On Mar 12, 2014, at 7:15 PM, Max Leske <maxleske@gmail.com> wrote:To answer my own question (RTFM�):"This is a credit card processing library. I needed this for airflowing an application from flowing.�Where �airflowing� and �flowing� link to http://airflowing.com/ and http://flowingconcept.com/ respectively.On 12.03.2014, at 23:12, Max Leske <maxleske@gmail.com> wrote:Thanks Sebastian, very cool!Do you use it in production, or know of anyone who does? We might want to use it too.Forgot to mention that before doing it, I did took a look at ActiveMerchant which seems to be what Shopify uses:But yeah, that�s right. We use it in airflowingAlso in flowing�s invoice system for the consulting services we also do :DAll over https and never saving credit cards info (only the gateway�s token of the authorised cards, the sensible data only touches RAM and gets a nice nil on the instVar after the gateway's result)We could authorise and capture on debit cards too but the gateway we�re using has debit only for brazilian cards and doesn�t provide the international debit feature (which seems to be kind of a big deal for vendors and banks)Let me know if you want to extend its API to your gateway, just push the merge requests.Here... this is how our invoice system looks:<flowingInvoice.png>