private static IEnumerable <FilterLog> FilterLogsInBlockLowMemoryAllocation(LogFilter filter, ref ReceiptsIterator iterator)
{
List <FilterLog> logList = null;
using (iterator)
{
long logIndexInBlock = 0;
while (iterator.TryGetNext(out var receipt))
{
LogEntriesIterator logsIterator = receipt.Logs == null ? new LogEntriesIterator(receipt.LogsRlp) : new LogEntriesIterator(receipt.Logs);
if (filter.Matches(ref receipt.Bloom))
{
while (logsIterator.TryGetNext(out var log))
{
if (filter.Accepts(ref log))
{
logList ??= new List <FilterLog>();
Keccak[] topics = log.Topics;
if (topics == null)
{
var topicsValueDecoderContext = new Rlp.ValueDecoderContext(log.TopicsRlp);
topics = KeccakDecoder.Instance.DecodeArray(ref topicsValueDecoderContext);
}
logList.Add(new FilterLog(
logIndexInBlock,
logsIterator.Index,
receipt.BlockNumber,
receipt.BlockHash.ToKeccak(),
receipt.Index,
receipt.TxHash.ToKeccak(),
log.LoggersAddress.ToAddress(),
log.Data.ToArray(),
topics));
}
logIndexInBlock++;
}
}
else
{
while (logsIterator.TrySkipNext())
{
logIndexInBlock++;
}
}
}
}
return(logList ?? (IEnumerable <FilterLog>)Array.Empty <FilterLog>());
}
public bool TryGetReceiptsIterator(long blockNumber, Keccak blockHash, out ReceiptsIterator iterator) => _outStorage.TryGetReceiptsIterator(blockNumber, blockHash, out iterator);