private StackItem UnregisterCandidate(ApplicationEngine engine, Array args)
{
ECPoint pubkey = args[0].GetSpan().AsSerializable <ECPoint>();
if (!engine.CheckWitnessInternal(Contract.CreateSignatureRedeemScript(pubkey).ToScriptHash()))
{
return(false);
}
return(UnregisterCandidate(engine.Snapshot, pubkey));
}
protected internal void RuntimeLog(byte[] state)
{
if (state.Length > MaxNotificationSize)
{
throw new ArgumentException();
}
string message = Utility.StrictUTF8.GetString(state);
Log?.Invoke(this, new LogEventArgs(ScriptContainer, CurrentScriptHash, message));
}
public void TestEnumerator_Next()
{
var engine = GetEngine();
var arr = new VMArray {
new byte[] { 0x01 },
new byte[] { 0x02 }
};
engine.EnumeratorNext(new ArrayWrapper(arr)).Should().BeTrue();
}
protected internal IIterator CreateIterator(StackItem item)
{
return(item switch
{
Array array => new ArrayWrapper(array),
Map map => new MapWrapper(map, ReferenceCounter),
VM.Types.Buffer buffer => new ByteArrayWrapper(buffer),
PrimitiveType primitive => new ByteArrayWrapper(primitive),
_ => throw new ArgumentException()
});
void IInteroperable.FromStackItem(StackItem stackItem)
{
Array array = (Array)stackItem;
Id = (int)array[0].GetInteger();
UpdateCounter = (ushort)array[1].GetInteger();
Hash = new UInt160(array[2].GetSpan());
Nef = array[3].GetSpan().AsSerializable <NefFile>();
Manifest = array[4].ToInteroperable <ContractManifest>();
}
public void TestIterator_Value()
{
var arr = new VMArray {
new byte[] { 0x01 },
new byte[] { 0x02 }
};
var wrapper = new ArrayWrapper(arr);
wrapper.Next();
ApplicationEngine.IteratorValue(wrapper).GetSpan().ToHexString().Should().Be(new byte[] { 0x01 }.ToHexString());
}
private StackItem Vote(ApplicationEngine engine, Array args)
{
UInt160 account = new UInt160(args[0].GetSpan());
ECPoint voteTo = args[1].IsNull ? null : args[1].GetSpan().AsSerializable <ECPoint>();
if (!engine.CheckWitnessInternal(account))
{
return(false);
}
return(Vote(engine.Snapshot, account, voteTo));
}
private static (BigInteger numerator, BigInteger denominator) Fraction(decimal d)
{
int[] bits = decimal.GetBits(d);
BigInteger numerator = (1 - ((bits[3] >> 30) & 2)) *
unchecked (((BigInteger)(uint)bits[2] << 64) |
((BigInteger)(uint)bits[1] << 32) |
(uint)bits[0]);
BigInteger denominator = BigInteger.Pow(10, (bits[3] >> 16) & 0xff);
return(numerator, denominator);
}
/// <summary>
/// The implementation of System.Runtime.CheckWitness.
/// Determines whether the specified account has witnessed the current transaction.
/// </summary>
/// <param name="hashOrPubkey">The hash or public key of the account.</param>
/// <returns><see langword="true"/> if the account has witnessed the current transaction; otherwise, <see langword="false"/>.</returns>
protected internal bool CheckWitness(byte[] hashOrPubkey)
{
UInt160 hash = hashOrPubkey.Length switch
{
20 => new UInt160(hashOrPubkey),
33 => Contract.CreateSignatureRedeemScript(ECPoint.DecodePoint(hashOrPubkey, ECCurve.Secp256r1)).ToScriptHash(),
_ => throw new ArgumentException(null, nameof(hashOrPubkey))
};
return(CheckWitnessInternal(hash));
}
private StackItem Vote(ApplicationEngine engine, VMArray args)
{
UInt160 account = new UInt160(args[0].GetByteArray());
ECPoint[] pubkeys = ((VMArray)args[1]).Select(p => p.GetByteArray().AsSerializable <ECPoint>()).ToArray();
if (!InteropService.CheckWitness(engine, account))
{
return(false);
}
StorageKey key_account = CreateAccountKey(account);
if (engine.Snapshot.Storages.TryGet(key_account) is null)
{
return(false);
}
StorageItem storage_account = engine.Snapshot.Storages.GetAndChange(key_account);
AccountState state_account = new AccountState(storage_account.Value);
foreach (ECPoint pubkey in state_account.Votes)
{
StorageItem storage_validator = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_Validator, pubkey.ToArray()));
