Hi.  I'm curious how much information people generally store regarding credit card transactions.  For example, when I process a payment, I do the following:

- update the user's account balance record accordingly

- insert the individual transaction info in a 'transactions' table 

For the individual transaction record, I store

- user_id

- amount

- (authnet) transId

- timestamp

Is the transID alone enough? Or is it better to store the entire xml response? Or something in between?

(I've found several posts that touch on this subject but I haven't seen this exact question addressed.)