Function verify_leaf_chain

pub async fn verify_leaf_chain<T: NodeType, V: Versions>(
    leaf_chain: Vec<Leaf2<T>>,
    stake_table: &[PeerConfig<T>],
    success_threshold: U256,
    expected_height: u64,
    upgrade_lock: &UpgradeLock<T, V>,
) -> Result<Leaf2<T>>