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Re: [Taler] WebEx wallet can't POST on Django site

From: Marcello Stanisci
Subject: Re: [Taler] WebEx wallet can't POST on Django site
Date: Thu, 4 Feb 2016 22:10:58 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

> Maybe the bank's confirmation/fulfillment page from the final POST of
> the frontend is supposed to trigger a signal, telling the backend that
> all went well?  I mean, after the POST there has to be another page
> returned from the bank anyway, so having another tiny interaction with
> the wallet to flip a bit (without showing in the UX) seems fine there.
Yes, it's a solution that comes 'for free'.

> > One question remains:  What happens if, after create-reserve, the user
> > fails to enter the right PIN?  Will the reserve be marked as "failed"
> > (maybe by a DOM event from the bank)?  Will it expire?  What's the UX?

Recording the reserve would require more "staus flags" associated with
reserves, so more db work. And generating a new key pair when the user wants
to create a new reserve doesn't decrease sensibly the performance. And from
the UX perspective, I would suggest a "Reserve creation failed" message to
show to the user, and then he just restart the process.

The failure of course could occur after two/three attempts so the user
shouldn't be that annoyed to retry the whole thing (since he has been
quite careless!).


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