State format (ach_state.json):
- Replace event_count with downloaded_keys (set of hex strings) + max_downloaded_key
- Key-based tracking correctly handles delete-then-re-record: after device erase the
count drops to 0, but new events have new (or recycled) keys
Browse pre-check:
- list_event_keys() walk before get_events() to bail early when nothing is new
- get_events() called with skip_waveform_for_keys= for already-seen keys, so repeat
call-homes only download waveforms for genuinely new events
--clear-after-download flag:
- After saving new events, calls client.delete_all_events() (0xA3→0x1C→0x06→0xA2)
- On success: resets downloaded_keys=[] and max_downloaded_key="00000000" so the
next session starts fresh (device counter resets to 0x01110000 after erase)
Post-erase key-reuse detection:
- Device counter resets to 0x01110000 after any erase; new events reuse old keys
- If max(device_keys) < max_downloaded_key, the device was wiped externally
(Blastware, manual) — seen_keys is discarded and all device keys treated as new
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
claude
09788b931a