Francesco Madonna and supertestnet joined Optech to discuss Newsletter #376: - Continued discussion of block template sharing - B-SSL a Secure Bitcoin Signing Layer - Bitcoin Core 30.0 - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #376 Recap Podcast

Gustavo Flores Echaiz and Mike Schmidt are joined by Francesco Madonna and supertestnet to discuss Newsletter #376.

Fountain: https://fountain.fm/episode/uYvjTVDINCV7N95sriNu Spotify:

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Bitcoin Optech: Newsletter #376 Recap

Podcast Episode · Bitcoin Optech Podcast · October 28, 2025 · 39m

Sindura Saraswathi, ZmnSCPxj and Eugene Siegel joined Optech to discuss Newsletter #375: - Optimal Threshold Signatures - Flattening certain nested threshold signatures - Theoretical limitations on embedding data in the UTXO set - The ‘Compact block harness’ Bitcoin Core PR Review Club - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #375 Recap Podcast

Gustavo Flores Echaiz and Mike Schmidt are joined by Sindura Saraswathi, ZmnSCPxj, and Eugene Siegel to discuss Newsletter #375.

Fountain: https://fountain.fm/episode/chMU3zQSD9f2tyCuzW4P Spotify:

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Bitcoin Optech: Newsletter #375 Recap

Bitcoin Optech Podcast · Episode

Bitcoin Optech newsletter #376 is here: - shares an update on the proposal for nodes to share their current block template - summarizes a paper outlining a covenant-less vault construction - Bitcoin Core 30.0 release - Optech Newsletter #376 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #376

This week’s newsletter shares an update on the proposal for nodes to share their current block template and summarizes a paper outlining a covena...

Discussion continued around the proposal for full node peers to occasionally send each other their current template for the next block using compact block relay encoding...

Bitcoin Optech

Bitcoin Optech Newsletter #376

This week’s newsletter shares an update on the proposal for nodes to share their current block template and summarizes a paper outlining a covena...

Francesco Madonna posted to Delving Bitcoin about a concept which is a covenant-less vault model using taproot, OP_CHECKSEQUENCEVERIFY, and OP_CHECKLOCKTIMEVERIFY...

Bitcoin Optech

Bitcoin Optech Newsletter #376

This week’s newsletter shares an update on the proposal for nodes to share their current block template and summarizes a paper outlining a covena...

Bitcoin Core 30.0 is the latest version release of the network’s predominant full node. Its release notes describe several significant improvements...

Bitcoin Optech

Bitcoin Optech Newsletter #376

This week’s newsletter shares an update on the proposal for nodes to share their current block template and summarizes a paper outlining a covena...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Bitcoin Optech newsletter #375 is here: - describes research into tradeoffs between usability and security in threshold signatures - summarizes an approach to convert nested threshold signatures into a single-layer signing group - examines the extent to which data could be embedded in the UTXO set under a restrictive set of rules - recaps the "Compact block harness" PR Review Meeting - Optech Newsletter #375 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #375

This week’s newsletter describes research into tradeoffs between usability and security in threshold signatures, summarizes an approach to conver...

Sindura Saraswathi posted research, co-authored by her and Korok Ray, to Delving Bitcoin about determining the optimal threshold for a multisignature scheme...

Bitcoin Optech

Bitcoin Optech Newsletter #375

This week’s newsletter describes research into tradeoffs between usability and security in threshold signatures, summarizes an approach to conver...

ZmnSCPxj posted to Delving Bitcoin to describe how to avoid using nested schnorr signatures in some cases that have not been proven safe...

Bitcoin Optech

Bitcoin Optech Newsletter #375

This week’s newsletter describes research into tradeoffs between usability and security in threshold signatures, summarizes an approach to conver...

Adam “Waxwing” Gibson started a discussion on the mailing list about the extent to which data could be embedded in the UTXO set under a restrictive set of rules for Bitcoin transactions...

