If you have three Lightning channels, and two of them have plenty of spending capacity, but you want to send a transaction that is larger than the balance in either individual channel… does your node “do the work” for you to make a combined payment from both channels? Would it likewise split out a larger incoming payment to multiple channels, and “fill the first cup before it starts filling the next”
How does it know to do this, if each channel is opened to a different peer? #asknostr
You’ll have to use AMP. You can do this with nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5.
https://docs.lightning.engineering/lightning-network-tools/lnd/amp
Prob easier to just have a fat channel with lots of liquidity in both directions though
Renting fat channels is a good option. Phoenix offers this in their app.
Thanks my dude. Lots of learning to do 🫡
If you wanna go down the rabbit hole, read at least the first few chapters of Mastering Lightning
Another great resource I have learnt a lot from is the voltage blog. Many well written and easy to understand articles the Lightning topics I have had questions for.
This post discusses multipart payments which your question is about.
https://www.voltage.cloud/blog/multipart-payments-on-lightning-network-break-down-amp-and-mmp
And this may be a good place to start learning about running your own personal node in general.
Not sure how far along the journey you are but I have found this my goto site for learning something about lightning.
Cashu has a proposal (NUT) in work for this:
https://github.com/cashubtc/nuts/blob/8f0c6dedd1d34339f55e3c8b69cff7c7cb1c49fc/15.md
