[bitcoin-dev] [Lightning-dev] Removing the Dust Limit

ZmnSCPxj ZmnSCPxj at protonmail.com
Wed Aug 11 00:46:36 UTC 2021


Good morning all,

Thinking a little more, if the dust limit is intended to help keep UTXO sets down, then on the LN side, this could be achieved as well by using channel factories (including "one-shot" factories which do not allow changing the topology of the subgraph inside the factory, but have the advantage of not requiring either `SIGHASH_NOINPUT` or an extra CSV constraint that is difficult to weigh in routing algorithms), where multiple channels are backed by a single UTXO.

Of course, with channel factories there is now a greater set of participants who will have differing opinions on appropriate feerate.

So I suppose one can argue that the dust limit becomes less material to higher layers, than actual onchain feerates.


Regards,
ZmnSCPxj


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