public static InvocationResult CallSystemContract(SystemContractExecutionFrame currentFrame, UInt160 contractAddress, UInt160 sender, string methodSignature, params dynamic[] values)
{
var context = currentFrame.InvocationContext.NextContext(sender);
var input = ContractEncoder.Encode(methodSignature, values);
// TODO: pass correct gas amount
return(ContractInvoker.Invoke(contractAddress, context, input, 100_000_000));
}
private OperatingError _InvokeContract(
UInt160 addressTo, byte[] input, TransactionReceipt receipt,
IBlockchainSnapshot snapshot, bool isSystemContract
)
{
var transaction = receipt.Transaction;
var context = new InvocationContext(receipt.Transaction.From, snapshot, receipt);
try
{
if (receipt.GasUsed > transaction.GasLimit)
{
return(OperatingError.OutOfGas);
}
var result = ContractInvoker.Invoke(addressTo, context, input, transaction.GasLimit - receipt.GasUsed);
receipt.GasUsed += result.GasUsed;
if (result.Status != ExecutionStatus.Ok)
{
return(OperatingError.ContractFailed);
}
if (receipt.GasUsed > transaction.GasLimit)
{
return(OperatingError.OutOfGas);
}
/* this OnSystemContractInvoked is useful for internal communication (for example - during keyGeneration) */
if (isSystemContract)
{
OnSystemContractInvoked?.Invoke(this, context);
}
return(OperatingError.Ok);
}
catch (OutOfGasException e)
{
receipt.GasUsed += e.GasUsed;
}
catch (Exception e)
{
Logger.LogWarning($"Failed contract execution: {e}");
return(OperatingError.InvalidContract);
}
return(OperatingError.OutOfGas);
}