The flow is unclear

[GildedHonour]

There's an ambiguity in the documentation and code examples. What's the correct flow?

1) Receive IPN, a) respond with "200 empty ok" right away and b) then send one more request with cmd=_notify-validate c) and then process a response if it's VERIFIED

2) Receive IPN and send a request with cmd=_notify-validate and then process a response if it's VERIFIED

[overint]

I believe the docs state that you should use respond with a 200 OK response before doing the processing on your side (if this could take a long time, as paypal may count it as a timeout and set the IPN to be retried).

AFAIK both methods are ok, but you may want to clarify with paypal tech support.

[GildedHonour]

why here https://github.com/paypal/ipn-code-samples/blob/master/ruby/paypal_ipn_rails.rb

a request is sent to

"https://ipnpb.sandbox.paypal.com/cgi-bin/webscr?cmd=_notify-validate"

instead of

"https://ipnpb.sandbox.paypal.com/cgi-bin/webscr?cmd=_notify-validate&#{original_query_string}"

?

[overint]

Some of the sample may be outdated, you are welcome to consult the docs and make a PR to correct them.

[GildedHonour]

What am I doing if not that? Why did you close the issue?

[overint]

What do you mean?

[GildedHonour]

Why did you close the issue?

[overint]

Because the original question was answered?

If you have additional issues, you can create tickets for them.

[GildedHonour]

Because the original question was answered?