https://conduition.io/scriptless/multi-party-submarine-swaps/

Any news on that?

Its not lnurlw, it's a primal url or code iirc

I don't think AMP would help solve the issue of one party being able to steal the funds of the other sending parties in the concept of collaboratively paying a single lightning invoice. At least one of the sending parties still has access to the full preimage and could use it to steal htlcs of the other sending parties.

In a swap the senders of the lightning htlcs know the preimage (instead of the recipient like in a normal ln payment). I think it wouldn't be save for multiple senders of htlcs to know the preimage as they could then try to steal from each other if the other htlcs route through a node they control. Also the swap counterparty would have to lock an output to a condition which can be collaboratively unlocked. Well you could probably give each sender a separate invoice, and then create a fat script which locks to all hashes, but then they would all have to collaboratively agree on a claim tx which seems complicated and prone to failure. What is much more realistic is just batching pending swaps while the locking tx is unconfirmed by adding additional outputs to the locking tx until it gets confirmed if it happens that multiple people do swaps with the provider at roughly the same time. This is already done by Electrum for example.

What do you mean exactly, who is the recipient of the ln payment? In theory there is no issue with doing MPP in a swap I think. The recipient of the ln payment can wait until all htlcs are received (the full amount), then lock funds onchain to the payment hash. When the sender of the htlcs spends the utxo with the preimage the recipient can see the preimage on the chain and settle the htlcs with it. This seems unrelated to using MPP or not.

#Electrum 4.6.0 has been released and is now available for download on electrum.org Now with plugin system, submarine swaps over #nostr, anchor channels, #nwc plugin and more. See the release notes for the full list of changes: https://github.com/spesmilo/electrum/blob/4.6.0/RELEASE-NOTES

Kind of insane its necessary to go this far for an appointment😂 With mullvad VPN and their CLI its trivial to quickly bewitch between lots of IPs, but the reputation of these IPs is often not as good so maybe it results in harder captchas.

Its a website? You could write a little webscraper. Some people already did this for other offices :D https://gist.github.com/xuio/297e16b84d700314241393e8f3aa42f3