param>
/// <param name="logBag">Log bag</param>
/// <param name="notBag">Not bag</param>
/// <param name="message">Message</param>
private void AssertResult(ExecutionEngineBase engine, VMUTExecutionEngineState result, List <string> logBag, List <JToken> notBag, string message)
{
AssertAreEqual(engine.State.ToString(), result.State.ToString(), message + "State is different");
AssertAreEqual(engine.ConsumedGas, result.ConsumedGas, message + "Consumed gas is different");
AssertAreEqual(logBag.ToArray(), result.Logs ?? new string[0], message + "Logs are different");
AssertAreEqual(notBag.ToArray(), result.Notifications == null ? new JToken[0] : result.Notifications.Select(u => PrepareJsonItem(u)).ToArray(), message + "Notifies are different");
AssertResult(engine.InvocationStack, result.InvocationStack, message);
AssertResult(engine.ResultStack, result.ResultStack, message);
}
private bool Asset_Create(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
var stack = ctx.EvaluationStack;
//var tx = (InvocationTransaction)engine.MessageProvider;
//var assetType = (AssetType)(byte)stack.PopBigInteger();
//if (!Enum.IsDefined(typeof(AssetType), assetType) || assetType == AssetType.CreditFlag || assetType == AssetType.DutyFlag || assetType == AssetType.GoverningToken || assetType == AssetType.UtilityToken)
// return false;
//if (stack.PeekByteArray().Length > 1024)
// return false;
//var name = Encoding.UTF8.GetString(stack.PopByteArray());
//var amount = new Fixed8((long)stack.PopBigInteger());
//if (amount == Fixed8.Zero || amount < -Fixed8.Satoshi) return false;
//if (assetType == AssetType.Invoice && amount != -Fixed8.Satoshi)
// return false;
//var precision = (byte)stack.PopBigInteger();
//if (precision > 8) return false;
//if (assetType == AssetType.Share && precision != 0) return false;
//if (amount != -Fixed8.Satoshi && amount.GetData() % (long)Math.Pow(10, 8 - precision) != 0)
// return false;
//ECPoint owner = ECPoint.DecodePoint(stack.PopByteArray(), ECCurve.Secp256r1);
//if (owner.IsInfinity) return false;
//if (!CheckWitness(engine, owner))
// return false;
//var admin = new UInt160(stack.PopByteArray());
//var issuer = new UInt160(stack.PopByteArray());
//Asset asset = _assets.GetOrAdd(tx.Hash, () => new Asset
//{
// Id = tx.Hash,
// AssetType = assetType,
// Name = name,
// Amount = amount,
// Available = Fixed8.Zero,
// Precision = precision,
// Fee = Fixed8.Zero,
// FeeAddress = new UInt160(),
// Owner = owner,
// Admin = admin,
// Issuer = issuer,
// Expiration = Blockchain.Default.Height + 1 + 2000000,
// IsFrozen = false
//});
//stack.PushObject(asset);
return(true);
}
protected virtual bool Runtime_Log(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
var message = Encoding.UTF8.GetString(ctx.EvaluationStack.PopByteArray());
_interopService.RaiseOnLog(new LogEventArgs(ctx.ScriptHash.ToArray(), message));
return(true);
}
protected virtual bool Runtime_Notify(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
var state = ctx.EvaluationStack.PopObject <StackItemBase>();
_interopService.RaiseOnNotify(new NotifyEventArgs(ctx.ScriptHash.ToArray(), state));
return(true);
}
protected virtual bool Storage_GetReadOnlyContext(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
ctx.EvaluationStack.PushObject(new StorageContext
{
ScriptHash = new UInt160(ctx.ScriptHash),
IsReadOnly = true
});
return(true);
}
private bool Runtime_Deserialize(ExecutionEngineBase engine)
{
var context = engine.CurrentContext;
{
if (context == null)
{
return(false);
}
if (!context.EvaluationStack.TryPop(out StackItemBase it))
{
return(false);
}
var data = it.ToByteArray();
it.Dispose();
using (MemoryStream ms = new MemoryStream(data, false))
using (BinaryReader reader = new BinaryReader(ms))
{
StackItemBase item = null;
try
{
item = DeserializeStackItem(engine, reader);
}
catch
{
if (item != null)
{
item.Dispose();
}
return(false);
}
context.EvaluationStack.Push(item);
if (item != null)
{
item.Dispose();
}
}
}
return(true);
}
private bool Runtime_Serialize(ExecutionEngineBase engine)
{
var context = engine.CurrentContext;
{
if (context == null)
{
return(false);
}
if (!context.EvaluationStack.TryPop(out StackItemBase it))
{
return(false);
}
using (it)
{
using (MemoryStream ms = new MemoryStream())
using (BinaryWriter writer = new BinaryWriter(ms))
{
try
{
SerializeStackItem(it, writer);
}
catch
{
return(false);
}
writer.Flush();
using (var bi = engine.CreateByteArray(ms.ToArray()))
context.EvaluationStack.Push(bi);
}
}
}
return(true);
}
/// <summary>
/// Check if the engine is clean
/// </summary>
/// <param name="engine">Engine</param>
/// <param name="invocationStack">True for Check invocationStack</param>
protected void CheckClean(ExecutionEngineBase engine, bool invocationStack = true)
{
Assert.AreEqual(0, engine.ResultStack.Count);
if (invocationStack)
{
Assert.AreEqual(0, engine.InvocationStack.Count);
}
else
{
var current = engine.CurrentContext;
