Bitcoin Optech

2 Oct 2026

This week’s newsletter summarizes the responsible disclosure of two denial-of-service vulnerabilities affecting older versions of Eclair and describes a proposal for synchronizing wallet labels

29 Sep 2026

Gustavo Flores Echaiz and Mike Schmidt are joined by Ahmet Kurt and Jan B to discuss Newsletter #424.

25 Sep 2026

This week’s newsletter describes a proposal for upgrading the offchain protocols of the Lightning Network to post-quantum security. Also included are our regular sections with selected questions

22 Sep 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Davidson Souza, Eric Price, and PortlandHODL to discuss Newsletter #423.

18 Sep 2026

This week’s newsletter summarizes an analysis of mining pool difficulty controllers stranding slowed miners, describes a proposed improvement to Utreexo’s initial block download, and links to a

15 Sep 2026

Mark “Murch” Erhardt and Mike Schmidt are joined by Adam Gibson and Rob Segers to discuss Newsletter #422.

11 Sep 2026

This week’s newsletter describes a proposed protocol for probabilistic coinjoins disguised as covert bets and summarizes benchmarks of a silent payments indexing server against compact block

8 Sep 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by average_gary, Erick Cestari, Conduition, and Greg Sanders to discuss Newsletter #421.

4 Sep 2026

This week’s newsletter describes an idea for pools to pay miners using silent payments in the coinbase transaction and summarizes the responsible disclosure of a denial-of-service vulnerability

1 Sep 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Níckolas Goline, Optout, Abubakar Sadiq Ismail, and Moonsettler to discuss Newsletter #420.

28 Aug 2026

This week’s newsletter relays advance notice of a planned Core Lightning security release, summarizes a discussion about opt-in replay protection for potential future forks, notes that the Hardware

25 Aug 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Bastien Teinturier, Salvatore Ingala, and spacebear to discuss Newsletter #419.

21 Aug 2026

This week’s newsletter summarizes the disclosure of a fixed reorg vulnerability in LND’s channel closes and describes a draft BIP for the rawtr() output script descriptor. Also included are our

18 Aug 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Michael Ford (fanquake) and Martin Zumsande to discuss Newsletter #418.

14 Aug 2026

This week’s newsletter describes a proposed contract protocol for mitigating Lightning Network channel jamming, reports on the availability of static Bitcoin Core binaries for testing, and

11 Aug 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Conduition, Ram, and Fabian Jahr to discuss Newsletter #417.

7 Aug 2026

This week’s newsletter describes a draft BIP for relaying stale block tips between peers. Also included are our regular sections summarizing proposals and discussion about changing Bitcoin’s

4 Aug 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Rob Hamilton, PortlandHODL, Chandra Pratap, and fabohax to discuss Newsletter #416.

31 Jul 2026

This week’s newsletter warns about a severe vulnerability affecting wallets generated by COLDCARD signing devices, summarizes the disclosure of two denial-of-service vulnerabilities in Core

28 Jul 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Fabian Jahr, Kruw, and Mojo to discuss Newsletter #415.

24 Jul 2026

This week’s newsletter describes a draft BIP for full aggregation of BIP340 signatures. Also included are our regular sections describing recent changes to services and client software, announcing

21 Jul 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Keagan McClelland and Andrew Toth to discuss Newsletter #414.

17 Jul 2026

This week’s newsletter describes a new project to apply formal verification to the Bitcoin protocol. Also included are our regular sections announcing new releases and release candidates, and

14 Jul 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Sjors Provoost to discuss Newsletter #413.

10 Jul 2026

This week’s newsletter describes research into using fountain codes to allow pruned nodes to contribute to initial block download. Also included are our regular sections announcing new releases and

7 Jul 2026

Mark “Murch” Erhardt and Mike Schmidt are joined by Conduition and Jeremy Rubin to discuss Newsletter #412.