Bitcoin Optech

Bitcoin Optech Newsletter #375

This week’s newsletter describes research into tradeoffs between usability and security in threshold signatures, summarizes an approach to conver...

'Compact block harness' is a PR by Crypt-iQ that increases the fuzz test coverage by adding a test harness for the compact block relay logic...

Bitcoin Optech

Bitcoin Optech Newsletter #375

This week’s newsletter describes research into tradeoffs between usability and security in threshold signatures, summarizes an approach to conver...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Mark “Murch” Erhardt and Mike Schmidt are joined by Gustavo Flores Echaiz to discuss Newsletter #374: - The script restoration BIPs - A BDK Wallet release and release candidates from Bitcoin Core and LND - Our weekly notable code segment You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #374 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Gustavo Flores Echaiz to discuss Newsletter #374.

Fountain: https://fountain.fm/episode/bN5DD679k2z2NLqaNvHQ Spotify:

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Bitcoin Optech: Newsletter #374 Recap

Podcast Episode · Bitcoin Optech Podcast · October 7, 2025 · 46m

Matt Morehouse, Daniela Brozzoni, and Gustavo Flores Echaiz joined Optech to discuss Newsletter #373: - Eclair vulnerability - Research into feerate settings - 12 Bitcoin Stack Exchange questions with an OP_RETURN focus - Bitcoin Core 30.1 release candidate and testing guide - And more You can listen on our website:


Bitcoin Optech

Bitcoin Optech Newsletter #373 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Daniela Brozzoni, and Gustavo Flores Echaiz to discuss Newsletter #373.

Fountain:
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Bitcoin Optech: Newsletter #373 Recap

Podcast Episode · Bitcoin Optech Podcast · October 1, 2025 · 1h 45m

ZmnSCPxj and Constantine Doumanidis joined Optech to discuss Newsletter #372: News 16:24 LSP-funded redundant overpayments 1:02 Partitioning and eclipse attacks using BGP interception Changes to services and client software 13:49 Zero-knowledge proof of reserve tool 15:12 Alternative submarine swap protocol proof of concept Releases and release candidates 39:14 Bitcoin Core 30.0rc1 1:16:28 BDK Chain 0.23.2 Notable code and documentation changes 1:17:19 Bitcoin Core #33268 1:18:56 Eclair #3157 1:19:52 LND #9975 1:20:21 LND #9677 1:20:41 LDK #4045 1:21:32 LDK #4049 1:22:18 BDK #1582 1:23:13 BDK #2000 1:24:17 BDK #2028 You can listen on our website:


Bitcoin Optech

Bitcoin Optech Newsletter #372 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by ZmnSCPxj and Constantine Doumanidis to discuss Newsletter #372.

Fountain:
https://fountain.fm/episode/roAtQyqbkVOkZxNBz4z0 Spotify:


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Bitcoin Optech: Newsletter #372 Recap

Podcast Episode · Bitcoin Optech Podcast · September 23, 2025 · 1h 27m

Bitcoin Optech Newsletter #372 is here: - summarizes a proposal to enhance LN redundant overpayments - links to a discussion about potential partitioning attacks against full nodes - summarizes changes to services/client software - Optech Newsletter #372 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #372

This week’s newsletter summarizes a proposal to enhance LN redundant overpayments and links to a discussion about potential partitioning attacks ...

ZmnSCPxj posted to Delving Bitcoin a proposal to allow LSPs to provide the additional funding (liquidity) required for redundant overpayments...

Bitcoin Optech

Bitcoin Optech Newsletter #372

This week’s newsletter summarizes a proposal to enhance LN redundant overpayments and links to a discussion about potential partitioning attacks ...

Developer cedarctic posted to Delving Bitcoin about using flaws in the Border Gateway Protocol (BGP) to prevent full nodes from being able to connect to peers...

Bitcoin Optech

Bitcoin Optech Newsletter #372

This week’s newsletter summarizes a proposal to enhance LN redundant overpayments and links to a discussion about potential partitioning attacks ...

