#![cfg(test)] use libp2p::gossipsub::GossipsubConfigBuilder; use network::Enr; use network::EnrExt; use network::Multiaddr; use network::Service as LibP2PService; use network::{Libp2pEvent, NetworkConfig}; use std::sync::Weak; use std::time::Duration; use tokio::runtime::Runtime; use tracing::{debug, error}; use unused_port::unused_tcp_port; #[allow(clippy::type_complexity)] #[allow(unused)] pub mod behaviour; #[allow(clippy::type_complexity)] #[allow(unused)] pub mod swarm; type ReqId = usize; use tempfile::Builder as TempBuilder; use tokio::sync::mpsc::unbounded_channel; #[allow(unused)] pub struct Libp2pInstance(LibP2PService, exit_future::Signal); impl std::ops::Deref for Libp2pInstance { type Target = LibP2PService; fn deref(&self) -> &Self::Target { &self.0 } } impl std::ops::DerefMut for Libp2pInstance { fn deref_mut(&mut self) -> &mut Self::Target { &mut self.0 } } pub fn build_config(port: u16, mut boot_nodes: Vec) -> NetworkConfig { let mut config = NetworkConfig::default(); let path = TempBuilder::new() .prefix(&format!("libp2p_test{}", port)) .tempdir() .unwrap(); config.libp2p_port = port; // tcp port config.discovery_port = port; // udp port config.enr_tcp_port = Some(port); config.enr_udp_port = Some(port); config.enr_address = Some("127.0.0.1".parse().unwrap()); config.boot_nodes_enr.append(&mut boot_nodes); config.network_dir = path.into_path(); // Reduce gossipsub heartbeat parameters config.gs_config = GossipsubConfigBuilder::from(config.gs_config) .heartbeat_initial_delay(Duration::from_millis(500)) .heartbeat_interval(Duration::from_millis(500)) .build() .unwrap(); config } pub async fn build_libp2p_instance(rt: Weak, boot_nodes: Vec) -> Libp2pInstance { let port = unused_tcp_port().unwrap(); let config = build_config(port, boot_nodes); // launch libp2p service let (signal, exit) = exit_future::signal(); let (shutdown_tx, _) = futures::channel::mpsc::channel(1); let executor = task_executor::TaskExecutor::new(rt, exit, shutdown_tx); let libp2p_context = network::Context { config: &config }; let (sender, _) = unbounded_channel(); Libp2pInstance( LibP2PService::new(executor, sender, libp2p_context) .await .expect("should build libp2p instance") .2, signal, ) } #[allow(dead_code)] pub fn get_enr(node: &LibP2PService) -> Enr { node.swarm.behaviour().local_enr() } // Returns `n` libp2p peers in fully connected topology. #[allow(dead_code)] pub async fn build_full_mesh(rt: Weak, n: usize) -> Vec { let mut nodes = Vec::with_capacity(n); for _ in 0..n { nodes.push(build_libp2p_instance(rt.clone(), vec![]).await); } let multiaddrs: Vec = nodes .iter() .map(|x| get_enr(x).multiaddr()[1].clone()) .collect(); for (i, node) in nodes.iter_mut().enumerate().take(n) { for (j, multiaddr) in multiaddrs.iter().enumerate().skip(i) { if i != j { match libp2p::Swarm::dial(&mut node.swarm, multiaddr.clone()) { Ok(()) => debug!("Connected"), Err(_) => error!("Failed to connect"), }; } } } nodes } // Constructs a pair of nodes with separate loggers. The sender dials the receiver. // This returns a (sender, receiver) pair. #[allow(dead_code)] pub async fn build_node_pair(rt: Weak) -> (Libp2pInstance, Libp2pInstance) { let mut sender = build_libp2p_instance(rt.clone(), vec![]).await; let mut receiver = build_libp2p_instance(rt, vec![]).await; let receiver_multiaddr = receiver.swarm.behaviour_mut().local_enr().multiaddr()[1].clone(); // let the two nodes set up listeners let sender_fut = async { loop { if let Libp2pEvent::NewListenAddr(_) = sender.next_event().await { return; } } }; let receiver_fut = async { loop { if let Libp2pEvent::NewListenAddr(_) = receiver.next_event().await { return; } } }; let joined = futures::future::join(sender_fut, receiver_fut); // wait for either both nodes to listen or a timeout tokio::select! { _ = tokio::time::sleep(Duration::from_millis(500)) => {} _ = joined => {} } match libp2p::Swarm::dial(&mut sender.swarm, receiver_multiaddr.clone()) { Ok(()) => { debug!(address = %format!("{:?}", receiver_multiaddr), "Sender dialed receiver") } Err(_) => error!("Dialing failed"), }; (sender, receiver) } // Returns `n` peers in a linear topology #[allow(dead_code)] pub async fn build_linear(rt: Weak, n: usize) -> Vec { let mut nodes = Vec::with_capacity(n); for _ in 0..n { nodes.push(build_libp2p_instance(rt.clone(), vec![]).await); } let multiaddrs: Vec = nodes .iter() .map(|x| get_enr(x).multiaddr()[1].clone()) .collect(); for i in 0..n - 1 { match libp2p::Swarm::dial(&mut nodes[i].swarm, multiaddrs[i + 1].clone()) { Ok(()) => debug!("Connected"), Err(_) => error!("Failed to connect"), }; } nodes }