sloppy-weasel-of-politeness • 1.2k sats
wrote:When fees are expensive it may be more economical to open multiple channels with one transaction. Also to avoid extra transaction for transferring funds to lightning node I want to open the channels directly from the hardware wallet.
magic-loon-of-beauty (not signed) • 55k sats
wrote:This is currently possible using PSBT and HWW supporting it, like Coldcard. You can use LND directly or with a wrapper which makes it easier, for example bos or maybe own simple script to handle funding automatically.
Directly in LND, use --psbt flag to start funding transaction or channel opening, for example: lncli openchannel --psbt --node-key <id> --local_amt <sats>. Output of this gives you PSBT which you have to feed to another round of command as --base_psbt parameter.
So next command would look like lncli openchannel --psbt --node-key <id> --local_amt <sats> --base_psbt <previous_psbt>. Repeat for how many channels you want. It always gives you PSBT (with multiple addresses) you need to fund with externally. Prepare transaction with correct outputs in external wallet like Electrum, sign it with Coldcard and past PSBT from Coldcard to terminal, lnd is asking for it.
magic-loon-of-beauty (not signed) • 55k sats
wrote:That's the short version for how to do it with lnd. For more docs, check for example https://github.com/guggero/lnd/blob/84dfed3fe2d28ceda343944874ab47fb57b73515/docs/psbt.md and https://blog.lightningconductors.net/channels/2020/12/10/opening-psbt.html. With Balance of Satoshi, it might be even easier but I didn't test personally. http://satbase.org/bos-open/
greedy-hog-from-jupiter • 120 sats
wrote:Is this considered as resolved? Could I get the bounty? I wasn't able to sign all of the comments because of some issue with website, I managed to sign only second comment.
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