Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt discuss Newsletter #382: - Updated stats on compact block reconstructions - A motion to activate BIP3 and replace the current BIP process - 3 questions from the Bitcoin Stack Exchange - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #382 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt discuss Newsletter #382.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #382 Recap • Listen on Fountain

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt discuss ⁠Newsletter #382⁠.News● Stats on compact block reconstructions upd...

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Bitcoin Optech: Newsletter #382 Recap

Podcast Episode · Bitcoin Optech Podcast · 12/03/2025 · 1h 6m

Bitcoin Optech newsletter #382 is here: - provides an update on compact block reconstruction discussions - relays a call to activate BIP3 - summarizes popular Q&A from Stack Exchange - Optech Newsletter #382 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #382

This week’s newsletter provides an update on compact block reconstruction discussions and relays a call to activate BIP3. Also included are our r...

0xB10C posted an update to Delving Bitcoin about his statistics around compact block reconstruction...

Bitcoin Optech

Bitcoin Optech Newsletter #382

This week’s newsletter provides an update on compact block reconstruction discussions and relays a call to activate BIP3. Also included are our r...

Murch posted to the Bitcoin-Dev mailing list a formal motion to activate BIP3...

Bitcoin Optech

Bitcoin Optech Newsletter #382

This week’s newsletter provides an update on compact block reconstruction discussions and relays a call to activate BIP3. Also included are our r...

Selected Q&A from Bitcoin Stack Exchange: - Do pruned nodes store witness inscriptions? - Increasing probability of block hash collisions when difficulty is too high - What is the purpose of the initial 0x04 byte in all extended public and private keys?

Bitcoin Optech

Bitcoin Optech Newsletter #382

This week’s newsletter provides an update on compact block reconstruction discussions and relays a call to activate BIP3. Also included are our r...

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 17:30 UTC. Join us to discuss or ask questions!

Riverside.FM Studio

Antoine Poinsot and ZmnSCPxj joined Optech to discuss Newsletter #381: - Modeling stale rates by propagation delay and mining centralization - Private key handover for collaborative closure - Updates to services and client software - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #381 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Antoine Poinsot and ZmnSCPxj to discuss Newsletter #381.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #381 Recap • Listen on Fountain

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Antoine Poinsot and ZmnSCPxj to discuss Newsletter #381.News● Mo...

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Bitcoin Optech: Newsletter #381 Recap

Podcast Episode · Bitcoin Optech Podcast · 11/25/2025 · 1h 36m

Bitcoin Optech newsletter #381 is here: - looks at an analysis of how block propagation times may affect miner revenue - describes a new approach for resolving protocols where multiple parties share funds - summarizes changes to services/client software - Optech Newsletter #381 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #381

This week’s newsletter looks at an analysis of how block propagation times may affect miner revenue and describes a new approach for resolving pr...

Antoine Poinsot posted to Delving Bitcoin about modeling stale block rates and how block propagation time affects a miner’s revenue as a function of its hashrate...

Bitcoin Optech

Bitcoin Optech Newsletter #381

This week’s newsletter looks at an analysis of how block propagation times may affect miner revenue and describes a new approach for resolving pr...

ZmnSCPxj posted to Delving Bitcoin about private key handover, an optimization that protocols can implement when funds, previously owned by two parties, need to be refunded to a single entity...

Bitcoin Optech

Bitcoin Optech Newsletter #381

This week’s newsletter looks at an analysis of how block propagation times may affect miner revenue and describes a new approach for resolving pr...

Changes to services and client software: - Arkade launches - Mempool monitoring mobile application - Web-based policy and miniscript IDE - Phoenix Wallet adds taproot channels - Nunchuk 2.0 launches - LN gossip traffic analysis tool announced

Bitcoin Optech

Bitcoin Optech Newsletter #381

This week’s newsletter looks at an analysis of how block propagation times may affect miner revenue and describes a new approach for resolving pr...

