Meeting Notes 2021 11 01

Next release 0.0.103

• Mostly waiting on bindings at this point
  • Hopefully done today
• 2 PRs
  • 1054 fee affordability
  • 1146 scorer serialization
• 1146
  • When updating the sample for this, realized we need to bring shared ownership of netgraph to netgraphmsghandler. PR almost ready to open (jeff)
• 1054
  • Hard to get edge cases right here
  • Tests fixed, only missing fuzzer fix
  • Antoine: problem is i don’t have the failing fuzzer input. Honggfuzz doesn’t give me a failure on what matt sent me
  • Matt: we can chat offline to get that working

DLC support

• Antoine: think the dlc ppl are stuck on how to integrate dlcs with ptlcs. Ptlcs aren’t really fixed on the lightning side
  • Don’t think tibo has done further advancements
• Ajtowns “lightning over taproot with ptlcs”: https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003278.html
• https://github.com/ElementsProject/secp256k1-zkp/pull/131
• https://github.com/ElementsProject/secp256k1-zkp/pull/131/files#diff-8e2f868d36d063c1051bbb5fa0366ff654142119847a8ba01af8e0c7f85efe90

Graph sync

• Arik: should have a PR in next couple hours for rust client. Got a separate crate
  • Put up a shitty proxy server to lnsync that reduces the size considerably
  • Will work on rust server next, which will take more time
• Matt: #s on bandwidth usage?
  • Arik: current shitty proxy that takes data from lnsync, reduces size of output from blockstream by ~80%.
  • Total depends on the amount of time
    • a day's worth of sync data is 14MB, or 2.7MB with the proxy

Signer support

• Miron: working on utxo design for lightning signer
  • Currently looking at utreexo data structure for that purpose
• Ken is submitting our c-lightning changes upstream so it can be compatible w/ lightning-signer

Spec

• Last spec meeting hung up for 30min on lnd folks saying “we wanna rate limit, but there’s a PR to limit pings, but we might wanna rate limit in the future..”
• We’re aggressive about pinging. We used to just disconnect people..
• Matt: Haven’t been keeping up a ton w/ the spec besides 1-2 PRs

Zurich meeting

• ariard: "btw, LnDev meeting notes from Zurich (Laolu credit): https://docs.google.com/document/d/1fPyjIUNkc9W1DPyMQ81isiv1fKDW9n7b0H6sObQ-QfU/edit"
• Think we found a way forward w/ blip stuff, lightning github org organization
• Check out the notes!

Bindings

• No updates besides reworking for 0.0.103

Website

• Soft launch of redesign, mostly thematically changed to be in sync w/ BDK
• Content-wise needs work

Misc

• Welcome evan!
  • Evan has a RN app called Zeus that allows remote access to lightning node
  • Haven’t done rust before, so getting a little bit of a grip on that first
• Sq crypto is hiring
  • Looking to hire a few more full-time engineers, focused on LDK and any roadmap that involves LDK
  • If you know good folks, let steve know
  • We’ll be making this public in the next couple of weeks