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PODCAST

Bitcoin Optech Podcast

Join Bitcoin Optech as we discuss Bitcoin and Lightning technology each week and review our newsletters. https://bitcoinops.org/

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All Episodes

01:21:47

Bitcoin Optech: Newsletter #346 Recap

Bitcoin Optech Podcast ·

2025/03/26

Mark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Yong Yu, Alejandro De La Torre, Jan B, and Marco De Leon to discuss ⁠Newsletter #346⁠.News● Discussion of LND's dynamic feerate adjustment system (1:24) Changes to services and client software● Wally 1.4.0 released (17:17) ● Bitcoin Core Config Generator announced (18:05) ● A regtest development environment container (18:55) ● Explora transaction visualization tool (20:17) ● Hashpool v0.1 tagged (21:35) ● DMND launching pooled

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00:54:13

Bitcoin Optech: Newsletter #345 Recap

Bitcoin Optech Podcast ·

2025/03/24

Mark “Murch” Erhardt and Mike Schmidt are joined by Sindura Saraswathi, Christian Kümmerle, and Stéphan Vuylsteke to discuss Newsletter #345.News● P2P traffic analysis (1:35) ● Research into single-path LN pathfinding (6:45) ● Probabilistic payments using different hash functions as an xor function (21:17) Bitcoin Core PR Review Club● Stricter internal handling of invalid blocks (26:12) Releases and release candidates● Eclair v0.12.0 (37:49) Notable code and documentation changes● Bitcoin Core

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01:21:44

Bitcoin Optech: Newsletter #344 Recap

Bitcoin Optech Podcast ·

2025/03/11

Mark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Matt Corallo, and Hunter Beast to discuss Newsletter #344.News● Disclosure of fixed LND vulnerability allowing theft (0:57) ● Discussion about Bitcoin Core's priorities (10:49) Changing consensus● Bitcoin Forking Guide (1:01:11) ● Update on BIP360 pay-to-quantum-resistant-hash (P2QRH) (34:37) ● Private block template marketplace to prevent centralizing MEV (21:06) Releases and release candidates● Core Lightning 25.02 (1:09:57)

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00:54:20

Bitcoin Optech: Newsletter #343 Recap

Bitcoin Optech Podcast ·

2025/03/04

Dave Harding and Mike Schmidt discuss Newsletter #343.

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00:58:38

Bitcoin Optech: Newsletter #342 Recap

Bitcoin Optech Podcast ·

2025/03/03

Dave Harding and Mike Schmidt are joined by Bastien Teinturier and Joost Jager discuss ⁠Newsletter #342⁠.News● Allowing mobile wallets to settle channels without extra UTXOs (0:59) ● Continued discussion about an LN quality of service flag (13:14) Changes to services and client software● Ark Wallet SDK released (40:28) ● Zaprite adds BTCPay Server support (40:57) ● Iris Wallet desktop released (41:21) ● Sparrow 2.1.0 released (41:41) ● Scure-btc-signer 1.6.0 released (42:38) ● Py-bitcoinkernel alpha

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00:59:32

Bitcoin Optech: Newsletter #341 Recap

Bitcoin Optech Podcast ·

2025/02/18

Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #341.News● Continued discussion about probabilistic payments (0:34) ● Continued discussion about ephemeral anchor scripts for LN (7:26) ● Stats on orphan evictions (14:31) ● Updated proposal for updated BIP process (27:08) Bitcoin Core PR Review Club● Cluster mempool: introduce TxGraph (35:43) Releases and release candidates● LND v0.18.5-beta (43:48) ● Bitcoin Inquisition 28.1 (44:10) Notable code and documentation changes● Bitcoin Core #25832

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02:43:04

Bitcoin Optech: Newsletter #340 Recap

Bitcoin Optech Podcast ·

2025/02/14

Mark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Johan Halseth, Pieter Wuille, Sergi Delgado, Bastien Teinturier, Oleksandr Kurbatov, Antoine Poinsot and Bob McElrath to discuss Newsletter #340.News● Channel force closure vulnerability in LDK (2:14) ● Zero-knowledge gossip for LN channel announcements (16:01) ● Discovery of previous research for finding optimal cluster linearization (26:29) ● Erlay update (46:38) ● Tradeoffs in LN ephemeral anchor scripts (1:09:50) ● Emulating