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.FM Studio

TheCharlatan joined Optech to discuss Newsletter #380: - The Bitcoin Kernel - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #380 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by TheCharlatan to discuss Newsletter #380.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #380 Recap • Listen on Fountain

Mark “Murch” Erhardt and Mike Schmidt are joined by TheCharlatan to discuss Newsletter #380.Releases and release candidates● LND 0.20.0-beta...

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Bitcoin Optech: Newsletter #380 Recap

Podcast Episode · Bitcoin Optech Podcast · 11/18/2025 · 44m

Sebastian Falbesoner, PortlandHODL, Tadge Dryja, and Antoine Poinsot joined Optech to discuss Newsletter #379: - ECDSA signature validation in OpenSSL vs. libsecp256k1 - Multiple discussions about restricting data - Post-quantum signature aggregation - Native STARK proof verification in Bitcoin Script - BIP54 implementation and test vectors - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #379 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Sebastian Falbesoner, PortlandHODL, Tadge Dryja, and Antoine Poinso...

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #379 Recap • Listen on Fountain

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Sebastian Falbesoner, PortlandHODL, Tadge Dryja, and Antoine Poinso...

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Bitcoin Optech: Newsletter #379 Recap

Podcast Episode · Bitcoin Optech Podcast · 11/12/2025 · 2h 7m

Bitcoin Optech newsletter #379 is here: - shares an analysis comparing the historical performance of the OpenSSL and libsecp256k1 libraries - highlights multiple discussions about restricting data - summarizes a proposed post-quantum signature aggregation opcode - summarizes an idea for STARK proof verification in Bitcoin Script - updates progress on BIP54's consensus cleanup - Optech Newsletter #379 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #379

This week’s newsletter shares an analysis comparing the historical performance of the OpenSSL and libsecp256k1 libraries. Also included are our r...

Sebastian Falbesoner posted to Delving about comparing the performance of ECDSA signature validation between OpenSSL and libsecp256k1 over the last decade...

Bitcoin Optech

Bitcoin Optech Newsletter #379

This week’s newsletter shares an analysis comparing the historical performance of the OpenSSL and libsecp256k1 libraries. Also included are our r...

Multiple conversations examined ideas to change the limits of various fields in consensus...

Bitcoin Optech

Bitcoin Optech Newsletter #379

This week’s newsletter shares an analysis comparing the historical performance of the OpenSSL and libsecp256k1 libraries. Also included are our r...

Tadge Dryja posted to the Bitcoin-Dev mailing list a proposal for an OP_CHECKINPUTVERIFY (OP_CIV) opcode that enables a locking script to commit to a specific UTXO being spent in the same transaction...

Bitcoin Optech

Bitcoin Optech Newsletter #379

This week’s newsletter shares an analysis comparing the historical performance of the OpenSSL and libsecp256k1 libraries. Also included are our r...

Abdelhamid Bakhta posted to Delving Bitcoin a detailed proposal for a new tapscript opcode OP_STARK_VERIFY which would enable the verification of a specific variant of STARK proof in Bitcoin Script...

Bitcoin Optech

Bitcoin Optech Newsletter #379

This week’s newsletter shares an analysis comparing the historical performance of the OpenSSL and libsecp256k1 libraries. Also included are our r...

Antoine Poinsot posted to the Bitcoin-Dev mailing list an update on his consensus cleanup work on BIP54...

Bitcoin Optech

Bitcoin Optech Newsletter #379

This week’s newsletter shares an analysis comparing the historical performance of the OpenSSL and libsecp256k1 libraries. Also included are our r...

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.FM Studio

Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #378: - Disclosure of four low-severity vulnerabilities in Bitcoin Core - Q&A from Bitcoin Stack Exchange including questions on datacarriersize, OP_TEMPLATEHASH and others - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #378 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #378.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #378 Recap • Listen on Fountain

Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #378.News● CPU DoS from unconfirmed transaction processing (1:00) Selected Q&A from...

