go-libp2p-examples | Example libp2p applications

I am following this tutorial:

https://github.com/libp2p/go-libp2p-examples/tree/master/chat-with-mdns

In a short form, it:

1. configures a p2p host
2. sets a default handler function for incoming connections (3. not necessary)
3. and opens a stream to the connecting peers:

stream, err := host.NewStream(ctx, peer.ID, protocol.ID(cfg.ProtocolID))

Afterwards, there is a buffer stream/read-write variable created:

rw := bufio.NewReadWriter(bufio.NewReader(stream), bufio.NewWriter(stream))

Now this stream is used to send and receive data between the peers. This is done using two goroutine functions that have rw as an input:

go writeData(rw) go readData(rw)

My problems are:

1. I want to send data to my peers and need feedback from them: e.g. in rw there is a question and they need to answer yes/no. How can I transfer back this answer and process it (enable some interaction)?

2. The data I want to send in rw is not always the same. Sometimes it's a string containing only a name, sometimes it's a string containing a whole block etc. How can I distinguish?

I thought about those solutions. But I am new to golang, so maybe you have a better one:

• do I need a new stream for every different content: stream, err := host.NewStream(ctx, peer.ID, protocol.ID(cfg.ProtocolID))

• do I need to open more buffered rw varibales for every different content: rw := bufio.NewReadWriter(bufio.NewReader(stream), bufio.NewWriter(stream))

• are there any other solutions?

Thank you for any help to solve this!!