private void Success(TransactionSubmission submission, List <TransactionSubmission> removeds)
        {
            removeds.Add(submission);
            nbSuccess++;
            var elapsed = DateTime.Now - submission.SubmissionTime;

            OnSuccess.Call(submission.Signed, elapsed);
        }
 private void Failure(TransactionSubmission submission, List <TransactionSubmission> removeds)
 {
     removeds.Add(submission);
     nbFailure++;
 }