Balanced callback fails for previous exchanges that don't have routes

[rohitpaulk]

https://app.getsentry.com/gratipay/gratipay-com/group/60437761/

Stacktrace (most recent call last):

  File "site-packages/algorithm.py", line 288, in run
    new_state = function(**deps.as_kwargs)
  File "aspen/algorithms/website.py", line 104, in get_response_for_resource
    return {'response': resource.respond(state)}
  File "aspen/resources/simplate.py", line 57, in respond
    exec self.pages[1] in context
  File "/app/www/callbacks/balanced.spt", line 35, in <module>
    record_exchange_result(website.db, e_id, status, error, p)
  File "gratipay/billing/exchanges.py", line 318, in record_exchange_result
    assert route

[Changaco]

#2779 would fix that, I'm not sure it's worth it to work around the problem instead of fixing the cause.

[rohitpaulk]

Okay, I'm closing this and marking #2779 as 3 stars.

[chadwhitacre]

It looks like we have a user that is getting bitten by this:

https://gratipay.freshdesk.com/helpdesk/tickets/1867

Does it make sense to reopen and solve this instead of the underlying issue?

[chadwhitacre]

After reading more, I'll point the user to #2779.