public void StartOperation(int depth, long gas, Instruction opcode, int pc)
{
_cancellationToken.ThrowIfCancellationRequested();
var previousTraceEntry = _traceEntry;
_traceEntry = new GethTxTraceEntry();
_traceEntry.Pc = pc;
_traceEntry.Operation = Enum.GetName(typeof(Instruction), opcode);
_traceEntry.Gas = gas;
_traceEntry.Depth = depth;
_trace.Entries.Add(_traceEntry);
if (_traceEntry.Depth > (previousTraceEntry?.Depth ?? 0))
{
_traceEntry.Storage = new Dictionary <string, string>();
_trace.StoragesByDepth.Push(previousTraceEntry != null ? previousTraceEntry.Storage : new Dictionary <string, string>());
}
else if (_traceEntry.Depth < (previousTraceEntry?.Depth ?? 0))
{
if (previousTraceEntry == null)
{
throw new InvalidOperationException("Unexpected missing previous trace when leaving a call.");
}
_traceEntry.Storage = new Dictionary <string, string>(_trace.StoragesByDepth.Pop());
}
else
{
if (previousTraceEntry == null)
{
throw new InvalidOperationException("Unexpected missing previous trace on continuation.");
}
_traceEntry.Storage = new Dictionary <string, string>(previousTraceEntry.Storage);
}
}
