Announcements

• Respect the privacy of participants
• Meetups are never recorded. We want everyone to feel comfortable participating and discussing the scheduled topics, anonymously if they wish

Acknowledgements

• Thanks to Vinteum and Bitcoin Paraguay for the support

Warmup

• Is recycling coins a thing? (bitcoin-dev)
• Running Bitcoin: client comparison (PDF)
• Cat images vs Filters
  • One liner: curl -s "https://mempool.space/api/tx/8a3c63c2e9ff88db03b58dba600e2cb78c77c921928034a709f903b080eeb34f" | jq -r '.vin[0].witness[2]' | tr -d '[:space:]' | grep -o -i -m1 '52494646[0-9a-f]*57454250[0-9a-f]*' | cut -c1-8192 | xxd -r -p > labitbu.webp
  • Labitbu
• Eggstr

Bitcoin (Core, protocol, wallets)

• Changing the minimum relay feerate
  • Delving thread
  • PR
• Utreexo — draft BIPs and request for review
  • Accumulator BIP
  • P2P BIP
  • Validation BIP
• Peer block template sharing — mitigate divergent mempool policies: Delving thread · Optech #366
  • BIP PR
• Chain Code Delegation — collaborative custody without xpub disclosure: Delving post
• Augur — mempool‑based fee estimation lib by Block: Delving post · Optech #365

L2 / Lightning

• BOLT12 in the wild — Alby Hub v1.18 adds offers; Umbrel app: Alby release note · Umbrel app
• Glock — Alpen Labs’ proposal for fast verification using garbled circuits + DV‑SNARKs: Blog
  • Paper

Privacy / Cryptography / Research

• FROSTSnap — ergonomic threshold signing stack: frostsnap.com
• LND gossip DoS vuln (historic) — fixed in 0.18.3; recap for operators: Optech #364