Bitcoin Optech: Newsletter #424 Recap

<p>Gustavo Flores Echaiz and Mike Schmidt are joined by Ahmet Kurt and Jan B to discuss <a href="https://bitcoinops.org/en/newsletters/2026/09/25/">Newsletter #424</a>.</p><p><br></p><p><strong>News</strong></p><p>● Proposal for a post-quantum Lightning Network (1:10) </p><p><br></p><p><strong>Selected Q&amp;A from Bitcoin Stack Exchange</strong></p><p>● What would be a drawback if sum instead of SHA256 of amounts was used in the taproot signature message? (36:18) </p><p>● Post-BIP110 fork is it necessary to resync from block 0? (39:32) </p><p>● Can a Bitcoin node build a partial UTXO set from only the most recent blocks and use it to validate new transactions? (42:16) </p><p><br></p><p><strong>Releases and release candidates</strong></p><p>● Bitcoin Core 32.0rc2 (21:13) </p><p>● Core Lightning 26.06.8 (45:36) </p><p>● LDK v0.3-rc2 (47:15) </p><p><br></p><p><strong>Notable code and documentation changes</strong></p><p>● Bitcoin Core #34566 (51:31) </p><p>● BIPs #1951 (54:14) </p><p>● BIPs #2224 (57:45) </p><p>● Core Lightning #9507 (1:02:00) </p><p>● Core Lightning #9508 (1:07:35) </p><p>● Core Lightning #9509 (1:12:02) </p><p>● Core Lightning #9510 (1:16:03) </p><p>● Core Lightning #9513 (1:20:01) </p><p>● LND #11198 (1:21:47) </p><p>● LND #11146 (1:24:15) </p><p>● LND #11132 (1:27:20) </p>