Function fetch_proposal

pub(crate) async fn fetch_proposal<TYPES: NodeType, V: Versions>(
    qc: &QuorumCertificate2<TYPES>,
    event_sender: Sender<Arc<HotShotEvent<TYPES>>>,
    event_receiver: Receiver<Arc<HotShotEvent<TYPES>>>,
    membership_coordinator: EpochMembershipCoordinator<TYPES>,
    consensus: OuterConsensus<TYPES>,
    sender_public_key: TYPES::SignatureKey,
    sender_private_key: <TYPES::SignatureKey as SignatureKey>::PrivateKey,
    upgrade_lock: &UpgradeLock<TYPES, V>,
    epoch_height: u64,
) -> Result<(Leaf2<TYPES>, View<TYPES>)>

Trigger a request to the network for a proposal for a view and wait for the response or timeout.