Bitcoin Optech: Newsletter #401 Recap

Bitcoin Optech: Newsletter #401 Recap

From Bitcoin Optech Podcast by Bitcoin Optech

April 22, 2026 · 1h 13m

About this episode

The episode discusses the highlights of Bitcoin Optech Newsletter #401, including updates on MuSig2, software releases, and notable code changes.

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Remix7531 and Luis Schwab to discuss Newsletter #401 . News ● Discussion of using nested MuSig2 in the Lightning Network (34:05) ● Formal verification of secp256k1 modular scalar multiplication (01:10) Changes to services and client software ● Coldcard 6.5.0 adds MuSig2 and miniscript (40:56) ● Frigate 1.4.0 released (41:46) ● Bitcoin Backbone updates (47:10) ● Utreexod 0.5 released (16:18) ● Floresta 0.9.0 released (19:41) Releases and release candidates ● Bitcoin Core 31.0rc4 (48:01) ● Core Lightning 26.04rc3 (49:00) Notable code and documentation changes ● Bitcoin Core #34401 (50:01) ● Bitcoin Core #35032 (51:51) ● Core Lightning #9021 (55:33) ● Core Lightning #9046 (56:53) ● LDK #4515 (58:25) ● LDK #4558 (59:51) ● LND #9985 (1:01:53) ● BTCPay Server #7250 (1:04:07) ● BIPs #2089 (1:07:28)

People in this episode

Hosts: Mark “Murch” Erhardt, Gustavo Flores Echaiz, Mike Schmidt

Guests: Remix7531, Luis Schwab

Topics covered

  • Bitcoin
  • Lightning Network
  • MuSig2
  • Coldcard
  • Software Releases
  • Formal Verification
  • Bitcoin Core

Keywords

  • MuSig2
  • Lightning Network
  • Bitcoin Core
  • Coldcard
  • Software Updates
  • Formal Verification
  • BIPs

Mentioned in this episode

Organizations: Coldcard, Frigate, Bitcoin Backbone, Utreexod, Floresta, Bitcoin Core, Core Lightning, LDK, LND, BTCPay Server

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