Keagan McClelland and Andrew Toth joined Optech to discuss Newsletter #414: - Formal verification of the Bitcoin protocol - Bitcoin Core 30.3, Bitcoin Core 29.4 - Parallel input fetching in Bitcoin Core - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #414 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Keagan McClelland and Andrew Toth to discuss Newsletter #414.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #414 Recap • Listen on Fountain

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Keagan McClelland and Andrew Toth to discuss Newsletter #414.News�...

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Bitcoin Optech: Newsletter #414 Recap

Podcast Episode · Bitcoin Optech Podcast · July 21 · 1h 34m

Bitcoin Optech newsletter #414 is here: - describes a new project to apply formal verification to the Bitcoin protocol - Bitcoin Core 30.3, Bitcoin Core 29.4 - Optech Newsletter #414 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #414

This week’s newsletter describes a new project to apply formal verification to the Bitcoin protocol. Also included are our regular sections annou...

Keagan McClelland posted to the Bitcoin-Dev mailing list and Delving Bitcoin about his effort to formally verify the Bitcoin protocol...

Bitcoin Optech

Bitcoin Optech Newsletter #414

This week’s newsletter describes a new project to apply formal verification to the Bitcoin protocol. Also included are our regular sections annou...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Sjors Provoost joined Optech to discuss Newsletter #413: - Using fountain codes for IBD - Bitcoin Core's IPC Mining Interface and Stratum v2 - Bitcoin Core 31.1, LND v0.20.2-beta - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #413 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Sjors Provoost to discuss Newsletter #413.

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Bitcoin Optech: Newsletter #413 Recap

Podcast Episode · Bitcoin Optech Podcast · July 14 · 48m

Bitcoin Optech newsletter #413 is here: - describes research into using fountain codes to allow pruned nodes to contribute to initial block download - Bitcoin Core 31.1, LND v0.20.2-beta - Optech Newsletter #413 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #413

This week’s newsletter describes research into using fountain codes to allow pruned nodes to contribute to initial block download. Also included ...

Lucas Lima posted to Delving Bitcoin about his latest research on using fountain codes to allow pruned nodes to contribute to Initial Block Download (IBD), without significantly increasing their storage requirements...

Bitcoin Optech

Bitcoin Optech Newsletter #413

This week’s newsletter describes research into using fountain codes to allow pruned nodes to contribute to initial block download. Also included ...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Conduition and Jeremy Rubin joined Optech to discuss Newsletter #412: - Benchmarking SLH-DSA STARK aggregation - Bird of Prey 2 (BoP-2) non-malleable schnorr and PQ signatures - Lattice-based signatures - Public key recovery for P2MR EC leaves - Aligning privacy incentives in P2MR - Prohibit merkle internal node preimages that encode minimal 64-byte transactions - Triggering EC disabling with a NUMS point spend or hashrate majority - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #412 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Conduition and Jeremy Rubin to discuss Newsletter #412.

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Bitcoin Optech Podcast • Bitcoin Optech: Newsletter #412 Recap • Listen on Fountain

Mark “Murch” Erhardt and Mike Schmidt are joined by Conduition and Jeremy Rubin to discuss Newsletter #412.Changing consensus● Benchmarking ...

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Bitcoin Optech: Newsletter #412 Recap

Podcast Episode · Bitcoin Optech Podcast · July 8 · 1h 57m

Bitcoin Optech newsletter #412 is here: - links to benchmarking around SLH-DSA STARK aggregation - points to discussion of a paper on constructing hybrid strongly-unforgeable signature schemes - examines lattice-based PQ signatures - describes a proposal for public key recovery for P2MR EC leaves - summarizes a thread on aligning privacy incentives in P2MR - describes and alternative to banning all 64-byte transactions - summarizes a proposal to trigger EC disabling with a NUMS point spend or hashrate majority - Optech Newsletter #412 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

Remix7531 posted to the Bitcoin-Dev mailing list his benchmark results for aggregating many SPHINCS signature verifications into a single STARK proof...

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

Pieter Wuille posted to Delving Bitcoin about a EuroCrypt 2026 paper on constructing hybrid strongly-unforgeable signature schemes from a schnorr-like scheme and an arbitrary post-quantum signature scheme...

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

Nikita Karetnikov posted to Delving Bitcoin and cross-posted to the Bitcoin-Dev mailing list about a Blockstream blog post comparing post-quantum signature families, where lattice-based schemes appear favorable on size and functionality...

