protected virtual bool Asset_GetAssetType(ExecutionEngine engine)
{
AssetState asset = engine.EvaluationStack.Pop().GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push((int)asset.AssetType);
return(true);
}
protected virtual bool Asset_GetIssuer(ExecutionEngine engine)
{
AssetState asset = engine.EvaluationStack.Pop().GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push(asset.Issuer.ToArray());
return(true);
}
protected virtual bool Asset_GetOwner(ExecutionEngine engine)
{
AssetState asset = engine.EvaluationStack.Pop().GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push(asset.Owner.EncodePoint(true));
return(true);
}
protected virtual bool Asset_GetAvailable(ExecutionEngine engine)
{
AssetState asset = engine.EvaluationStack.Pop().GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push(asset.Available.GetData());
return(true);
}
protected virtual bool Asset_GetAdmin(ExecutionEngine engine)
{
AssetState asset = (engine.EvaluationStack.Pop() as VM.Types.InteropInterface).GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push(asset.Admin.ToArray());
return(true);
}
protected virtual bool Asset_GetPrecision(ExecutionEngine engine)
{
AssetState asset = (engine.EvaluationStack.Pop() as VM.Types.InteropInterface).GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push((int)asset.Precision);
return(true);
}
protected override bool Blockchain_GetAsset(ExecutionEngine engine)
{
UInt256 hash = new UInt256(engine.EvaluationStack.Pop().GetByteArray());
AssetState asset = assets.TryGet(hash);
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push(StackItem.FromInterface(asset));
return(true);
}
private bool Blockchain_GetAsset(ExecutionEngine engine)
{
UInt256 hash = new UInt256(engine.CurrentContext.EvaluationStack.Pop().GetByteArray());
AssetState asset = Snapshot.Assets.TryGet(hash);
if (asset == null)
{
return(false);
}
engine.CurrentContext.EvaluationStack.Push(StackItem.FromInterface(asset));
return(true);
}
private bool Asset_GetIssuer(ExecutionEngine engine)
{
if (engine.CurrentContext.EvaluationStack.Pop() is InteropInterface _interface)
{
AssetState asset = _interface.GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.CurrentContext.EvaluationStack.Push(asset.Issuer.ToArray());
return(true);
}
return(false);
}
private bool Asset_GetPrecision(ExecutionEngine engine)
{
if (engine.CurrentContext.EvaluationStack.Pop() is InteropInterface _interface)
{
AssetState asset = _interface.GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.CurrentContext.EvaluationStack.Push((int)asset.Precision);
return(true);
}
return(false);
}
protected virtual bool Asset_GetAmount(ExecutionEngine engine)
{
if (engine.EvaluationStack.Pop() is InteropInterface _interface)
{
AssetState asset = _interface.GetInterface <AssetState>();
if (asset == null)
{
return(false);
}
engine.EvaluationStack.Push(asset.Amount.GetData());
return(true);
}
return(false);
}
private bool Asset_Create(ExecutionEngine engine)
{
InvocationTransaction tx = (InvocationTransaction)engine.ScriptContainer;
AssetType asset_type = (AssetType)(byte)engine.EvaluationStack.Pop().GetBigInteger();
if (!Enum.IsDefined(typeof(AssetType), asset_type) || asset_type == AssetType.CreditFlag || asset_type == AssetType.DutyFlag || asset_type == AssetType.GoverningToken || asset_type == AssetType.UtilityToken)
{
return(false);
}
if (engine.EvaluationStack.Peek().GetByteArray().Length > 1024)
{
return(false);
}
string name = Encoding.UTF8.GetString(engine.EvaluationStack.Pop().GetByteArray());
Fixed8 amount = new Fixed8((long)engine.EvaluationStack.Pop().GetBigInteger());
if (amount == Fixed8.Zero || amount < -Fixed8.Satoshi)
{
return(false);
}
if (asset_type == AssetType.Invoice && amount != -Fixed8.Satoshi)
{
return(false);
}
byte precision = (byte)engine.EvaluationStack.Pop().GetBigInteger();
if (precision > 8)
{
return(false);
}
if (asset_type == 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(engine.EvaluationStack.Pop().GetByteArray(), ECCurve.Secp256r1);
if (owner.IsInfinity)
{
return(false);
}
if (!CheckWitness(engine, owner))
{
return(false);
}
UInt160 admin = new UInt160(engine.EvaluationStack.Pop().GetByteArray());
UInt160 issuer = new UInt160(engine.EvaluationStack.Pop().GetByteArray());
AssetState asset = assets.GetOrAdd(tx.Hash, () => new AssetState
{
AssetId = tx.Hash,
AssetType = asset_type,
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
});
engine.EvaluationStack.Push(StackItem.FromInterface(asset));
return(true);
}
