from dynalab_core.protocols.packets.data import ValueDescriptor
from dynalab_core.protocols.packets.handshake import SignalDescriptor


def process(
    a: ValueDescriptor, b: ValueDescriptor, r: SignalDescriptor
) -> ValueDescriptor:
    val = ValueDescriptor(
        signal_id=r.id, value=a.value * b.value, timestamp=max(a.timestamp, b.timestamp)
    )
    return val