Bitcoin Optech: Newsletter #274 Recap

Bitcoin Optech: Newsletter #274 Recap

Mark “Murch” Erhardt and Mike Schmidt are joined by Bastien Teinturier, Fabian Jahr, Ethan Heilman, and Armin Sabouri to discuss Newsletter #274.


News

  • Replacement cycling vulnerability against HTLCs (1:40)
  • Bitcoin UTXO set summary hash replacement (24:21)
  • Research into generic covenants with minimal Script language changes (40:02)
  • Proposed BIP for OP_CAT (45:38)

Selected Q&A from Bitcoin Stack Exchange

  • How does the Branch and Bound coin selection algorithm work? (52:17)
  • Why is each transaction broadcast twice in the Bitcoin network? (54:29)
  • Why are OP_MUL and OP_DIV disabled in Bitcoin? (56:57)
  • Why are hashSequence and hashPrevouts computed separately? (58:56)
  • Why does Miniscript add an extra size check for hash preimage comparisons? (59:52)
  • How can the next block fee be less than the mempool purging fee rate? (1:00:51)

Releases and release candidates

  • Bitcoin Core 25.1 (1:12:00)
  • Bitcoin Core 24.2 (1:12:00)
  • Bitcoin Core 26.0rc1 (1:14:23)

Episoder(184)

Bitcoin Optech: Newsletter #390 Recap

Bitcoin Optech: Newsletter #390 Recap

Mark “Murch” Erhardt and Gustavo Flores Echaiz are joined by Liam Eagen to discuss Newsletter #390.News● Argo: a garbled-circuits scheme with more efficient off-chain computation (0:48) ● LN-Symmetry ...

4 Feb 1h 3min

Bitcoin Optech: Newsletter #389 Recap

Bitcoin Optech: Newsletter #389 Recap

Mark “Murch” Erhardt and Mike Schmidt are joined by René Pickhardt to discuss ⁠Newsletter #389⁠.News● A mathematical theory of payment channel networks (0:31) Changes to services and client software● ...

27 Jan 53min

Bitcoin Optech: Newsletter #388 Recap

Bitcoin Optech: Newsletter #388 Recap

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Bruno Garcia to discuss ⁠Newsletter #388⁠.News● An overview of incremental mutation testing in Bitcoin Core (0:43) ● BIP pro...

20 Jan 58min

Bitcoin Optech: Newsletter #387 Recap

Bitcoin Optech: Newsletter #387 Recap

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by René Pickhardt and Craig Raw to discuss ⁠Newsletter #387⁠.News● Bitcoin Core wallet migration bug (0:55) ● Using Ark as a ch...

14 Jan 1h 24min

Bitcoin Optech: Newsletter #386 Recap

Bitcoin Optech: Newsletter #386 Recap

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Anthony Towns and Mikhail Kudinov to discuss ⁠Newsletter #386⁠.News● Building a vault using blinded co-signers (1:04:09) ● P...

6 Jan 2h 2min

Bitcoin Optech: Newsletter #385: 2025 Year-in-Review Special Recap

Bitcoin Optech: Newsletter #385: 2025 Year-in-Review Special Recap

Mark “Murch” Erhardt and Mike Schmidt are joined by Bastien Teinturier, Rearden Code, and Pieter Wuille to discuss Newsletter #385: 2025 Year-in-Review Special.January● Updated ChillDKG draft (43:08) ...

24 Des 20253h 42min

Bitcoin Optech: Newsletter #384 Recap

Bitcoin Optech: Newsletter #384 Recap

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Matt Morehouse and Salvatore Ingala to discuss ⁠Newsletter #384⁠.News● Critical vulnerabilities fixed in LND 0.19.0 (0:59) ●...

16 Des 20251h 12min

Bitcoin Optech: Newsletter #383 Recap

Bitcoin Optech: Newsletter #383 Recap

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Moonsettler and Julian to discuss Newsletter #383.News● Consensus bug in NBitcoin library (1:04) Changing consensus● LNHANCE...

9 Des 20251h 20min

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