h WebTransport connection: ' + err);
                await new Promise(r => setTimeout(r, 1000));
                continue;
            }

            conn = c;
            dbg.info('WebTransport connection established');
            try {
                const {closeCode, reason} = await conn.closed;
                dbg.log(`WebTransport connection closed with code '${closeCode}': ${reason}`);
            } catch (err) {
                dbg.error('WebTransport connection failed: ' + err);
            }
   