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

starius posted to Delving Bitcoin a proposal to add a recoverable elliptic curve (EC) key leaf type to BIP360 (P2MR). The idea is to recover the EC public key from the schnorr signature...

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

Conduition posted to the Bitcoin-Dev mailing list a proposed BIP360 (P2MR) change to require every P2MR control block to include at least one 32-byte merkle authentication path (i.e. ban depth-zero script trees)...

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

Jeremy Rubin posted to the Bitcoin-Dev mailing list a draft BIP proposing an alternative to the consensus cleanup (BIP54) rule making 64-byte witness-stripped transactions consensus-invalid...

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

Pieter Wuille wrote to the Bitcoin-Dev mailing list about codifying the expected future disabling of elliptic curve (EC) spending paths within new post-quantum output types such as BIP360 (P2MR) and P2TRv2...

Bitcoin Optech

Bitcoin Optech Newsletter #412

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

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Nishant Bansal and Matthew Zipkin joined Optech to discuss Newsletter #411: - LND zero-timestamp gossip DoS disclosure - Removal of the libevent library in Bitcoin Core - Selected Q&A from the Bitcoin Stack Exchange - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #411 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Nishant Bansal and Matthew Zipkin to discuss Newsletter #411.

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Bitcoin Optech: Newsletter #411 Recap

Podcast Episode · Bitcoin Optech Podcast · July 1 · 1h 56m

Bitcoin Optech newsletter #411 is here: - describes the responsible disclosure of a denial-of-service vulnerability that affected older versions of LND - summarizes popular Q&A from Stack Exchange - Optech Newsletter #411 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #411

This week’s newsletter describes the responsible disclosure of a denial-of-service vulnerability that affected older versions of LND. Also includ...

Nishant Bansal posted to Delving Bitcoin disclosing a denial-of-service vulnerability he discovered through state-machine fuzzing of LND’s gossip handling...

Bitcoin Optech

Bitcoin Optech Newsletter #411

This week’s newsletter describes the responsible disclosure of a denial-of-service vulnerability that affected older versions of LND. Also includ...

Selected Q&A from Bitcoin Stack Exchange - Is it a bug that OP_IF is part of the tapscript opcodes? - Why would forbidding OP_IF in tapscript be a problem? - Does a softfork always succeed? - How to set up Bitcoin Core to mine a valid block after the BIP110 activation in August 2026? - Are BIP110 blocks on a branch with lower difficulty valid? - What is the story behind Bitcoin test networks? - Why was -datacarriersize redefined in 2022, and why was the 2023 proposal to expand it not merged? - Are chains of 26 unconfirmed transactions prohibited by the wallet in Bitcoin Core 31.0? - Are there changes in Bitcoin Core 29.0 that affect memory usage? - What is Bitcoin Core’s release schedule?

Bitcoin Optech

Bitcoin Optech Newsletter #411

This week’s newsletter describes the responsible disclosure of a denial-of-service vulnerability that affected older versions of LND. Also includ...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

rkrux, Roland Bewick, and Steven Roose joined Optech to discuss Newsletter #410: - Discussion of removing RBF signaling from wallet transactions - Changes to services and client software including Sparrow, Alby, JoinMarket NG, Bark, Arké, Noah - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #410 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by rkrux, Roland Bewick, and Steven Roose to discuss Newsletter #410.

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Bitcoin Optech: Newsletter #410 Recap

Podcast Episode · Bitcoin Optech Podcast · June 23 · 1h 19m

Bitcoin Optech newsletter #410 is here: - summarizes a discussion about wallets removing opt-in replace-by-fee signaling from the transactions they create - summarizes changes to services/client software - Optech Newsletter #410 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #410

This week’s newsletter summarizes a discussion about wallets removing opt-in replace-by-fee signaling from the transactions they create. Also inc...

rkrux posted to the Bitcoin-Dev mailing list proposing that wallets stop signaling opt-in RBF in the transactions they create...

Bitcoin Optech

Bitcoin Optech Newsletter #410

This week’s newsletter summarizes a discussion about wallets removing opt-in replace-by-fee signaling from the transactions they create. Also inc...

