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21 sats \ 6 replies \ @DarthCoin 2h \ parent \ on: lightningdevkit/ldk-node · Release v0.7.0 lightning
swap is just a refill/empty for a LN channel, without a resize of the channel. splicing is expanding or shrinking the size of a channel.
Are not the same and should be used in different occasions. Splicing have the same costs of opening/closing a LN channel, where swaps have different fees charged by the swap provider.
Splicing is a good thing and I hope we will have it also on LND soon. Sometimes, if your channel it gets filled quickly and you foresee in near future more incoming payments, then is good to expand the same channel, and not being forced to close it and open a bigger one.
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0 sats \ 5 replies \ @0xbitcoiner OP 2h
Hold on, does that mean we can do a swap through Splicing if the costs are better at that moment? I must be missing something.
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21 sats \ 4 replies \ @DarthCoin 2h
No swaps are swaps and splicing is splicing. Swaps are about liquidity, have to do only when you want to move sats out of a channel, or refill an empty channel, without any resize of the channel.
Splicing is about sizing, making bigger or smaller a channel size, without any moving of sats in/out of that channel.
Think about this:
  • swaps: a glass of water that you drink it and refill it. The glass remain the same only the content is changing.
  • splicing: a small glass of water, that you change it for a bigger one with the same amount of water in it. Shrinking of a channel doesn't make too much sense, you always want a bigger glass... but yes is possible to shrink a channel too.
ARE 2 DIFFERENT THINGS.
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0 sats \ 3 replies \ @0xbitcoiner OP 2h
Got it. What happens if you wanna shrink the cup below the water that’s already in it? Do you have to empty the water first?
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21 sats \ 2 replies \ @DarthCoin 2h
you can't do that. The shrinking will fail. The level of water must lower than the new size of the glass. But what you can do is a swap out into onchain first of the sats from that channel you want to shrink or rebalance with another channel you have, then do the shrinking. But again, shrinking is quite dumb.
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21 sats \ 1 reply \ @0xbitcoiner OP 2h
Figured. But do you have to empty the cup completely, or is it enough for the water level to just be below the size we want?
edit: You edited your reply and you already answered my question.
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0 sats \ 0 replies \ @DarthCoin 2h
No, no need to empty the channel before doing a splicing in or out.
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