Decoding Parallax payloads

Pipeline

1. Base64-decode payload.
2. Parse bytes as protobuf (schema depends on rvm).
3. Optionally correlate with Legacy GetVehicleState JSON for field names and units.

No public .proto files exist. Recover schemas from decompiled generated classes (k70, l70, g70, f70, n70, …).

Quick inspection

echo '<payload-b64>' | base64 -d | protoc --decode_raw

APK decode entry points

File	Role
cm/c.smali	RVM enum + parseRvmData() for most topics
cq/f.smali	Extra decoders (charging.session.status → f70/v, energy.high_voltage.battery_state → l70/p, …)
cm/b.smali	Enum → handler mapping

Money submessages

Session cost and similar fields use tk/b:

Field	Type
currencyCode	string (e.g. USD)
units	int64 major units
nanos	int32 fractional nanos

Workflow for building .proto files

1. Read FIELD_NUMBER lines from the APK class for that RVM.
2. Capture samples via subscription script or MITM.
3. Validate with protoc --decode_raw and domain pages under Domains.
4. Snapshot GetVehicleState at the same time to label enums and floats.

Domain pages document known message types per RVM.