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Bitcoin Optech: Newsletter #378 Recap

Podcast Episode · Bitcoin Optech Podcast · 11/04/2025 · 1h 3m

Bitcoin Optech newsletter #378 is here: - announces four vulnerabilities affecting older versions of the Bitcoin Core full node - summarizes popular Q&A from Stack Exchange - Optech Newsletter #378 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #378

This week’s newsletter announces four vulnerabilities affecting older versions of the Bitcoin Core full node. Also included are our regular secti...

Antoine Poinsot recently posted to the Bitcoin-Dev mailing list four Bitcoin Core security advisories for low-severity vulnerabilities that were fixed in Bitcoin Core 30.0...

Bitcoin Optech

Bitcoin Optech Newsletter #378

This week’s newsletter announces four vulnerabilities affecting older versions of the Bitcoin Core full node. Also included are our regular secti...

Selected Q&A from Bitcoin Stack Exchange: - Why was -datacarriersize redefined in 2022, and why was the 2023 proposal to expand it not merged? - What is the smallest valid transaction that can be included in a block? - Why does Bitcoin Core continue to give witness data a discount even when it is used for inscriptions? - The ever-growing Bitcoin blockchain size? - I read that OP_TEMPLATEHASH is a variant of OP_CTV. How do they differ?

Bitcoin Optech

Bitcoin Optech Newsletter #378

This week’s newsletter announces four vulnerabilities affecting older versions of the Bitcoin Core full node. Also included are our regular secti...

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.FM Studio

Abubakar Sadiq Ismail and Carla Kirk-Cohen joined Optech to discuss Newsletter #377: - Detecting block template feerate increases using cluster mempool - Channel jamming mitigation simulation results and updates - BULL wallet launches, Sparrow 2.3.0 released - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #377 Recap Podcast

Gustavo Flores Echaiz and Mike Schmidt are joined by Abubakar Sadiq Ismail and Carla Kirk-Cohen to discuss Newsletter #377.

Fountain:

Fountain

Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #377 Recap • Listen on Fountain

Gustavo Flores Echaiz and Mike Schmidt are joined by Abubakar Sadiq Ismail and Carla Kirk-Cohen to discuss ⁠Newsletter #377⁠.News● Detecting...

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Bitcoin Optech: Newsletter #377 Recap

Podcast Episode · Bitcoin Optech Podcast · 10/29/2025 · 55m

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.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #376 Recap • Listen on Fountain

Gustavo Flores Echaiz and Mike Schmidt are joined by Francesco Madonna and supertestnet to discuss Newsletter #376.News● Continued discussion of...

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Bitcoin Optech: Newsletter #376 Recap

Podcast Episode · Bitcoin Optech Podcast · 10/28/2025 · 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.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #375 Recap • Listen on Fountain

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

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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.FM 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.FM 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.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #374 Recap • Listen on Fountain

Mark “Murch” Erhardt and Mike Schmidt are joined by Gustavo Flores Echaiz to discuss Newsletter #374.Changing consensus● Draft BIPs for Scri...

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Bitcoin Optech: Newsletter #374 Recap

Podcast Episode · Bitcoin Optech Podcast · 10/07/2025 · 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.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #373 Recap • Listen on Fountain

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

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Bitcoin Optech: Newsletter #373 Recap

Podcast Episode · Bitcoin Optech Podcast · 10/01/2025 · 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.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #372 Recap • Listen on Fountain

Mark “Murch” Erhardt and Mike Schmidt are joined by ZmnSCPxj and Constantine Doumanidis to discuss Newsletter #372.News● LSP-funded redundan...

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Bitcoin Optech: Newsletter #372 Recap

Podcast Episode · Bitcoin Optech Podcast · 09/23/2025 · 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.FM 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.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #371 Recap • Listen on Fountain

Mark “Murch” Erhardt and Mike Schmidt are joined by Jonas Nick and Bastien Teinturier to discuss Newsletter #370.News● Provable Cryptography...

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Bitcoin Optech: Newsletter #371 Recap

Podcast Episode · Bitcoin Optech Podcast · 09/16/2025 · 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.FM Studio