Lightning Specification Meeting 2022/01/03

[t-bast]

The meeting will take place on Monday 2022/01/03 at 7pm UTC (5:30am Adelaide time) on Libera Chat IRC #lightning-dev. It is open to the public.

A video link is available for higher bandwidth communication: https://meet.jit.si/Lightning-Spec-Meeting

Pull Request Review

• Warning messages BOLT 1: introduce warning messages, reduce requirements to send (hard) errors #834
• Clarify commit broadcast Removed requirement to broadcast an outdated commitment transaction #942
• Anchor outputs clean-up anchors: follow up changes after initial zero fee anchors merge #903
• Add payment metadata to payment request Add payment metadata to payment request (feature 48) #912
• Clarify channel_reestablish requirements Clarify and relax requirements on channel_reestablish #932
• Route blinding Route Blinding (Feature 24/25) #765
• Onion messages BOLT 7: Onion message support (features 38/39) #759
• Add dust exposure threshold Add a max_dust_htlc_exposure_msat #919
• Simple turbo channels enablement Explicitly allow funding_locked early, and support alias scids (feat 46/47/50/51) #910
• Dynamic DNS support in gossip messages BOLT 7: add gossip address descriptor type DNS hostname #911 or BOLT 1: adds remote address to optional init_tlvs (IP discovery) #917

Long Term Updates

• Dual funding interactive-tx: Add dual-funding flow, using the interactive tx protocol (feature 28/29) #851
• Liquidity ads option_will_fund: liquidity ads #878
• Splicing Splice draft (feature 62/63) #863
• Offers Offers #798
• Simplified commitment Feature 106/107: option_simplified_update. #867
• Trampoline routing Trampoline Routing (2021 edition) (Feature 56/57) #829 and Trampoline onion format (Feature 56/57) #836
• Upfront payments / DoS protection Hold fees #843
• Peer storage backup Peer backup storage (feature 40/41/42/43) #881
• Anonymous gossip
• Taproot updates

Backlog

The following are topics that we should discuss at some point, so if we have time to discuss them great, otherwise they slip to the next meeting.

• lnprototest (https://github.com/rustyrussell/lnprototest)

[Roasbeef]

Would like to add "taproot" to the long-term updates section. Possibly both the nearer term taproot-ification, as well as the possible paths to inclusion in the gossip layer.

[michaelfolkson]

Transcript: https://github.com/michaelfolkson/bitcointranscripts/blob/lightning-2022-01-03/lightning-specification/2022-01-03-specification-call.md