Changes to services and client software: - Zero-knowledge proof of reserve tool - Alternative submarine swap protocol proof of concept

Bitcoin Optech

Bitcoin Optech Newsletter #372

This week’s newsletter summarizes a proposal to enhance LN redundant overpayments and links to a discussion about potential partitioning attacks ...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Jonas Nick and Bastien Teinturier joined Optech to discuss Newsletter #371: News 0:48 Provable Cryptography Workbook Releases and release candidates 10:48 Bitcoin Core 29.1 11:17 Eclair v0.13.0 25:27 Bitcoin Core 30.0rc1 Notable code and documentation changes 33:18 Bitcoin Core #30469 33:18 Eclair #3163 40:27 Eclair #2308 45:18 Eclair #3021 48:08 Eclair #3142 50:30 LDK #4053 58:12 LDK #3886 You can listen on our website:


Bitcoin Optech

Bitcoin Optech Newsletter #371 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Jonas Nick and Bastien Teinturier to discuss Newsletter #371.

Fountain:
https://fountain.fm/episode/FDSWN4dSOtzy7kezMw3G Spotify:


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Bitcoin Optech: Newsletter #371 Recap

Podcast Episode · Bitcoin Optech Podcast · September 16, 2025 · 1h 1m

Bitcoin Optech newsletter #371 is here: - announces the availability of a workbook dedicated to provable cryptography - Bitcoin Core 29.1, Eclair v0.13.0, Bitcoin Core 30.0rc1 - Optech Newsletter #371 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #371

This week’s newsletter announces the availability of a workbook dedicated to provable cryptography. Also included are our regular sections with l...

Jonas Nick posted to Delving Bitcoin to announce a short workbook he created for a four day event to “teach developers the basics of provable cryptography, […] consisting of cryptographic definitions, propositions, proofs and exercises.”

Bitcoin Optech

Bitcoin Optech Newsletter #371

This week’s newsletter announces the availability of a workbook dedicated to provable cryptography. Also included are our regular sections with l...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Russell O’Connor, Olaoluwa Osuntokun, and Jeremy Rubin join Optech to discuss Newsletter #370: Changing consensus 37:56 Details about the design of Simplicity 1:52 Draft BIP for adding elliptic curve operations to tapscript 19:23 Draft BIP for OP_TWEAKADD Releases and release candidates 59:40 Core Lightning v25.09 1:00:24 Bitcoin Core 29.1rc2 Notable code and documentation changes 1:00:55 LDK #3726 1:02:24 LDK #4019 1:03:09 LND #9455 1:04:00 LND #10103 1:05:20 HWI #795 You can listen on our website:


Bitcoin Optech

Bitcoin Optech Newsletter #370 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Russell O’Connor, Olaoluwa Osuntokun, and Jeremy Rubin to discuss Newsletter #370.

Fountain:
https://fountain.fm/episode/6IP69xVggsPJ4dZtShuf Spotify:


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Bitcoin Optech: Newsletter #370 Recap

Podcast Episode · Bitcoin Optech Podcast · September 10, 2025 · 1h 6m

Mark “Murch” Erhardt and Mike Schmidt discussed Newsletter #368: News 0:30 Draft BIP for block template sharing 28:07 Trusted delegation of script evaluation Changes to services and client software 33:07 ZEUS v0.11.3 released 33:25 Rust Utreexo resources 34:11 Peer-observer tooling and call to action 37:22 Bitcoin Core Kernel-based node announced 38:23 SimplicityHL released 39:17 LSP plugin for BTCPay Server 39:42 Proto mining hardware and software announced 40:46 Oracle resolution demo using CSFS 41:11 Relai adds taproot support Releases and release candidates 43:09 LND v0.19.3-beta 43:29 Bitcoin Core 29.1rc1 43:55 Core Lightning v25.09rc2 Notable code and documentation changes 44:33 Bitcoin Core #32896 46:57 Bitcoin Core #33106 1:02:49 Core Lightning #8467 1:03:26 Core Lightning #8354 1:04:07 Eclair #3103 1:04:43 Eclair #3134 1:05:56 LDK #3897

Bitcoin Optech newsletter #370 is here: - details the design of Simplicity - links to a draft BIP for adding elliptic curve operations to tapscript - describes the draft BIP for OP_TWEAKADD - Optech Newsletter #370 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #370

This week’s newsletter includes our regular sections summarizing discussion about changing Bitcoin’s consensus rules, announcing new release an...

