Function parent_leaf_and_state

pub(crate) async fn parent_leaf_and_state<TYPES: NodeType, V: Versions>(
    event_sender: &Sender<Arc<HotShotEvent<TYPES>>>,
    event_receiver: &Receiver<Arc<HotShotEvent<TYPES>>>,
    membership: EpochMembershipCoordinator<TYPES>,
    public_key: TYPES::SignatureKey,
    private_key: <TYPES::SignatureKey as SignatureKey>::PrivateKey,
    consensus: OuterConsensus<TYPES>,
    upgrade_lock: &UpgradeLock<TYPES, V>,
    parent_qc: &QuorumCertificate2<TYPES>,
    epoch_height: u64,
) -> Result<(Leaf2<TYPES>, Arc<<TYPES as NodeType>::ValidatedState>)>

Gets the parent leaf and state from the parent of a proposal, returning an [utils::anytrace::Error] if not.