fix(webtransport-websys): handle exceptions in WebTransport::close

Cargo.toml

@@ -113,7 +113,7 @@ libp2p-webrtc-utils = { version = "0.2.0", path = "misc/webrtc-utils" }
 libp2p-webrtc-websys = { version = "0.3.0-alpha", path = "transports/webrtc-websys" }
 libp2p-websocket = { version = "0.43.0", path = "transports/websocket" }
 libp2p-websocket-websys = { version = "0.3.2", path = "transports/websocket-websys" }
-libp2p-webtransport-websys = { version = "0.2.0", path = "transports/webtransport-websys" }
+libp2p-webtransport-websys = { version = "0.2.1", path = "transports/webtransport-websys" }
 libp2p-yamux = { version = "0.45.1", path = "muxers/yamux" }
 multiaddr = "0.18.1"
 multihash = "0.19.1"

transports/webtransport-websys/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.2.1 -- unreleased
+
+* Fix unhandled exceptions thrown when calling `Webtransport::close`
+  See [PR 5390](https://github.com/libp2p/rust-libp2p/pull/5390)
+
 ## 0.2.0
 
 

transports/webtransport-websys/Cargo.toml

@@ -3,7 +3,7 @@ name = "libp2p-webtransport-websys"
 edition = "2021"
 rust-version = { workspace = true }
 description = "WebTransport for libp2p under WASM environment"
-version = "0.2.0"
+version = "0.2.1"
 authors = [
     "Yiannis Marangos <yiannis@eiger.co>",
     "oblique <psyberbits@gmail.com>",

transports/webtransport-websys/src/connection.rs

@@ -47,6 +47,12 @@ impl Connection {
             let opts = endpoint.webtransport_opts();
             WebTransport::new_with_options(&url, &opts).map_err(Error::from_js_value)?
         };
+        // Create a promise that will resolve once session is closed.
+        // It will catch the errors that can eventually happen when
+        // `.close()` is called. Without it, there is no way of catching
+        // those from the `.close()` itself, resulting in `Uncaught in promise...`
+        // logs popping up.
+        detach_promise(session.closed());
 
         let incoming_streams = session.incoming_bidirectional_streams();
         let incoming_streams_reader =