define proper parent error type for `YamuxError`

[etan-status]

All errors raised by nim-libp2p should descend from LPError. YamuxError was not correctly classified. Proposing it to be a specialized MuxerError, in line with mplex and muxer errors.

[codecov[bot]]

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[diegomrsantos]

@etan-status Could you please explain what LPError means and why errors should descend from it?

[dryajov]

@etan-status Could you please explain what LPError means and why errors should descend from it?

LPError is the root object of libp2p's error hierarchy - this has always been it's original intent.

[diegomrsantos]

Thanks, I meant literally, what does the name mean?

[dryajov]

Thanks, I meant literally, what does the name mean?

Oh, heh - the LP prefix was chosen as a shorthand for libp2p, otherwise we'd be writing something like Libp2pError all over the place :)

[diegomrsantos]

I see, maybe P2PError would be more descriptive?

[dryajov]

I see, maybe P2PError would be more descriptive?

well, imo p2p is quite generic and LP is a well established convention in nim libp2p, I personally don't see a need to change it, but I'm also don't feel very strongly about it.

[diegomrsantos]

It never crossed my mind that LP means libp2p. I believe a comment or docs would be beneficial.

[etan-status]

@etan-status Could you please explain what LPError means and why errors should descend from it?

It's a followup from #582. LPError is the root of all nim-libp2p originated errors. That convention is mostly followed, with very few individual exceptions that are being addressed. Rationale is so that {.async: (raises).} can be restricted to the parent for the outermost layer.