Nostr Web Client

74.1 sat/vB mempool min fee!

It's possible that someone is setting up for an attack on lightning. The current Lightning protocol is kinda broken with respect to fees, as your commitment transaction (and refund transaction) isn't necessarily high fee enough to get propagated.

It's not quite as much of a problem as you'd expect, as many well connected nodes (rg mempool.space) have much bigger mempools. But anyway, lightning needs to get this fixed.

Not using RBF to begin with was a big mistake.

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Discussion

Louferlou 2y ago

Very dumb question I guess but why do nodes wait for new htlc to go through their mutual channel to build the next commitment tx and update the feerate ?

Why can’t they build a new commitment tx every x block/time to keep the fees up to date ?

Peter Todd 2y ago

No matter how often you try to keep fees up to date, the fact is they can change unexpected by the time that you actually need the transaction. This is especially true in cases where nodes go offline unexpected – one of the more common reasons to need to force close in the first place.

Elephant in the root 2y ago

RBF is harder to coordinate than CPFP. I think not having package relay is (another) problem?

Peter Todd 2y ago

This is in the context of protocols like lightning, so adding RBF is something that code would do automatically.

Elephant in the root 2y ago

I mean yes, you can add the flag but then you need to repeat signing rounds to update transactions since it's 2of2.

Peter Todd 2y ago

Well, read the article. As I explain that's not hard to do in an automated system.

Elephant in the root 2y ago

Ah, pre-signing various variants. I don't like it much and it'd be nice to try to figure out if it can be solved differently but from first glance it looks like it's at least better than the current situation.

Peter Todd 2y ago

You know, I've actually had people send me pre-signed txs at multiple fee rates before when they wanted to transfer me large amounts of ₿ and wanted to give me the option of choosing what fee rate to pay.

It's easily automated; the code can do all the hard work behind the scenes.