Bitcoin Optech: Newsletter #399 Recap

Bitcoin Optech: Newsletter #399 Recap

From Bitcoin Optech Podcast by Bitcoin Optech

April 7, 2026 · 1h 43m

About this episode

The episode discusses the key points from Bitcoin Optech Newsletter #399, including wallet privacy risks and recent Bitcoin Core updates.

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Armin Sabouri, Pyth, Conduition, and Jonas Nick to discuss Newsletter #399 . News ● Wallet fingerprinting risks for payjoin privacy (44:15) ● Draft BIP for a wallet backup metadata format (1:04:26) Changing consensus ● Compact Isogeny PQC can replace HD wallets, key-tweaking, silent payments (24:23) ● Varops budget and tapscript leaf 0xc2 (aka Script Restoration) are BIPs 440 and 441 (1:13:24) ● SHRIMPS: 2.5 KB post-quantum signatures across multiple stateful devices (02:02) Releases and release candidates ● Bitcoin Core 31.0rc2 (1:22:07) ● Core Lightning 26.04rc2 (1:23:32) ● BTCPay Server 2.3.7 (1:24:04) Notable code and documentation changes ● Bitcoin Core #32297 (1:26:29) ● Bitcoin Core #34379 (1:28:54) ● Eclair #3269 (1:30:37) ● LDK #4486 (1:32:59) ● LDK #4428 (1:35:00) ● LND #9982 (1:37:13) ● LND #10063 (1:39:00)

People in this episode

Hosts: Mark “Murch” Erhardt, Mike Schmidt

Guests: Gustavo Flores Echaiz, Armin Sabouri, Jonas Nick

Topics covered

  • wallet fingerprinting risks
  • BIP for wallet backup metadata
  • compact isogeny PQC
  • varops budget
  • post-quantum signatures
  • Bitcoin Core releases
  • code changes

Keywords

  • wallet fingerprinting
  • BIP
  • compact isogeny
  • post-quantum signatures
  • Bitcoin Core
  • Core Lightning
  • BTCPay Server

Mentioned in this episode

Organizations: Pyth, Conduition, Bitcoin Core, Core Lightning, BTCPay Server, Eclair, LDK, LND

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