Russell O’Connor made three posts so far to Delving Bitcoin about “the philosophy and design of the Simplicity language”...

Bitcoin Optech

Bitcoin Optech Newsletter #370

This week’s newsletter includes our regular sections summarizing discussion about changing Bitcoin’s consensus rules, announcing new release an...

Olaoluwa Osuntokun posted to the Bitcoin-Dev mailing list a link to a draft BIP for adding several opcodes to tapscript that will allow elliptic curve operations to be performed on the script evaluation stack...

Bitcoin Optech

Bitcoin Optech Newsletter #370

This week’s newsletter includes our regular sections summarizing discussion about changing Bitcoin’s consensus rules, announcing new release an...

Jeremy Rubin posted to the Bitcoin-Dev mailing list a link a draft BIP to add OP_TWEAKADD to tapscript...

Bitcoin Optech

Bitcoin Optech Newsletter #370

This week’s newsletter includes our regular sections summarizing discussion about changing Bitcoin’s consensus rules, announcing new release an...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Bruno Garcia and Liam Eagen joined Optech to discuss Newsletter #369: News 24:56 Update on differential fuzzing of Bitcoin and LN implementations 0:58 Garbled locks for accountable computing contracts Selected Q&A from Bitcoin Stack Exchange 39:45 Is it possible to recover a private key from an aggregate public key under strong assumptions? 41:24 Are all taproot addresses vulnerable to quantum computing? 45:20 Why cant we set the chainstate obfuscation key? 52:09 Is it possible to revoke a spending branch after a block height? 53:45 Configure Bitcoin Core to use onion nodes in addition to IPv4 and IPv6 nodes? Releases and release candidates 54:22 Bitcoin Core 29.1rc2 56:45 Core Lightning v25.09rc4 Notable code and documentation changes 57:37 Bitcoin Core #31802 1:04:46 LDK #3979 1:06:19 LND #10102 1:07:04 Rust Bitcoin #4907 You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #369 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Bruno Garcia and Liam Eagen to discuss Newsletter #369.

Fountain: https://fountain.fm/episode/oGMUPbcYR5TSy63a4Zt8 Spotify:

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Bitcoin Optech: Newsletter #369 Recap

Podcast Episode · Bitcoin Optech Podcast · September 2, 2025 · 1h 8m

Bitcoin Optech Newsletter #369 is here: - shares an update on differential fuzzing of Bitcoin and LN implementations - links to a new paper about garbled locks for accountable computing contracts - summarizes popular Q&A from Stack Exchange - Optech Newsletter #369 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #369

This week’s newsletter shares an update on differential fuzzing of Bitcoin and LN implementations and links to a new paper about garbled locks fo...

Bruno Garcia posted to Delving Bitcoin to describe recent progress and accomplishments of bitcoinfuzz, a library and related data for fuzz testing Bitcoin-based software and libraries...

Bitcoin Optech

Bitcoin Optech Newsletter #369

This week’s newsletter shares an update on differential fuzzing of Bitcoin and LN implementations and links to a new paper about garbled locks fo...

Liam Eagen posted to the Bitcoin-Dev mailing list about a paper he’s written about a new mechanism for creating accountable computing contracts but based on garbled circuits...

Bitcoin Optech

Bitcoin Optech Newsletter #369

This week’s newsletter shares an update on differential fuzzing of Bitcoin and LN implementations and links to a new paper about garbled locks fo...

