Bitcoin Optech newsletter #366 is here: - announces draft BIPs for Utreexo - summarizes continued discussion about lowering the minimum transaction relay feerate - describes a proposal to allow nodes to share their block templates to mitigate problems with divergent mempool policies - recaps the "Add exportwatchonlywallet RPC to export a watchonly version of a wallet" PR Review Meeting - includes a recommendation to readers - issues a correction to last week’s newsletter - Optech Newsletter #366 Podcast

David Gumberg, Lauren Shareshian, Jameson Lopp (@lopp), Steven Roose (@stevenroose3), and Tim Ruffing (@real_or_random) joined Optech to discuss Newsletter #365: News 1:13:00 Testing compact block prefilling 1:33:53 Mempool-based fee estimation library Changing consensus 49:17 Migration from quantum-vulnerable outputs 1:13 Taproot-native `OP_TEMPLATEHASH` proposal 12:57 Proposal to allow longer relative timelocks 23:48 Security against quantum computers with taproot as a commitment scheme Releases and release candidates 1:46:55 Bitcoin Core 29.1rc1 Notable code and documentation changes 1:48:12 Bitcoin Core #29954 1:49:13 Bitcoin Core #33004 1:52:37 LDK #3246 1:53:35 LDK #3892 1:54:31 LDK #3662

Matt Morehouse and Jesse Posner (@jesseposner) joined Optech to discuss Newsletter #364: News 0:53 LND gossip filter DoS vulnerability 15:16 Chain code withholding for multisig scripts 38:46 Research indicates common Bitcoin primitives are compatible with quantum-resistant signature algorithms Selected Q&A from Bitcoin Stack Exchange 57:36 How does Bitcoin Core handle reorgs larger than 10 blocks? 1:01:29 Advantages of a signing device over an encrypted drive? 1:03:21 Spending a taproot output through the keypath and scriptpath? Releases and release candidates 1:04:26 Libsecp256k1 v0.7.0 Notable code and documentation changes 1:05:16 Bitcoin Core #32521 1:15:00 Bitcoin Core #31829 1:19:51 LDK #3801 1:21:11 LDK #3842 1:21:57 BIPs #1890 1:23:53 BOLTs #1232

Bitcoin Optech newsletter #364 is here: - summarizes a vulnerability affecting old versions of LND - describes an idea for improving privacy when using co-signer services - examines the impact of switching to quantum-resistant signature algorithms on HD wallets, scriptless multisig, and silent payments - summarizes popular Q&A from Stack Exchange - Optech Newsletter #364 Recap

Welcome to our live show!

Josh Doman (@joshdoman_) and Gloria Zhao (@glozow) joined Optech to discuss ⁠⁠Newsletter #362⁠⁠: News 0:34 Compressed descriptors Bitcoin Core PR Review Club 9:14 Improve TxOrphanage denial of service bounds Releases and release candidates 46:22 LND v0.19.2-beta.rc2 Notable code and documentation changes 47:17 Core Lightning #8377 50:41 BDK #1957 51:18 BIPs #1888

Bitcoin Optech newsletter #362 is here: - briefly describes a new library allowing output script descriptors to be compressed for use in QR codes - recaps the "Improve TxOrphanage denial of service bounds" PR Review Meeting - #362 Recap Podcast

Sanket Kanjalkar, Jonas Nick, Tadge Dryja, Steven Roose, and Brandon Black joined Optech this week News 2:06 Separating onion message relay from HTLC relay Changing consensus 5:45 CTV+CSFS advantages for PTLCs 15:21 Vault output script descriptor 22:57 Continued discussion about CTV+CSFS advantages for BitVM 27:59 Open letter about CTV and CSFS 1:12:27 OP_CAT enables Winternitz signatures 1:22:46 Commit/reveal function for post-quantum recovery 1:53:31 OP_TXHASH variant with support for transaction sponsorship Notable code and documentation changes 2:13:29 Bitcoin Core #32540 2:14:47 Bitcoin Core #32638 2:15:25 Bitcoin Core #32819 2:17:41 LDK #3618

Sanket Kanjalkar (@sanket1729), Jonas Nick (@n1ckler), Tadge Dryja (@tdryja), Steven Roose (@stevenroose3), and Brandon Black (@reardencode) joined Optech this week to discuss: - A new onion message network - CTV+CSFS and benefits to PTLCs and BitVM - Vault descriptors - The CTV and CSFS open letter - Winternitz signatures using OP_CAT - Commit/reveal function for post-quantum recovery - OP_TXHASH variant with support for transaction sponsorship - And more

Welcome to our live show!