Not long after moving the Austin Time Exchange to Ruby on Rails, we started receiving requests for a groups feature since some local groups were interested in having their own currency but did not want to run their own instance of the software and their members were already on the existing system.

Since we’re a fork of insoshi, merging the groups feature from another fork is easy. Add some code to make simple payments per-group…Boom! Done.

[youtube http://www.youtube.com/watch?v=uiakCvGXMZQ&hl=en&fs=1&]

Here’s another OpenTransact demo. Last time, Nubux, a simple reference implementation, was the financial service provider. This time, OsCurrency is the FSP.

Comments

Author: Guillaume Lebleu

Date: 2009-07-27 23:05:53

Great Tom. Was wondering where the translation from “credits” to hours happens? If I remember correctly the OpenTransact spec, you post to a currency-specific URI. Do you have a /hours for OSCurrency?

Author: herestomwiththeweather

Date: 2009-07-28 02:44:24

That's right. Assuming the FSP site only has one kind of asset type, then it can just use /transacts (spec draft) like the demo did. However, in reality, demo.opensourcecurrency.org allows members to create their own currencies so i need to make friendly urls for each currency.

[youtube http://www.youtube.com/watch?v=VvlPTPUhHGU&hl=en&fs=1&]

There’s been some good discussion on the Agile Banking list which includes simple web payments. This is like what we did on the previous screencast but simpler (mostly because we’re not using oauth).

The use of the callback to confirm the payment can be trouble. The callback could timeout or maybe the merchant is inside a firewall for some reason and can’t be contacted from outside the firewall. In either case, If I’m selling pizzas, I’m not going to make the pizza if I don’t get the callback.