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 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.

Bitcoin Optech newsletter #404 is here: - describes possible solutions to node fingerprinting - links to discussion of using public fraud proofs to improve incentives around just-in-time channels - Optech Newsletter #404 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #404

This week’s newsletter describes possible solutions to node fingerprinting and links to discussion of using public fraud proofs to improve incent...

Naiyoma posted to Delving Bitcoin about possible solutions to the node fingerprinting issue that uses the addr message timestamp to identify the same node on multiple networks...

Bitcoin Optech

Bitcoin Optech Newsletter #404

This week’s newsletter describes possible solutions to node fingerprinting and links to discussion of using public fraud proofs to improve incent...

Thomas Voegtlin posted to Delving Bitcoin about a new proposal for improving the game theory behind just-in-time (JIT) channels by using public fraud proofs to demonstrate that an LSP is misbehaving...

Bitcoin Optech

Bitcoin Optech Newsletter #404

This week’s newsletter describes possible solutions to node fingerprinting and links to discussion of using public fraud proofs to improve incent...

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

Toby Sharp joined Optech to discuss Newsletter #402: - Hornet Node's declarative executable specification of Bitcoin consensus rules - Onion message jamming in the Lightning Network - Selected Q&A from the Bitcoin Stack Exchange - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #402 Recap Podcast

Mark “Murch” Erhardt and Gustavo Flores Echaiz are joined by Toby Sharp to discuss Newsletter #402.

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Bitcoin Optech: Newsletter #402 Recap

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

Bitcoin Optech newsletter #403 is here: - describes research around using binary fuse filters as an alternative to the GCS used in compact block filters - links to an idea for post-quantum HD wallets with fallback SPHINCS keys - summarizes discussion of a post-quantum output type - examines a proposal to embed post-quantum keys in tapscript without consensus changes - summarizes results of a BIP54 demonstration of slow blocks on signet - links to work on post-quantum BIP86 recovery using zk-STARK proofs of BIP32 seeds - Optech Newsletter #403 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #403

This week’s newsletter describes research around using binary fuse filters as an alternative to the GCS used in compact block filters. Also inclu...

Csaba Purszki posted to Delving Bitcoin his research on finding a better alternative to Golomb-Rice Coded Sets (GCS) used for compact block filters as defined in BIP158...

Bitcoin Optech

Bitcoin Optech Newsletter #403

This week’s newsletter describes research around using binary fuse filters as an alternative to the GCS used in compact block filters. Also inclu...

In a post on the Bitcoin-Dev mailing list, Conduition described a design for post-quantum BIP32 congruent hierarchical deterministic wallets with fallback SPHINCS keys...

Bitcoin Optech

Bitcoin Optech Newsletter #403

This week’s newsletter describes research around using binary fuse filters as an alternative to the GCS used in compact block filters. Also inclu...

Antoine Poinsot wrote to the Bitcoin-Dev mailing list defending a plain post-quantum output type (as opposed to a P2TR-like output type which allows quantum-vulnerable key spending to be disabled by a later soft fork)...

Bitcoin Optech

Bitcoin Optech Newsletter #403

This week’s newsletter describes research around using binary fuse filters as an alternative to the GCS used in compact block filters. Also inclu...

Daniel Buchner sent a proposal to the Bitcoin-Dev mailing list which describes a potential path to enabling flexible post-quantum wallet designs without fully describing the signature validation parameters...

Bitcoin Optech

Bitcoin Optech Newsletter #403

This week’s newsletter describes research around using binary fuse filters as an alternative to the GCS used in compact block filters. Also inclu...

On Delving Bitcoin, Antoine Poinsot wrote about a demonstration of the types of slow-to-validate blocks that BIP54 (consensus cleanup) prevents...

Bitcoin Optech

Bitcoin Optech Newsletter #403

This week’s newsletter describes research around using binary fuse filters as an alternative to the GCS used in compact block filters. Also inclu...

Olaoluwa Osuntokun (roasbeef) posted on the Bitcoin-Dev mailing list his project to demonstrate zk-STARK recovery of quantum-vulnerable coins secured by keys derived using BIP32...

Bitcoin Optech

Bitcoin Optech Newsletter #403

This week’s newsletter describes research around using binary fuse filters as an alternative to the GCS used in compact block filters. Also inclu...