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01:15:58

Bitcoin Optech: Newsletter #339 Recap

Bitcoin Optech Podcast ·

2025/02/07

Mark “Murch” Erhardt and Dave Harding are joined by Matt Morehouse and 0xB10C to discuss Newsletter #339.News● Vulnerability in LDK claim processing (0:47)● Replacement cycling attacks with miner exploitation (17:28)● Updated stats on compact block reconstruction (23:56)Selected Q&A from Bitcoin Stack Exchange● Who uses or wants to use PSBTv2 (BIP370)? (32:38)● In the bitcoin's block genesis, which parts can be filled arbitrarily? (34:41)● Lightning force close detection (36:47)● Is a

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00:49:31

Bitcoin Optech: Newsletter #338 Recap

Bitcoin Optech Podcast ·

2025/01/28

Mark “Murch” Erhardt and Mike Schmidt are joined by Andrew Toth and Dave Harding to discuss ⁠Newsletter #338⁠.News - Draft BIP for unspendable keys in descriptors (0:49) - PSBTv2 integration testing (9:55) - Correction about offchain DLCs (15:25) Changes to services and client software - Bull Bitcoin Mobile Wallet adds payjoin (28:10) - Bitcoin Keeper adds miniscript support (28:52) - Nunchuk adds taproot MuSig2 features (29:26) - Jade Plus signing device announced (32:08) - Coinswap

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00:52:42

Bitcoin Optech: Newsletter #337 Recap

Bitcoin Optech Podcast ·

2025/01/21

Mark “Murch” Erhardt and Mike Schmidt are joined by vnprc to discuss ⁠⁠Newsletter #337⁠⁠.News - Continued discussion about rewarding pool miners with tradeable ecash shares (0:35) - Offchain DLCs (38:32) Releases and release candidates - LDK v0.1 (39:34) Notable code and documentation changes - Eclair #2936 (41:32) - Rust Bitcoin #3792 (42:46) - BDK #1789 (43:42) - BIPs #1687 (46:39) - BIPs #1396 (50:15)

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00:47:06

Bitcoin Optech: Newsletter #336 Recap

Bitcoin Optech Podcast ·

2025/01/14

Mark “Murch” Erhardt and Mike Schmidt are joined by Abubakar Sadiq Ismail, Gregory Sanders, and Daniel Roberts to discuss ⁠Newsletter #336⁠.News Investigating mining pool behavior before fixing a Bitcoin Core bug (1:07) Contract-level relative timelocks (15:04) Multiparty LN-Symmetry variant with penalties for limiting published updates (29:06) Releases and release candidates Bitcoin Core 28.1 (39:54) BDK 0.30.1 (40:45) LDK v0.1.0-beta1 (42:01) Notable code and documentation

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01:37:27

Bitcoin Optech: Newsletter #335 Recap

Bitcoin Optech Podcast ·

2025/01/07

Dave Harding and Mike Schmidt are joined by Yuval Kogman, Jeremy Rubin, and Steve Myers to discuss ⁠Newsletter #335⁠.News Deanonymization attacks against centralized coinjoin (1:39) Updated ChillDKG draft (14:09) Changing consensus CTV enhancement opcodes (18:41) Adjusting difficulty beyond 256 bits (31:52) Transitory soft forks for cleanup soft forks (33:44) Quantum computer upgrade path (48:09) Consensus cleanup timewarp grace period (56:10) Releases and release

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01:59:40

Bitcoin Optech: Newsletter #334: 2024 Year-in-Review...

