I think this nonce calculator works but is technically incorrect

[wz2b]

meshtastic-python-scripts/mqtt-script.py

Line 22 in 63f53ea

nonce = getattr(mp, "id").to_bytes(8, "little") + getattr(mp, "from").to_bytes(8, "little")

I think this code:

nonce = getattr(mp, "id").to_bytes(8, "little") + getattr(mp, "from").to_bytes(8, "little")
should actually be:

nonce = getattr(mp, "id").to_bytes(8, "little") + getattr(mp, "from").to_bytes(4, "little") + (0).to_bytes(4, "little")

It's a subtle issue, and in a practical sense it makes no difference because the firmware always sets extraNonce to zero and because it's little endien. But I was referred to this code as a reference ("this is how you do it") so I think if this is serving as an example that it should reflect the correct reading of the nonce calculation, which I believe is:

[ 64 bits of packet id ] [ 32 bits of from ] [ 32 bits of extra nonce which is by default all zeros ]

This is related to my squawk in the firmware, which I also think has an issue:

meshtastic/firmware#6424