ValidatorState state_validator = ValidatorState.FromByteArray(storage_validator.Value);
state_validator.Votes -= state_account.Balance;
storage_validator.Value = state_validator.ToByteArray();
}
pubkeys = pubkeys.Distinct().Where(p => engine.Snapshot.Storages.TryGet(CreateStorageKey(Prefix_Validator, p.ToArray())) != null).ToArray();
if (pubkeys.Length != state_account.Votes.Length)
{
StorageItem storage_count = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_ValidatorsCount), () => new StorageItem
{
Value = new ValidatorsCountState().ToByteArray()
});
ValidatorsCountState state_count = ValidatorsCountState.FromByteArray(storage_count.Value);
if (state_account.Votes.Length > 0)
{
state_count.Votes[state_account.Votes.Length - 1] -= state_account.Balance;
}
if (pubkeys.Length > 0)
{
state_count.Votes[pubkeys.Length - 1] += state_account.Balance;
}
storage_count.Value = state_count.ToByteArray();
}
state_account.Votes = pubkeys;
storage_account.Value = state_account.ToByteArray();
foreach (ECPoint pubkey in state_account.Votes)
{
StorageItem storage_validator = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_Validator, pubkey.ToArray()));
ValidatorState state_validator = ValidatorState.FromByteArray(storage_validator.Value);
state_validator.Votes += state_account.Balance;
storage_validator.Value = state_validator.ToByteArray();
}
return(true);
}
/// <summary>
/// The implementation of System.Runtime.Notify.
/// Sends a notification.
/// </summary>
/// <param name="eventName">The name of the event.</param>
/// <param name="state">The arguments of the event.</param>
protected internal void RuntimeNotify(byte[] eventName, Array state)
{
if (eventName.Length > MaxEventName)
{
throw new ArgumentException(null, nameof(eventName));
}
using MemoryStream ms = new(MaxNotificationSize);
using BinaryWriter writer = new(ms, Utility.StrictUTF8, true);
BinarySerializer.Serialize(writer, state, MaxNotificationSize);
SendNotification(CurrentScriptHash, Utility.StrictUTF8.GetString(eventName), state);
}
public void TestIterator_Key()
{
var engine = GetEngine();
var arr = new VMArray {
new byte[] { 0x01 },
new byte[] { 0x02 }
};
var wrapper = new ArrayWrapper(arr);
wrapper.Next();
engine.IteratorKey(wrapper).GetInteger().Should().Be(0);
}
public void TestEnumerator_Value()
{
var engine = GetEngine();
var arr = new VMArray {
new byte[] { 0x01 },
new byte[] { 0x02 }
};
var wrapper = new ArrayWrapper(arr);
wrapper.Next();
engine.EnumeratorValue(wrapper).GetSpan().ToHexString().Should().Be(new byte[] { 0x01 }.ToHexString());
}
public void TestEnumerator_Create()
{
var engine = GetEngine();
var arr = new VMArray {
new byte[] { 0x01 },
new byte[] { 0x02 }
};
var ret = engine.CreateEnumerator(arr);
ret.Next();
ret.Value().GetSpan().ToHexString().Should().Be(new byte[] { 0x01 }.ToHexString());
}
private StackItem SetFeePerByte(ApplicationEngine engine, Array args)
{
if (!CheckValidators(engine))
{
return(false);
}
long value = (long)args[0].GetBigInteger();
StorageItem storage = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_FeePerByte));
storage.Value = BitConverter.GetBytes(value);
return(true);
}
protected internal void InvokeCallback(CallbackBase callback, Array args)
{
if (args.Count != callback.ParametersCount)
{
throw new InvalidOperationException();
}
callback.LoadContext(this, args);
if (callback is SyscallCallback syscallCallback)
{
OnSysCall(syscallCallback.Method);
}
}
public void FromStackItem(StackItem stackItem)
{
Array array = (Array)stackItem;
OriginalTxid = new UInt256(array[0].GetSpan());
GasForResponse = (long)array[1].GetInteger();
Url = array[2].GetString();
Filter = array[3].GetString();
CallbackContract = new UInt160(array[4].GetSpan());
CallbackMethod = array[5].GetString();
UserData = array[6].GetSpan().ToArray();
}
protected StorageKey CreateStorageKey(byte prefix, byte[] key = null)
{
StorageKey storageKey = new StorageKey
{
Id = Id,