Selected Q&A from Bitcoin Stack Exchange: - Is it possible to recover a private key from an aggregate public key under strong assumptions? - Are all taproot addresses vulnerable to quantum computing? - Why cant we set the chainstate obfuscation key? - Is it possible to revoke a spending branch after a block height? - Configure Bitcoin Core to use onion nodes in addition to IPv4 and IPv6 nodes?

Bitcoin Optech

Bitcoin Optech Newsletter #369

This week’s newsletter shares an update on differential fuzzing of Bitcoin and LN implementations and links to a new paper about garbled locks fo...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Bitcoin Optech Newsletter #368 is here: - summarizes a draft BIP for block template sharing between full nodes - announces a library that allows trusted delegation of script evaluation - summarizes changes to services/client software - Optech Newsletter #368 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #368

This week’s newsletter summarizes a draft BIP for block template sharing between full nodes and announces a library that allows trusted delegatio...

Anthony Towns posted to the Bitcoin-Dev mailing list the draft of a BIP for how nodes can communicate to their peers the transactions they would attempt to mine in their next block...

Bitcoin Optech

Bitcoin Optech Newsletter #368

This week’s newsletter summarizes a draft BIP for block template sharing between full nodes and announces a library that allows trusted delegatio...

Josh Doman posted to Delving Bitcoin about a library he’s written that uses a trusted execution environment (TEE) that will only sign a taproot keypath spend if the transaction containing that spend satisfies a script...

Bitcoin Optech

Bitcoin Optech Newsletter #368

This week’s newsletter summarizes a draft BIP for block template sharing between full nodes and announces a library that allows trusted delegatio...

Changes to services and client software: - ZEUS v0.11.3 released - Rust Utreexo resources - Peer-observer tooling and call to action - Bitcoin Core Kernel-based node announced - SimplicityHL released - LSP plugin for BTCPay Server - Proto mining hardware and software announced - Oracle resolution demo using CSFS - Relai adds taproot support

Bitcoin Optech

Bitcoin Optech Newsletter #368

This week’s newsletter summarizes a draft BIP for block template sharing between full nodes and announces a library that allows trusted delegatio...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Bitcoin Optech Newsletter #367 is here: - LND v0.19.3-beta.rc1 - Bitcoin Core 29.1rc1 - Optech Newsletter #367 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #367

This week’s newsletter includes our regular sections announcing new release candidates and summarizing notable changes to popular Bitcoin infrast...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions!

Riverside Studio

Gloria Zhao and Mike Schmidt were joined by Tadge Dryja and Anthony Towns to discuss Newsletter #366: - Draft BIPs proposed for Utreexo - Continued discussion about lowering the minimum relay feerate - Peer block template sharing to mitigate problems with divergent mempool policies - A watch only wallet PR Review Club - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #366 Recap Podcast

Gloria Zhao and Mike Schmidt are joined by Tadge Dryja and Anthony Towns to discuss Newsletter #366.

Fountain: https://fountain.fm/episode/mb22hz065ESbbtqZvMy6 Spotify:

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Bitcoin Optech: Newsletter #366 Recap

Podcast Episode · Bitcoin Optech Podcast · August 13, 2025 · 1h 44m

David Gumberg, Lauren Shareshian, Jameson Lopp, Steven Roose, and Tim Ruffing joined Optech to discuss Newsletter #365: - Compact block prefilling - Mempool-based fee estimation - Migration from quantum-vulnerable outputs - The OP_TEMPLATEHASH proposal - Proposal to allow longer relative timelocks - Security against quantum computers with taproot as a commitment scheme - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #365 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by David Gumberg, Lauren Shareshian, Jameson Lopp, Steven Roose, and Tim Ruffing to discuss Ne...

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Bitcoin Optech: Newsletter #365 Recap

Podcast Episode · Bitcoin Optech Podcast · August 6, 2025 · 1h 56m

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