Bitcoin Optech: Newsletter #420 Recap

<p>Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Níckolas Goline, Optout, Abubakar Sadiq Ismail, and Moonsettler to discuss <a href="https://bitcoinops.org/en/newsletters/2026/08/28/">Newsletter #420</a>.</p><p><br></p><p><strong>Action items</strong></p><p>● Prepare for an upcoming Core Lightning security release (1:46) </p><p><br></p><p><strong>News</strong></p><p>● Discussion on universal opt-in replay protection (53:54) </p><p>● HWI repository to enter maintenance mode (1:24:05) </p><p>● Request for comments on using block-range filters (19:06) </p><p><br></p><p><strong>Releases and release candidates</strong></p><p>● BTCPay Server 2.4.3 (1:28:31) </p><p>● Eclair 0.14.2 (1:29:09) </p><p><br></p><p><strong>Notable code and documentation changes</strong></p><p>● Bitcoin Core #34075 (31:21) </p><p>● Bitcoin Core #35730 (1:32:02) </p><p>● Bitcoin Core #35580 (1:34:03) </p><p>● Bitcoin Core #35665 (1:38:36) </p><p>● Bitcoin Core #35933 (1:43:02) </p><p>● Core Lightning #9374 (1:45:58) </p><p>● Eclair #3342 (1:47:15) </p><p>● Eclair #3321 (1:48:55) </p><p>● LND #11008 (1:50:44) </p><p>● HWI #841 (1:52:09) </p><p>● HWI #849 (1:53:48) </p><p>● Rust Bitcoin #6755 (1:55:12) </p>