chore(relay): move server example to examples/

Related: #3111.

Pull-Request: #3663.

Cargo.lock

@@ -2715,20 +2715,16 @@ version = "0.15.1"
 dependencies = [
  "asynchronous-codec",
  "bytes",
- "clap 4.1.11",
  "either",
  "env_logger 0.10.0",
  "futures",
  "futures-timer",
  "instant",
  "libp2p-core",
- "libp2p-identify",
  "libp2p-identity",
- "libp2p-noise",
  "libp2p-ping",
  "libp2p-plaintext",
  "libp2p-swarm",
- "libp2p-tcp",
  "libp2p-yamux",
  "log",
  "quick-protobuf",
@@ -4054,6 +4050,18 @@ version = "0.6.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"
 
+[[package]]
+name = "relay-server-example"
+version = "0.1.0"
+dependencies = [
+ "async-std",
+ "async-trait",
+ "clap 4.1.11",
+ "env_logger 0.10.0",
+ "futures",
+ "libp2p",
+]
+
 [[package]]
 name = "rendezvous-example"
 version = "0.1.0"

Cargo.toml

@@ -10,6 +10,7 @@ members = [
     "examples/ipfs-kad",
     "examples/ipfs-private",
     "examples/ping-example",
+    "examples/relay-server",
     "examples/rendezvous",
     "identity",
     "interop-tests",

examples/relay-server/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "relay-server-example"
+version = "0.1.0"
+edition = "2021"
+publish = false
+license = "MIT"
+
+[dependencies]
+clap = { version = "4.1.11", features = ["derive"] }
+async-std = { version = "1.12", features = ["attributes"] }
+async-trait = "0.1"
+env_logger = "0.10.0"
+futures = "0.3.27"
+libp2p = { path = "../../libp2p", features = ["async-std", "noise", "macros", "ping", "tcp", "identify", "yamux", "relay"] }

examples/relay-server/src/main.rs

@@ -22,17 +22,16 @@
 use clap::Parser;
 use futures::executor::block_on;
 use futures::stream::StreamExt;
-use libp2p_core::multiaddr::Protocol;
+use libp2p::{
-use libp2p_core::upgrade;
+    core::multiaddr::Protocol,
-use libp2p_core::{Multiaddr, Transport};
+    core::upgrade,
-use libp2p_identify as identify;
+    core::{Multiaddr, Transport},
-use libp2p_identity as identity;
+    identify, identity,
-use libp2p_identity::PeerId;
+    identity::PeerId,
-use libp2p_noise as noise;
+    noise, ping, relay,
-use libp2p_ping as ping;
+    swarm::{NetworkBehaviour, SwarmBuilder, SwarmEvent},
-use libp2p_relay as relay;
+    tcp,
-use libp2p_swarm::{NetworkBehaviour, SwarmBuilder, SwarmEvent};
+};
-use libp2p_tcp as tcp;
 use std::error::Error;
 use std::net::{Ipv4Addr, Ipv6Addr};
 
@@ -55,7 +54,7 @@ fn main() -> Result<(), Box<dyn Error>> {
             noise::NoiseAuthenticated::xx(&local_key)
                 .expect("Signing libp2p-noise static DH keypair failed."),
         )
-        .multiplex(libp2p_yamux::YamuxConfig::default())
+        .multiplex(libp2p::yamux::YamuxConfig::default())
         .boxed();
 
     let behaviour = Behaviour {
@@ -94,7 +93,6 @@ fn main() -> Result<(), Box<dyn Error>> {
 }
 
 #[derive(NetworkBehaviour)]
-#[behaviour(prelude = "libp2p_swarm::derive_prelude")]
 struct Behaviour {
     relay: relay::Behaviour,
     ping: ping::Behaviour,

protocols/relay/Cargo.toml

@@ -29,14 +29,10 @@ thiserror = "1.0"
 void = "1"
 
 [dev-dependencies]
-clap = { version = "4.1.11", features = ["derive"] }
 env_logger = "0.10.0"
-libp2p-identify = { path = "../../protocols/identify" }
-libp2p-noise = { path = "../../transports/noise" }
 libp2p-ping = { path = "../../protocols/ping" }
 libp2p-plaintext = { path = "../../transports/plaintext" }
 libp2p-swarm = { path = "../../swarm", features = ["macros"] }
-libp2p-tcp = { path = "../../transports/tcp", features = ["async-io"] }
 libp2p-yamux = { path = "../../muxers/yamux" }
 quickcheck = { package = "quickcheck-ext", path = "../../misc/quickcheck-ext" }