fix(webrtc example): clarify idle connection timeout

examples/browser-webrtc/README.md

@@ -5,6 +5,8 @@ It uses [wasm-pack](https://rustwasm.github.io/docs/wasm-pack/) to build the pro
 
 ## Running the example
 
+Ensure you have `wasm-pack` [installed](https://rustwasm.github.io/wasm-pack/).
+
 1. Build the client library:
 ```shell
 wasm-pack build --target web --out-dir static

examples/browser-webrtc/src/lib.rs

@@ -24,7 +24,9 @@ pub async fn run(libp2p_endpoint: String) -> Result<(), JsError> {
             webrtc_websys::Transport::new(webrtc_websys::Config::new(&key))
         })?
         .with_behaviour(|_| ping::Behaviour::new(ping::Config::new()))?
-        .with_swarm_config(|c| c.with_idle_connection_timeout(Duration::from_secs(5)))
+        // Ping does not KeepAlive, so we set the idle connection timeout to 32_212_254u64,
+        // which is the largest value that works with the wasm32 target.
+        .with_swarm_config(|c| c.with_idle_connection_timeout(Duration::from_secs(32_212_254u64)))
         .build();
 
     let addr = libp2p_endpoint.parse::<Multiaddr>()?;

examples/browser-webrtc/src/main.rs

@@ -38,7 +38,7 @@ async fn main() -> anyhow::Result<()> {
         .with_behaviour(|_| ping::Behaviour::default())?
         .with_swarm_config(|cfg| {
             cfg.with_idle_connection_timeout(
-                Duration::from_secs(30), // Allows us to observe the pings.
+                Duration::from_secs(u64::MAX), // Allows us to observe the pings.
             )
         })
         .build();