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feat(libp2p): add SwarmBuilder

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Introduce the new `libp2p::SwarmBuilder`. Users should use the new `libp2p::SwarmBuilder` instead of the now deprecated `libp2p::swarm::SwarmBuilder`. See `libp2p::SwarmBuilder` docs on how to use the new builder.

Fixes #3657.
Fixes #3563.
Fixes #3179.

Pull-Request: #4120.
This commit is contained in:
Max Inden
2023-10-10 08:55:14 +02:00
committed by GitHub
parent 3ae72557ab
commit d605255fec
62 changed files with 2970 additions and 940 deletions
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55
examples/ipfs-kad/src/main.rs
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@ -27,12 +27,7 @@ use std::time::{Duration, Instant};
use anyhow::{bail, Result};
use clap::Parser;
use futures::StreamExt;
use libp2p::{
bytes::BufMut,
identity, kad,
swarm::{SwarmBuilder, SwarmEvent},
tokio_development_transport, PeerId,
};
use libp2p::{bytes::BufMut, identity, kad, noise, swarm::SwarmEvent, tcp, yamux, PeerId};
const BOOTNODES: [&str; 4] = [
"QmNnooDu7bfjPFoTZYxMNLWUQJyrVwtbZg5gBMjTezGAJN",
@ -47,28 +42,32 @@ async fn main() -> Result<()> {
// Create a random key for ourselves.
let local_key = identity::Keypair::generate_ed25519();
let local_peer_id = PeerId::from(local_key.public());
// Set up a an encrypted DNS-enabled TCP Transport over the yamux protocol
let transport = tokio_development_transport(local_key.clone())?;
let mut swarm = libp2p::SwarmBuilder::with_existing_identity(local_key.clone())
.with_tokio()
.with_tcp(
tcp::Config::default(),
noise::Config::new,
yamux::Config::default,
)?
.with_dns()?
.with_behaviour(|key| {
// Create a Kademlia behaviour.
let mut cfg = kad::Config::default();
cfg.set_query_timeout(Duration::from_secs(5 * 60));
let store = kad::store::MemoryStore::new(key.public().to_peer_id());
kad::Behaviour::with_config(key.public().to_peer_id(), store, cfg)
})?
.build();
// Create a swarm to manage peers and events.
let mut swarm = {
// Create a Kademlia behaviour.
let mut cfg = kad::Config::default();
cfg.set_query_timeout(Duration::from_secs(5 * 60));
let store = kad::store::MemoryStore::new(local_peer_id);
let mut behaviour = kad::Behaviour::with_config(local_peer_id, store, cfg);
// Add the bootnodes to the local routing table. `libp2p-dns` built
// into the `transport` resolves the `dnsaddr` when Kademlia tries
// to dial these nodes.
for peer in &BOOTNODES {
behaviour.add_address(&peer.parse()?, "/dnsaddr/bootstrap.libp2p.io".parse()?);
}
SwarmBuilder::with_tokio_executor(transport, behaviour, local_peer_id).build()
};
// Add the bootnodes to the local routing table. `libp2p-dns` built
// into the `transport` resolves the `dnsaddr` when Kademlia tries
// to dial these nodes.
for peer in &BOOTNODES {
swarm
.behaviour_mut()
.add_address(&peer.parse()?, "/dnsaddr/bootstrap.libp2p.io".parse()?);
}
let cli_opt = Opt::parse();
@ -83,11 +82,11 @@ async fn main() -> Result<()> {
let mut pk_record_key = vec![];
pk_record_key.put_slice("/pk/".as_bytes());
pk_record_key.put_slice(local_peer_id.to_bytes().as_slice());
pk_record_key.put_slice(swarm.local_peer_id().to_bytes().as_slice());
let mut pk_record =
kad::Record::new(pk_record_key, local_key.public().encode_protobuf());
pk_record.publisher = Some(local_peer_id);
pk_record.publisher = Some(*swarm.local_peer_id());
pk_record.expires = Some(Instant::now().add(Duration::from_secs(60)));
swarm