Bitcoin Optech Podcast ·

2024/12/23

Mark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding, Niklas Gögge, Gloria Zhao, and Rearden to discuss ⁠Newsletter #334: 2024 Year-in-Review Special⁠.January Fee-dependent timelocks (16:18) Optimized contract protocol exits (17:20) LN-Symmetry proof-of-concept implementation (18:22) February Replace by feerate (22:32) Human-readable payment instructions (27:25) Improved ASMap generation (28:09) LN dual funding (32:33) Trustless betting on future feerates

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01:34:25

Bitcoin Optech: Newsletter #333 Recap

Bitcoin Optech Podcast ·

2024/12/18

Mark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding, /dev/fd0, and Gloria Zhao to discuss Newsletter #333.News Vulnerability allowing theft from LN channels with miner assistance (1:11) Deanonymization vulnerability affecting Wasabi and related software (12:00) Insights into channel depletion (18:12) Poll of opinions about covenant proposals (31:14) Incentive-based pseudo-covenants (41:49) Bitcoin Core developer meeting summaries (46:45) Bitcoin Core PR Review

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00:58:18

Bitcoin Optech: Channel Depletion Research Deep Dive...

Bitcoin Optech Podcast ·

2024/12/12

Dave Harding and Mike Schmidt are joined by René Pickhardt and Christian Decker to discuss Pickhardt’s ⁠Lightning Network channel depletion research⁠.Summary of Pickhardt's research (1:01) Why look at wealth distributions? (5:45) What can be learned from depletion? (11:38) Circular rebalancing (13:33) What determines where the spanning tree is? (15:28) Mitigating depletion (20:14) Adjacent channels and their impact (26:39) Multiparty channels, channel factories, and Ark (29:52)

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00:58:25

Bitcoin Optech: Newsletter #332 Recap

Bitcoin Optech Podcast ·

2024/12/10

Mark “Murch” Erhardt and Mike Schmidt are joined by Antoine Riard and Antoine Poinsot to discuss ⁠Newsletter #332⁠. News Transaction censorship vulnerability (0:55) Continued discussion about consensus cleanup soft fork proposal (19:20) Releases and release candidates Eclair v0.11.0 (46:45) LDK v0.0.125 (47:26) Core Lightning 24.11rc3 (47:59) LND 0.18.4-beta.rc1 (48:21) Bitcoin Core 28.1RC1 (48:34) Notable code and documentation changes Bitcoin Core #30708 (49:15) Core

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01:28:39

Bitcoin Optech: Newsletter #331 Recap

Bitcoin Optech Podcast ·

2024/12/09

Mark “Murch” Erhardt and Mike Schmidt are joined by Anthony Towns to discuss ⁠Newsletter #331⁠. News Lisp dialect for Bitcoin scripting (0:48) Selected Q&A from Bitcoin Stack Exchange How does ColliderScript improve Bitcoin and what features does it enable? (43:24) Why do standardness rules limit transaction weight? (48:10) Is the scriptSig spending an PayToAnchor output expected to always be empty? (56:16) What happens to the unused P2A outputs? (57:13) Why doesn't Bitcoin's

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01:32:21

Bitcoin Optech: Newsletter #330 Recap

Bitcoin Optech Podcast ·

2024/11/26

Mark “Murch” Erhardt and Mike Schmidt are joined by ZmnSCPxj, Vojtěch Strnad, Moonsettler, Brandon Black, Ethan Heilman, and Dusty Daemon to discuss Newsletter #330.

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00:13:42

Bitcoin Optech: Newsletter #329 Recap

Bitcoin Optech Podcast ·

2024/11/22

Mark “Murch” Erhardt discusses Newsletter #329.News MAD-based offchain payment resolution (OPR) protocol (0:21) Papers about IP-layer censorship of LN payments (3:10) Releases and release candidates BTCPay Server 2.0.3 (6:21) Notable code and documentation changes Bitcoin Core #30592 (8:29) Bitcoin Core #30930 (9:46) LDK #3283 (11:35) LND #7762 (12:31)

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00:20:45

Bitcoin Optech: Newsletter #328 Recap

Bitcoin Optech Podcast ·

2024/11/22

Mark “Murch” Erhardt and Gregory Sanders discuss Newsletter #328. News Disclosure of a vulnerability affecting Bitcoin Core versions before 25.1 (0:53) Bitcoin Core PR Review Club Ephemeral Dust (6:54) Releases and release candidates Bitcoin Core 27.2 (14:55) Libsecp256k1 0.6.0 (15:40) Notable code and documentation changes LDK #3360 (17:40) LDK #3207 (18:45)

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