private bool TryDecodeTransactionKId(ByteArrayPart branch, out int transactionKId)
{
int begin = branch.Begin + SipMessage.MagicCookie.Length;
int end = branch.End;
if (begin + 8 == end && HexEncoding.TryParseHex8(branch.Bytes, begin, out transactionKId) &&
Transaction.IsValidTransactionId(transactionKId))
{
transactionKId = Transaction.GetTransactionKId(trasactionKind, transactionKId);
return(true);
}
transactionKId = 0;
return(false);
}