Function polkadot_node_subsystem_util::runtime::check_signature

pub fn check_signature<Payload, RealPayload>(
    session_index: SessionIndex,
    session_info: &SessionInfo,
    relay_parent: Hash,
    signed: UncheckedSigned<Payload, RealPayload>
) -> Result<Signed<Payload, RealPayload>, UncheckedSigned<Payload, RealPayload>>where
    Payload: EncodeAs<RealPayload> + Clone,
    RealPayload: Encode + Clone,

Convenience function for quickly checking the signature on signed data.