topic DPM FingerPrint rules for repost after invalid credit card error in Integration and Testing

DPM FingerPrint rules for repost after invalid credit card error

evoDev — Mon, 05 Aug 2013 19:11:54 GMT

I have a question about how to handle a repost for the same transaction in DPM:

Use case is person has entered an invalid credit card (cc) number. The error comes back with the invalid cc error. User then corrects cc num and enters a valid cc hits submit. What needs to change/remain the same for a repost.

I tried reposting using the following and it works but I'm not sure if this is recommended:

login, api transkey, and amount same as previous post
fp_sequence is same as previous post
fp_timestamp is same as previous post

I also tried changing fp_sequence and fp_timestamp but I received an error saying "This transaction cannot be accepted."

Should I change the fp_timestamp and keep fp_sequence the same as previous post?

What is recommended?

Thanks.

Re: DPM FingerPrint rules for repost after invalid credit card error

RaynorC1emen7 — Mon, 05 Aug 2013 19:40:03 GMT

1)DO NOT post the transkey, you use it to generate the x_fp_hash, but do NOT post.

2)The x_fp_hash can only be use once, get a new fp_timestamp and regenerate the x_fp_hash.

Re: DPM FingerPrint rules for repost after invalid credit card error

evoDev — Mon, 05 Aug 2013 20:10:04 GMT

>get a new fp_timestamp and regenerate the x_fp_hash

Great thanks!

BTW: I am not posting TransKey, these are only elements for the Fingerprint generation. But thank you for the warning in case another reader misunderstands.