if (current == null)
{
Assert.AreEqual(EVMState.Halt, engine.State);
}
else
{
Assert.AreEqual(0, current.EvaluationStack.Count);
Assert.AreEqual(0, current.AltStack.Count);
}
}
}
bool Storage_GetContext(ExecutionEngineBase engine)
{
var context = engine.CurrentContext;
{
if (context == null)
{
return(false);
}
var id = context.ScriptHash.ToHexString();
if (!Storages.TryGetValue(id, out DummyStorageContext stContext))
{
stContext = new DummyStorageContext(id, context.ScriptHash);
Storages[stContext.Id] = stContext;
}
using (var i = engine.CreateInterop(stContext))
context.EvaluationStack.Push(i);
}
return(true);
}
bool Storage_Get(ExecutionEngineBase engine)
{
var context = engine.CurrentContext;
{
if (context == null)
{
return(false);
}
if (!context.EvaluationStack.TryPop(out InteropStackItemBase <DummyStorageContext> inter))
{
return(false);
}
using (inter)
{
if (!(inter.Value is DummyStorageContext stContext))
{
return(false);
}
if (!context.EvaluationStack.TryPop(out StackItemBase it))
{
return(false);
}
using (it)
{
var key = it.ToByteArray();
if (key == null)
{
return(false);
}
if (stContext.Storage.TryGetValue(key.ToHexString(), out byte[] value))
protected bool CheckWitness(ExecutionEngineBase engine, ECPoint pubkey)
{
// TODO: Contract.CreateSignatureRedeemScript?
//return CheckWitness(engine, Contract.CreateSignatureRedeemScript(pubkey).ToScriptHash());
return(true);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="engine">Execution Engine</param>
/// <param name="service">Base Service</param>
public InteropServiceAdapter(ExecutionEngineBase engine, InteropService service)
{
_service = service;
_engine = engine;
}
public InvocationProcess(ExecutionEngineBase executionEngine)
{
_executionEngine = executionEngine;
}
private bool Contract_Create(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
var stack = ctx.EvaluationStack;
var script = stack.PopByteArray();
if (script.Length > 1024 * 1024)
{
return(false);
}
var parameters = stack.PopByteArray().Select(p => (ContractParameterType)p).ToArray();
if (parameters.Length > 252)
{
return(false);
}
// TODO: PopBigInteger to byte?
var returnType = (ContractParameterType)(byte)stack.PopBigInteger();
var metadata = (ContractMetadata)(byte)stack.PopBigInteger();
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var name = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var version = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var author = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var email = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 65536)
{
return(false);
}
var description = Encoding.UTF8.GetString(stack.PopByteArray());
var scriptHash = script.ToScriptHash();
var contract = _contracts.TryGet(scriptHash);
if (contract == null)
{
contract = new Contract
{
Code = new Code
{
Script = script,
ScriptHash = scriptHash,
Parameters = parameters,
ReturnType = returnType,
Metadata = metadata
},
Name = name,
Version = version,
Author = author,
Email = email,
Description = description
};
_contracts.Add(scriptHash, contract);
_contractsCreated.Add(scriptHash, new UInt160(engine.CurrentContext.ScriptHash));
}
stack.PushObject(contract);
return(true);
}
private bool Contract_Migrate(ExecutionEngineBase engine)
{
var ctx = engine.CurrentContext;
if (ctx == null)
{
return(false);
}
var stack = ctx.EvaluationStack;
var script = stack.PopByteArray();
if (script.Length > 1024 * 1024)
{
return(false);
}
var parameters = stack.PopByteArray().Select(p => (ContractParameterType)p).ToArray();
if (parameters.Length > 252)
{
return(false);
}
var returnType = (ContractParameterType)(byte)stack.PopBigInteger();
var metadata = (ContractMetadata)(byte)stack.PopBigInteger();
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var name = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var version = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var author = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 252)
{
return(false);
}
var email = Encoding.UTF8.GetString(stack.PopByteArray());
if (stack.PeekByteArray().Length > 65536)
{
return(false);
}
var description = Encoding.UTF8.GetString(stack.PopByteArray());
var scriptHash = script.ToScriptHash();
var contract = _contracts.TryGet(scriptHash);
if (contract == null)
{
contract = new Contract
{
Code = new Code
{
Script = script,
ScriptHash = scriptHash,
Parameters = parameters,
ReturnType = returnType,
Metadata = metadata
},
Name = name,
Version = version,
Author = author,
Email = email,
Description = description
};
_contracts.Add(scriptHash, contract);
_contractsCreated.Add(scriptHash, new UInt160(engine.CurrentContext.ScriptHash));
if (contract.HasStorage)
{
foreach (var pair in _storages.Find(engine.CurrentContext.ScriptHash).ToArray())
{
_storages.Add(new StorageKey
{
ScriptHash = scriptHash,
Key = pair.Key.Key
}, new StorageValue
{
Value = pair.Value.Value
});
}
}
}
stack.PushObject(contract);
return(Contract_Destroy(engine));
}