Changes to services and client software: - Sparrow Wallet 2.5.0 adds silent payments receiving - Bark live on Bitcoin mainnet - Arké Ark wallet announced - Noah Ark wallet announced - Alby Hub v1.23.0 released - JoinMarket NG 0.32.0 released

Bitcoin Optech

Bitcoin Optech Newsletter #410

This week’s newsletter summarizes a discussion about wallets removing opt-in replace-by-fee signaling from the transactions they create. Also inc...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Vasil Dimov joined Optech to discuss Newsletter #409: - Draft BIP for testnet5 - The bug in private transaction broadcast - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #409 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Vasil Dimov to discuss Newsletter #409.

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Bitcoin Optech: Newsletter #409 Recap

Podcast Episode · Bitcoin Optech Podcast · June 17 · 59m

Bitcoin Optech newsletter #409 is here: - describes a draft BIP to replace the testnet4 test network with a successor - Optech Newsletter #409 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #409

This week’s newsletter describes a draft BIP to replace the testnet4 test network with a successor. Also included are our regular sections announ...

Pol Espinasa posted to the Bitcoin-Dev mailing list a draft BIP, co-authored with Fabian Jahr, to replace testnet4 with testnet5...

Bitcoin Optech

Bitcoin Optech Newsletter #409

This week’s newsletter describes a draft BIP to replace the testnet4 test network with a successor. Also included are our regular sections announ...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Pyth and Ademan joined Optech to discuss Newsletter #408: - Post-quantum BIP324 - QR signing payloads for miniscript wallets - CTV-only vault proof of concept - Post-quantum Lightning discussion - Quantum attack game theory - BIP54 64-byte transactions and potential legitimate uses - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #408 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Pyth and Daniel Roberts (Ademan) to discuss Newsletter #408.

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Bitcoin Optech: Newsletter #408 Recap

Podcast Episode · Bitcoin Optech Podcast · June 10 · 1h 40m

Bitcoin Optech newsletter #408 is here: - summarizes ideas to make BIP324 transport encryption quantum secure - describes a proposal to standardize QR-based signing payloads for miniscript wallets - links to a CTV-only vault proof of concept - outlines points from a post-quantum Lightning thread - summarizes a quantum attack game theory post - points to discussion of 64-byte transactions and potential uses - Optech Newsletter #408 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #408

This week’s newsletter summarizes ideas to make BIP324 transport encryption quantum secure and describes a proposal to standardize QR-based signi...

Olaoluwa Osuntokun posted to the Bitcoin-Dev mailing list his thoughts on possible upgrades needed to make BIP324 quantum secure...

Bitcoin Optech

Bitcoin Optech Newsletter #408

This week’s newsletter summarizes ideas to make BIP324 transport encryption quantum secure and describes a proposal to standardize QR-based signi...

Pyth posted to Delving Bitcoin a proposal to standardize the data payloads exchanged between wallet coordinators and air-gapped signing devices over QR codes when using miniscript-based spending policies...

Bitcoin Optech

Bitcoin Optech Newsletter #408

This week’s newsletter summarizes ideas to make BIP324 transport encryption quantum secure and describes a proposal to standardize QR-based signi...

Ademan announced on Delving Bitcoin the 0.1.0 release of his CTV (BIP119) vault project called MCCV (More Complicated CTV Vault)...

Bitcoin Optech

Bitcoin Optech Newsletter #408

This week’s newsletter summarizes ideas to make BIP324 transport encryption quantum secure and describes a proposal to standardize QR-based signi...

Olaoluwa Osuntokun (roasbeef) posted to Delving Bitcoin a breakdown of how a post-quantum Lightning Network might look...

Bitcoin Optech

Bitcoin Optech Newsletter #408

This week’s newsletter summarizes ideas to make BIP324 transport encryption quantum secure and describes a proposal to standardize QR-based signi...

Jameson Lopp posted to Delving Bitcoin his blog post about the game theory of a quantum attack...

Bitcoin Optech

Bitcoin Optech Newsletter #408

This week’s newsletter summarizes ideas to make BIP324 transport encryption quantum secure and describes a proposal to standardize QR-based signi...

Jeremy Rubin wrote to the Bitcoin-Dev mailing list about potential legitimate uses for 64-byte witness-stripped transactions...

Bitcoin Optech

Bitcoin Optech Newsletter #408

This week’s newsletter summarizes ideas to make BIP324 transport encryption quantum secure and describes a proposal to standardize QR-based signi...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Chandra Pratap joined Optech to discuss Newsletter #407: - Core Lightning assertion DoS disclosure - Bitcoin Core developer meeting transcripts - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #407 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Chandra Pratap to discuss Newsletter #407.