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

Bitcoin Optech newsletter #402 is here: - describes work on a declarative executable specification of consensus rules - summarizes a discussion about onion message jamming in the Lightning Network - summarizes popular Q&A from Stack Exchange - Optech Newsletter #402 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #402

This week’s newsletter describes Hornet Node’s work on a declarative executable specification of consensus rules and summarizes a discussion ab...

Toby Sharp posted to Delving Bitcoin and the Bitcoin-Dev mailing list an update on the Hornet node project...

Bitcoin Optech

Bitcoin Optech Newsletter #402

This week’s newsletter describes Hornet Node’s work on a declarative executable specification of consensus rules and summarizes a discussion ab...

Erick Cestari posted to Delving Bitcoin about the onion message jamming problem affecting the Lightning Network...

Bitcoin Optech

Bitcoin Optech Newsletter #402

This week’s newsletter describes Hornet Node’s work on a declarative executable specification of consensus rules and summarizes a discussion ab...

Selected Q&A from Bitcoin Stack Exchange - Why did BIP342 replace CHECKMULTISIG with a new opcode, instead of just removing FindAndDelete from it? - Does SIGHASH_ANYPREVOUT commit to the tapleaf hash or the full taproot merkle path? - What does the BIP86 tweak guarantee in a MuSig2 Lightning channel, beyond address format?

Bitcoin Optech

Bitcoin Optech Newsletter #402

This week’s newsletter describes Hornet Node’s work on a declarative executable specification of consensus rules and summarizes a discussion ab...

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

Remix7531 and Luis Schwab joined Optech to discuss Newsletter #401: - Nested MuSig2 for k-of-n multisignature Lightning nodes - Formal verification of secp256k1 modular scalar multiplication - Changes to services and client software including Utreexo software and others - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #401 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Remix7531 and Luis Schwab to discuss Newsletter #401.

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Bitcoin Optech: Newsletter #401 Recap

Podcast Episode · Bitcoin Optech Podcast · April 22 · 1h 13m

Bitcoin Optech newsletter #400 is here: - recaps the "Testing Bitcoin Core 31.0 Release Candidates" PR Review Club meeting - Optech Newsletter #400 Podcast

Bitcoin Optech

Bitcoin Optech Newsletter #400

This week’s newsletter includes our regular sections summarizing a Bitcoin Core PR Review Club meeting and describing notable changes to popular ...

'Testing Bitcoin Core 31.0 Release Candidates' was a review club meeting that did not review a particular PR, but rather was a group testing effort. Before each major Bitcoin Core release, extensive testing by the community is considered essential. For this reason, a volunteer writes a testing guide for a release candidate so that as many people as possible can productively test without having to independently ascertain what’s new or changed in the release, and reinvent the various setup steps to test these features or changes...

Bitcoin Optech

Bitcoin Optech Newsletter #400

This week’s newsletter includes our regular sections summarizing a Bitcoin Core PR Review Club meeting and describing notable changes to popular ...

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

Matt Corallo, Gregory Sanders, and Sebastian van Staa joined Optech to discuss Newsletter #397: - Changes to services and client software including items about FIBRE, L402, and others - The Bitcoin Core 31.0rc1 testing guide - OP_TEMPLATEHASH and Taproot-native (Re)bindable Transactions - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #397 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Matt Corallo, Gregory Sanders, and Sebastian van Staa to discuss Ne...

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Bitcoin Optech: Newsletter #397 Recap

Podcast Episode · Bitcoin Optech Podcast · March 24 · 1h 30m

Jon McAlpine, Antoine Poinsot, Mike Casey, and Ethan Heilman joined Optech to discuss Newsletter #395: - A standard for stateless VTXO verification - Draft BIP for expanded nVersion nonce space for miners - Extensions to standard tooling for TEMPLATEHASH-CSFS-IK support - Hourglass V2 update - Algorithm agility for Bitcoin - The limitations of cryptographic agility in Bitcoin - And more You can listen on our website:

Bitcoin Optech

Bitcoin Optech Newsletter #395 Recap Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Jon McAlpine, Antoine Poinsot, Mike Casey, and Ethan Heilman to dis...

Fountain: https://fountain.fm/episode/662j7DIN0bkqLa4UPCyQ Spotify:

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Bitcoin Optech Podcast · Episode

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Bitcoin Optech: Newsletter #395 Recap

Podcast Episode · Bitcoin Optech Podcast · March 11 · 2h 8m