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firestar5683
40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
"""Choose a recognized CarParams snapshot for capability-gated settings.
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The current persistent snapshot may temporarily be MOCK while the car process
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starts. A matching previous route is safe for displaying an *available* toggle;
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it never enables control or changes the panda safety configuration by itself.
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"""
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from cereal import car
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def _fingerprint(raw: bytes | None) -> str:
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if not raw:
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return ""
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try:
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with car.CarParams.from_bytes(raw) as cp:
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return str(cp.carFingerprint)
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except Exception:
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return ""
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def capability_car_params_bytes(params) -> bytes | None:
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"""Prefer live/recognized params; fallback only to the exact forced model."""
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model = params.get("CarModel", encoding="utf-8") or ""
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forced = params.get_bool("ForceFingerprint")
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current_keys = ("CarParams", "CarParamsPersistent") if params.get_bool("IsOnroad") else ("CarParamsPersistent",)
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for key in current_keys:
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raw = params.get(key)
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fingerprint = _fingerprint(raw)
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if fingerprint and fingerprint != "MOCK":
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if forced and model and fingerprint != model:
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return None
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return raw
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if forced and model:
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previous = params.get("CarParamsPrevRoute")
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if _fingerprint(previous) == model:
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return previous
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return None
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