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Bitcoin Optech: Newsletter #407 Recap

Podcast Episode · Bitcoin Optech Podcast · June 2 · 53m

Bitcoin Optech newsletter #407 is here: - announces the responsible disclosure of a vulnerability that allowed a remote peer to crash Core Lightning nodes - links to transcripts from a recent Bitcoin Core developer meeting - Optech Newsletter #407 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #407

This week’s newsletter announces the responsible disclosure of a vulnerability that allowed a remote peer to crash Core Lightning nodes and links...

Chandra Pratap posted to Delving Bitcoin disclosing a denial-of-service vulnerability discovered during a Summer of Bitcoin 2025 internship...

Bitcoin Optech

Bitcoin Optech Newsletter #407

This week’s newsletter announces the responsible disclosure of a vulnerability that allowed a remote peer to crash Core Lightning nodes and links...

Many Bitcoin Core developers met in person in May, and transcripts from the meeting have been published...

Bitcoin Optech

Bitcoin Optech Newsletter #407

This week’s newsletter announces the responsible disclosure of a vulnerability that allowed a remote peer to crash Core Lightning nodes and links...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Oliver Gugger and 0xB10C joined Optech to discuss Newsletter #406: - Updates to BIP322's generic signed message format - TCP hole punching to help Bitcoin nodes behind home routers accept inbound connections - Changes to services and client software including Ibis Wallet, LDK Server, Mempool.space v3.3.0, and peer-observer P2P monitoring tooling - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #406 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Oliver Gugger and 0xB10C to discuss Newsletter #406.

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Bitcoin Optech: Newsletter #406 Recap

Podcast Episode · Bitcoin Optech Podcast · May 26 · 1h 8m

Bitcoin Optech newsletter #406 is here: - links to a discussion of updates to BIP322’s generic signed message format - describes an idea to use TCP hole punching to help Bitcoin nodes behind NATs accept inbound connections - summarizes changes to services/client software - Optech Newsletter #406 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #406

This week’s newsletter links to a discussion of updates to BIP322’s generic signed message format and describes an idea to use TCP hole punchin...

Oliver Gugger posted to the Bitcoin-Dev mailing list about his ideas on how to round out BIP322...

Bitcoin Optech

Bitcoin Optech Newsletter #406

This week’s newsletter links to a discussion of updates to BIP322’s generic signed message format and describes an idea to use TCP hole punchin...

0xB10C posted to Delving Bitcoin about an idea to make more nodes behind a home router NAT accept inbound connections...

Bitcoin Optech

Bitcoin Optech Newsletter #406

This week’s newsletter links to a discussion of updates to BIP322’s generic signed message format and describes an idea to use TCP hole punchin...

Changes to services and client software: - Ibis Wallet announced - LDK Server announced - Mempool.space v3.3.0 released - peer-observer P2P monitoring tooling

Bitcoin Optech

Bitcoin Optech Newsletter #406

This week’s newsletter links to a discussion of updates to BIP322’s generic signed message format and describes an idea to use TCP hole punchin...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.

Fabian Jahr joined Optech to discuss Newsletter #405: - Bitcoin Core script interpreter remote crash disclosure - BIP proposal for UTXO set sharing over P2P network - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #405 Recap Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Fabian Jahr to discuss Newsletter #405.

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Bitcoin Optech: Newsletter #405 Recap

Podcast Episode · Bitcoin Optech Podcast · May 20 · 1h 5m

Bitcoin Optech newsletter #404 is here: - announces the responsible disclosure of a vulnerability that could allow an attacker with sufficient proof-of-work to crash Bitcoin Core nodes - describes a draft BIP proposal for sharing the UTXO set over the P2P network - Optech Newsletter #405 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #405

This week’s newsletter announces the responsible disclosure of a vulnerability that could allow an attacker with sufficient proof-of-work to cras...

Niklas Gögge posted to the Bitcoin-Dev mailing list disclosing CVE-2024-52911, a vulnerability affecting versions of Bitcoin Core after version 0.14.0 and before 29.0...

Bitcoin Optech

Bitcoin Optech Newsletter #405

This week’s newsletter announces the responsible disclosure of a vulnerability that could allow an attacker with sufficient proof-of-work to cras...

Fabian Jahr posted to the Bitcoin-Dev mailing list about a draft BIP for sharing the UTXO set over the P2P layer...

Bitcoin Optech

Bitcoin Optech Newsletter #405

This week’s newsletter announces the responsible disclosure of a vulnerability that could allow an attacker with sufficient proof-of-work to cras...

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.