you need to add your new module logging.py to shared/manifest.py (or shared/manifest_mk4). Simulator does not need this as it loads contents directly from shared dir. When building for real thing all modules have to be included in manifest. Your code is failing in flow.py:22 where it attempts to import from hsm.py module. In hsm.py it fails because it cannot find module logging.py as it is not included in manifest.

Thanks, very helpful! I'll try again and try to come up with something cleaner

Now it works on the real thing. Here's a summary of the changes made so far:

• Now AuditLogger is instantiated as soon as we start parsing the psbt file and passed to approve_transaction as an argument. I originally thought I could keep the AuditLogger in the approve_transaction part and just add another one higher in auth.py as to make the less change possible to the way things were, but it appeared that having 2 loggers inside each other writing to the same card was not possible on the real cc (no issue with the simulator though).
• Instead of having a psbt dir with as many log files as psbt submitted, there's now a log dir with one file for each hsm policy ('00'*32 being no hsm mode) logging each signing attempt.
• I assumed it was possible to log to card while not being in hsm mode, but maybe it shouldn't be possible idk.
• I started working on the previous release on top of some unrelated changes I was experimenting with and that were the reason I wanted more detailed logs, so I still need to rebase it on the latest release.

Please let me know if you think this is going in the right direction.