IORedis: how to publish ArrayBuffer

Question

I'm trying to publish an ArrayBuffer to a IORedis stream.

I do so as follow:

const ab = new ArrayBuffer(1); // ArrayBuffer of length = 1 byte
const dv = new DataView(ab);
dv.setInt8(0, 7); // Write the number 7 in the buffer
const buffer = Buffer.from(ab); // Convert to Buffer since that's what `publish` expects
redisPublisher.publish('buffer-test', buffer);

It's a toy example, in practice I'll want to encode complex stuff in the ArrayBuffer, not just a number. Anyway, then I try to read with

redisSubscriber.on('message', async (channel, data) => {
      logger.info(`Redis message: channel: ${channel}, data: ${data}, ${typeof data}`);
      // ... do something with it
    });

The problem is that data is empty, and its type is considered as string. As per the documentation I tried redisSubscriber.on('messageBuffer', ... instead, but it behaves exactly the same, so much so that I'm failing to understand the difference between the two.

Also confusing is that if I encode a Buffer, e.g.

const buffer = Buffer.from("I'm a string!", 'utf-8');
redisPublisher.publish('buffer-test', buffer);

Upon reception, data will again be a string, decoded from the Buffer, which in that toy case is ok but generally is not for me. I'd like to send an Buffer in, containing more complex data that just a string (an ArrayBuffer in my case), and get a Buffer out, that I could properly parse based on my needs and not have automatically read as a string.

Any help is welcome!