private static bool Contract_Call(ApplicationEngine engine)
{
StackItem contractOrHash = engine.CurrentContext.EvaluationStack.Pop();
ContractState contract;
if (contractOrHash is InteropInterface <ContractState> _interface)
{
contract = _interface;
}
else
{
contract = engine.Snapshot.Contracts.TryGet(new UInt160(contractOrHash.GetByteArray()));
}
if (contract is null)
{
return(false);
}
StackItem method = engine.CurrentContext.EvaluationStack.Pop();
StackItem args = engine.CurrentContext.EvaluationStack.Pop();
ContractManifest currentManifest = engine.Snapshot.Contracts.TryGet(engine.CurrentScriptHash)?.Manifest;
if (currentManifest != null && !currentManifest.CanCall(contract.Manifest, method.GetString()))
{
return(false);
}
ExecutionContext context_new = engine.LoadScript(contract.Script, 1);
context_new.EvaluationStack.Push(args);
context_new.EvaluationStack.Push(method);
return(true);
}
public MethodCallback(ApplicationEngine engine, UInt160 hash, string method)
: base(ApplicationEngine.System_Contract_Call, false)
{
if (method.StartsWith('_'))
{
throw new ArgumentException();
}
this.contract = engine.Snapshot.Contracts[hash];
ContractManifest currentManifest = engine.Snapshot.Contracts.TryGet(engine.CurrentScriptHash)?.Manifest;
if (currentManifest != null && !currentManifest.CanCall(this.contract.Manifest, method))
{
throw new InvalidOperationException();
}
this.method = this.contract.Manifest.Abi.Methods.First(p => p.Name == method);
}