} else {
m_hasVersion2FormatChunks = false;
}
int numJSONBytes = fd.readInt();
byte jsonBytes[] = new byte[numJSONBytes];
fd.readFully(jsonBytes);
String jsonString = new String(jsonBytes, "UTF-8");
JSONObject obj = new JSONObject(jsonString);
m_txnId = obj.getLong("txnId");
//Timestamp field added for 3.0, might not be there