defaultMuxers top-level property

Option defaultMuxers

Default configuration options for libp2p Default muxer configuration for Yamux.

This factory now matches the Multiplexer Function(Conn secureConn, bool isClient) signature. It assumes secureConn can be cast to TransportConn as required by YamuxSession. The actual connection upgrade logic (security + muxer negotiation) will be handled by the Swarm/Upgrader, which will then call this factory.

Implementation

/// Default muxer configuration for Yamux.
///
/// This factory now matches the `Multiplexer Function(Conn secureConn, bool isClient)`
/// signature. It assumes `secureConn` can be cast to `TransportConn` as required
/// by `YamuxSession`. The actual connection upgrade logic (security + muxer negotiation)
/// will be handled by the Swarm/Upgrader, which will then call this factory.
Option defaultMuxers = Libp2p.muxer(
  '/yamux/1.0.0',
  (secureConn, isClient) {
    // YamuxSession expects a TransportConn.
    // The `secureConn` provided by the (future) Upgrader should be compatible.
    if (secureConn is! TransportConn) {
      // This might happen if the security layer doesn't output a TransportConn.
      // Or if an insecure connection (which might be a raw TransportConn) is used directly.
      // For now, we'll throw if it's not directly a TransportConn.
      // A more robust solution might involve an adapter or ensuring the security
      // layer preserves or wraps TransportConn capabilities.
      throw ArgumentError(
          'YamuxSession factory requires a TransportConn, but received ${secureConn.runtimeType}. '
          'The Upgrader needs to ensure the connection passed to the muxer factory is suitable.');
    }
    return YamuxSession(
      secureConn, // Already checked to be a TransportConn
      const MultiplexerConfig(), // Use default Yamux config
      isClient,
    );
  },
);