Key = new byte[sizeof(byte) + (key?.Length ?? 0)]
};
storageKey.Key[0] = prefix;
key?.CopyTo(storageKey.Key.AsSpan(1));
return(storageKey);
}
private StackItem SetMaxTransactionsPerBlock(ApplicationEngine engine, Array args)
{
if (!CheckValidators(engine))
{
return(false);
}
uint value = (uint)args[0].GetBigInteger();
StorageItem storage = engine.Snapshot.Storages.GetAndChange(CreateStorageKey(Prefix_MaxTransactionsPerBlock));
storage.Value = BitConverter.GetBytes(value);
return(true);
}
public void TestIterator_Keys()
{
var engine = GetEngine();
var arr = new VMArray {
new byte[] { 0x01 },
new byte[] { 0x02 }
};
var wrapper = new ArrayWrapper(arr);
var ret = engine.IteratorKeys(wrapper);
ret.Next();
ret.Value().GetBigInteger().Should().Be(0);
}
public void AddTransferNotification(ExecutionEngine engine, UIntBase assetId, UInt160 from, UInt160 to, Fixed8 value)
{
VMArray array = new VMArray();
array.Add("transfer");
array.Add(new ByteArray(from.ToArray()));
array.Add(new ByteArray(to.ToArray()));
array.Add(new ByteArray(new BigInteger(value.GetData()).ToByteArray()));
NotifyEventArgs notification = new NotifyEventArgs(engine.ScriptContainer, assetId, array);
InvokeNotification(notification);
}
public void TestOnPersistWithArgs()
{
var snapshot = Blockchain.Singleton.GetSnapshot();
ApplicationEngine engine1 = new ApplicationEngine(TriggerType.Application, null, snapshot, 0);
VMArray args = new VMArray();
VM.Types.Boolean result1 = new VM.Types.Boolean(false);
testNativeContract.TestOnPersist(engine1, args).Should().Be(result1);
ApplicationEngine engine2 = new ApplicationEngine(TriggerType.System, null, snapshot, 0);
VM.Types.Boolean result2 = new VM.Types.Boolean(true);
testNativeContract.TestOnPersist(engine2, args).Should().Be(result2);
}
public static StackItem StackItemFromJson(JObject json)
{
StackItemType type = json["type"].TryGetEnum <StackItemType>();
switch (type)
{
case StackItemType.Boolean:
return(new Boolean(json["value"].AsBoolean()));
case StackItemType.Buffer:
return(new Buffer(Convert.FromBase64String(json["value"].AsString())));
case StackItemType.ByteString:
return(new ByteString(Convert.FromBase64String(json["value"].AsString())));
case StackItemType.Integer:
return(new Integer(new BigInteger(json["value"].AsNumber())));
case StackItemType.Array:
Array array = new Array();
foreach (var item in (JArray)json["value"])
{
array.Add(StackItemFromJson(item));
}
return(array);
case StackItemType.Struct:
Struct @struct = new Struct();
foreach (var item in (JArray)json["value"])
{
@struct.Add(StackItemFromJson(item));
}
return(@struct);
case StackItemType.Map:
Map map = new Map();
foreach (var item in (JArray)json["value"])
{
PrimitiveType key = (PrimitiveType)StackItemFromJson(item["key"]);
map[key] = StackItemFromJson(item["value"]);
}
return(map);
case StackItemType.Pointer:
return(new Pointer(null, (int)json["value"].AsNumber()));
case StackItemType.InteropInterface:
return(new InteropInterface(new object())); // See https://github.com/neo-project/neo/blob/master/src/neo/VM/Helper.cs#L194
}
return(json["value"] is null ? StackItem.Null : json["value"].AsString());
}
public JObject GetNep17Balances(JArray _params)
{
UInt160 userScriptHash = GetScriptHashFromParam(_params[0].AsString());
JObject json = new();
JArray balances = new();
json["address"] = userScriptHash.ToAddress(_neoSystem.Settings.AddressVersion);
json["balance"] = balances;
int count = 0;
byte[] prefix = Key(Nep17BalancePrefix, userScriptHash);
foreach (var(key, value) in _db.FindPrefix <Nep17BalanceKey, TokenBalance>(prefix))
{
if (NativeContract.ContractManagement.GetContract(_neoSystem.StoreView, key.AssetScriptHash) is null)
{
continue;
}
try
{
using var script = new ScriptBuilder();
script.EmitDynamicCall(key.AssetScriptHash, "decimals");
script.EmitDynamicCall(key.AssetScriptHash, "symbol");
var engine = ApplicationEngine.Run(script.ToArray(), _neoSystem.StoreView, settings: _neoSystem.Settings);
