refactor(webrtc): remove example in favor of browser-webrtc example

We've moved away from having individual examples in crates in #3111. This one in `transports/webrtc` seems to have slipped through.

Pull-Request: #4531.

Cargo.lock

@@ -3180,20 +3180,16 @@ dependencies = [
 name = "libp2p-webrtc"
 version = "0.6.1-alpha"
 dependencies = [
- "anyhow",
  "async-trait",
  "bytes",
  "env_logger 0.10.0",
  "futures",
  "futures-timer",
  "hex",
- "hex-literal",
  "if-watch",
  "libp2p-core",
  "libp2p-identity",
  "libp2p-noise",
- "libp2p-ping",
- "libp2p-swarm",
  "libp2p-webrtc-utils",
  "log",
  "multihash",
@@ -3206,8 +3202,6 @@ dependencies = [
  "tinytemplate",
  "tokio",
  "tokio-util",
- "unsigned-varint",
- "void",
  "webrtc",
 ]
 

transports/webrtc/Cargo.toml

@@ -38,20 +38,10 @@ tokio = ["dep:tokio", "dep:tokio-util", "dep:webrtc", "if-watch/tokio"]
 pem = ["webrtc?/pem"]
 
 [dev-dependencies]
-anyhow = "1.0"
 env_logger = "0.10"
-hex-literal = "0.4"
-libp2p-swarm = { workspace = true, features = ["macros", "tokio"] }
-libp2p-ping = { workspace = true }
 tokio = { version = "1.32", features = ["full"] }
-unsigned-varint = { version = "0.7", features = ["asynchronous_codec"] }
-void = "1"
 quickcheck = "1.0.3"
 
 [[test]]
 name = "smoke"
 required-features = ["tokio"]
-
-[[example]]
-name = "listen_ping"
-required-features = ["tokio"]

transports/webrtc/examples/listen_ping.rs

@@ -1,61 +0,0 @@
-use anyhow::Result;
-use futures::StreamExt;
-use libp2p_core::muxing::StreamMuxerBox;
-use libp2p_core::Transport;
-use libp2p_identity as identity;
-use libp2p_ping as ping;
-use libp2p_swarm::{Swarm, SwarmBuilder};
-use rand::thread_rng;
-use std::time::Duration;
-use void::Void;
-
-/// An example WebRTC server that will accept connections and run the ping protocol on them.
-#[tokio::main]
-async fn main() -> Result<()> {
-    let mut swarm = create_swarm()?;
-
-    swarm.listen_on("/ip4/127.0.0.1/udp/0/webrtc-direct".parse()?)?;
-
-    loop {
-        let event = swarm.next().await.unwrap();
-        eprintln!("New event: {event:?}")
-    }
-}
-
-fn create_swarm() -> Result<Swarm<ping::Behaviour>> {
-    let id_keys = identity::Keypair::generate_ed25519();
-    let peer_id = id_keys.public().to_peer_id();
-    let transport = libp2p_webrtc::tokio::Transport::new(
-        id_keys,
-        libp2p_webrtc::tokio::Certificate::generate(&mut thread_rng())?,
-    );
-
-    let cfg = ping::Config::new().with_interval(Duration::from_millis(10));
-    let transport = transport
-        .map(|(peer_id, conn), _| (peer_id, StreamMuxerBox::new(conn)))
-        .boxed();
-
-    Ok(
-        SwarmBuilder::with_tokio_executor(transport, ping::Behaviour::new(cfg.clone()), peer_id)
-            .idle_connection_timeout(Duration::from_secs(5))
-            .build(),
-    )
-}
-
-#[derive(Debug)]
-#[allow(clippy::large_enum_variant)]
-enum Event {
-    Ping(ping::Event),
-}
-
-impl From<ping::Event> for Event {
-    fn from(e: ping::Event) -> Self {
-        Event::Ping(e)
-    }
-}
-
-impl From<Void> for Event {
-    fn from(event: Void) -> Self {
-        void::unreachable(event)
-    }
-}

transports/webrtc/src/tokio/certificate.rs

@@ -97,24 +97,18 @@ enum Kind {
     InvalidPEM(#[from] webrtc::Error),
 }
 
-#[cfg(test)]
+#[cfg(all(test, feature = "pem"))]
 mod test {
-    #[cfg(feature = "pem")]
-    use anyhow::Result;
-
-    #[cfg(feature = "pem")]
-    #[test]
-    fn test_certificate_serialize_pem_and_from_pem() -> Result<()> {
     use super::*;
     use rand::thread_rng;
 
+    #[test]
+    fn test_certificate_serialize_pem_and_from_pem() {
         let cert = Certificate::generate(&mut thread_rng()).unwrap();
 
         let pem = cert.serialize_pem();
-        let loaded_cert = Certificate::from_pem(&pem)?;
+        let loaded_cert = Certificate::from_pem(&pem).unwrap();
 
-        assert_eq!(loaded_cert, cert);
+        assert_eq!(loaded_cert, cert)
-
-        Ok(())
     }
 }