private SignalServiceSyncMessage createSynchronizeMessage(SignalServiceEnvelope envelope, SyncMessage content) { if (content.SentOneofCase == SyncMessage.SentOneofOneofCase.Sent) { SyncMessage.Types.Sent sentContent = content.Sent; return(SignalServiceSyncMessage.forSentTranscript(new SentTranscriptMessage(sentContent.Destination, (long)sentContent.Timestamp, createSignalServiceMessage(envelope, sentContent.Message), (long)sentContent.ExpirationStartTimestamp))); } if (content.RequestOneofCase == SyncMessage.RequestOneofOneofCase.Request) { return(SignalServiceSyncMessage.forRequest(new RequestMessage(content.Request))); } if (content.Read.Count > 0) { List <ReadMessage> readMessages = new List <ReadMessage>(); foreach (SyncMessage.Types.Read read in content.Read) { readMessages.Add(new ReadMessage(read.Sender, (long)read.Timestamp)); } return(SignalServiceSyncMessage.forRead(readMessages)); } return(SignalServiceSyncMessage.empty()); }