var symbol = engine.ResultStack.Pop().GetString();
var decimals = engine.ResultStack.Pop().GetInteger();
var name = NativeContract.ContractManagement.GetContract(_neoSystem.StoreView, key.AssetScriptHash).Manifest.Name;
balances.Add(new JObject
{
["assethash"] = key.AssetScriptHash.ToString(),
["name"] = name,
["symbol"] = symbol,
["decimals"] = decimals.ToString(),
["amount"] = value.Balance.ToString(),
["lastupdatedblock"] = value.LastUpdatedBlock
});
count++;
if (count >= _maxResults)
{
break;
}
}
catch { }
}
return(json);
}
public void TestOnPersistWithArgs()
{
ApplicationEngine engine1 = new ApplicationEngine(TriggerType.Application, null, Store.GetSnapshot(), 0);
TestNativeContract testNativeContract = new TestNativeContract();
VMArray args = new VMArray();
VM.Types.Boolean result1 = new VM.Types.Boolean(false);
testNativeContract.TestOnPersist(engine1, args).Should().Be(result1);
ApplicationEngine engine2 = new ApplicationEngine(TriggerType.System, null, Store.GetSnapshot(), 0);
VM.Types.Boolean result2 = new VM.Types.Boolean(true);
testNativeContract.TestOnPersist(engine2, args).Should().Be(result2);
}
/// <summary>
/// The implementation of System.Runtime.GetNotifications.
/// Gets the notifications sent by the specified contract during the execution.
/// </summary>
/// <param name="hash">The hash of the specified contract. It can be set to <see langword="null"/> to get all notifications.</param>
/// <returns>The notifications sent during the execution.</returns>
protected internal NotifyEventArgs[] GetNotifications(UInt160 hash)
{
IEnumerable <NotifyEventArgs> notifications = Notifications;
if (hash != null) // must filter by scriptHash
{
notifications = notifications.Where(p => p.ScriptHash == hash);
}
NotifyEventArgs[] array = notifications.ToArray();
if (array.Length > Limits.MaxStackSize)
{
throw new InvalidOperationException();
}
return(array);
}
protected StorageKey CreateStorageKey(byte prefix, byte[] key = null)
{
StorageKey storageKey = new StorageKey
{
ScriptHash = Hash,
Key = new byte[sizeof(byte) + (key?.Length ?? 0)]
};
storageKey.Key[0] = prefix;
if (key != null)
{
Buffer.BlockCopy(key, 0, storageKey.Key, 1, key.Length);
}
return(storageKey);
}
/// <summary>
/// Converts the event from a JSON object.
/// </summary>
/// <param name="json">The event represented by a JSON object.</param>
/// <returns>The converted event.</returns>
public static ContractEventDescriptor FromJson(JObject json)
{
ContractEventDescriptor descriptor = new()
{
Name = json["name"].GetString(),
Parameters = ((JArray)json["parameters"]).Select(u => ContractParameterDefinition.FromJson((JObject)u)).ToArray(),
};
if (string.IsNullOrEmpty(descriptor.Name))
{
throw new FormatException();
}
_ = descriptor.Parameters.ToDictionary(p => p.Name);
return(descriptor);
}
/// <summary>
/// check script if it contains wrong Opcode
/// </summary>
/// <param name="script"></param>
/// <returns></returns>
private async Task CheckBadOpcode(byte[] script)
{
Script scriptCodes = new Script(script);
for (var i = 0; i < scriptCodes.Length;)
{
// Check bad opcodes
Instruction inst = scriptCodes.GetInstruction(i);
if (inst is null || !Enum.IsDefined(typeof(OpCode), inst.OpCode))
{
throw new FormatException($"OpCode not found at {i}-{((byte)inst.OpCode):x2}");
}
i += inst.Size;
}
}
public void TestEnumerator_Next()
{
var engine = GetEngine();
var arr = new VMArray {
new byte[] { 0x01 },
new byte[] { 0x02 }
};
engine.CurrentContext.EvaluationStack.Push(new InteropInterface <ArrayWrapper>(new ArrayWrapper(arr)));
InteropService.Invoke(engine, InteropService.Neo_Enumerator_Next).Should().BeTrue();
engine.CurrentContext.EvaluationStack.Pop().ToBoolean().Should().BeTrue();
engine.CurrentContext.EvaluationStack.Push(1);
InteropService.Invoke(engine, InteropService.Neo_Enumerator_Next).Should().BeFalse();
}