Bitcoin Optech Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Josh Doman and Gloria Zhao to discuss  ⁠Newsletter #362⁠ . News ● Compressed descriptors (0:34) Bitcoin Core PR Review Club ● Improve TxOrphanage denial of service bounds (9:14) Releases and release candidates ● LND v0.19.2-beta.rc2 (46:22) Notable code and documentation changes ● Core Lightning #8377 (47:17) ● BDK #1957 (50:41) ● BIPs #1888 (51:...

Sanket Kanjalkar, Jonas Nick, Tadge Dryja, Steven Roose, and Brandon Black join Mark “Murch” Erhardt and Mike Schmidt to discuss  Newsletter #361 . News ● Separating onion message relay from HTLC relay (2:06) Changing consensus ● CTV+CSFS advantages for PTLCs (5:45) ● Vault output script descriptor (15:21) ● Continued discussion about CTV+CSFS advantages for BitVM (22:57) ● Open letter about CTV a...

Mark “Murch” Erhardt and Mike Schmidt are joined by Daniela Brozzoni and Naiyoma to discuss  ⁠Newsletter #360⁠ . News ● Fingerprinting nodes using `addr` messages (1:00) ● Does any software use `H` in descriptors? (29:36) Selected Q&A from Bitcoin Stack Exchange ● Is there any way to block Bitcoin Knots nodes as my peers? (33:42) ● What does OP_CAT do with integers? (42:00) ● Async Block Relay...

Mark “Murch” Erhardt and Mike Schmidt are joined by Bryan Bishop, Robin Linus, and Rene Pickhardt to discuss  ⁠Newsletter #359⁠ . News ● Proposal to restrict access to Bitcoin Core Project discussion (1:11) ● Improvements to BitVM-style contracts (21:17) ● Channel rebalancing research (41:57) Changes to services and client software ● Cove v1.0.0 released (1:03:58) ● Liana v11.0 released (1:04:59)...

Mark “Murch” Erhardt and Mike Schmidt are joined by Antoine Poinsot, Peter Todd, Josh Doman, and TheCharlatan to discuss  ⁠Newsletter #358⁠ . News ● Calculating the selfish mining danger threshold (0:52) ● Relay censorship resistance through top mempool set reconciliation (59:26) ● Updating BIP390 to allow duplicate participant keys in `musig()` expressions (55:50) ● Descriptor encryption library...

Mark “Murch” Erhardt and Mike Schmidt are joined by Jose SK, Clara Shikhelman, Vojtěch Strnad, Robin Linus, and Dan Gould to discuss  ⁠Newsletter #357⁠ . News ● Syncing full nodes without witnesses (1:30) Changing consensus ● Quantum computing report (17:38) ● Transaction weight limit with exception to prevent confiscation (41:49) ● Removing outputs from the UTXO set based on value and time (53:47...

Mark “Murch” Erhardt and Mike Schmidt are joined by Carla Kirk-Cohen, Joost Jager, and Elias Rohrer to discuss  Newsletter #356 . News ● Do attributable failures reduce LN privacy? (0:57) Selected Q&A from Bitcoin Stack Exchange ● Which transactions get into blockreconstructionextratxn? (40:40) ● Why would anyone use OP_RETURN over inscriptions, aside from fees? (46:47) ● Why is my Bitcoin nod...

Dave Harding is joined by Alex Myers and Rodolfo Novak to discuss  Newsletter #355 . Changes to services and client software ● Cake Wallet added payjoin v2 support (2:38) ● Sparrow adds pay-to-anchor features (6:37) ● Safe Wallet 1.3.0 released (8:00) ● COLDCARD Q v1.3.2 released (9:15) ● Transaction batching using payjoin (19:07) ● JoinMarket Fidelity Bond Simulator (20:46) ● Bitcoin opcodes docu...

Mark “Murch” Erhardt and Mike Schmidt are joined by Eugene Siegel, Chris Stewart, Bram Cohen, and Robin Linus to discuss  Newsletter #353 . News ● Vulnerability disclosure affecting old versions of Bitcoin Core (1:17) Changing consensus ● Proposed BIP for 64-bit arithmetic in Script (5:28) ● Proposed opcodes for enabling recursive covenants through quines (23:11) ● Description of benefits to BitVM...

Mark “Murch” Erhardt and Mike Schmidt are joined by Ruben Somsen, Salvatore Ingala, and Stéphan Vuylsteke to discuss  Newsletter #353 . News ● BIP30 consensus failure vulnerability (0:52) ● Avoiding BIP32 path reuse (28:33) Bitcoin Core PR Review Club ● Add bitcoin wrapper executable (16:38) Releases and release candidates ● LND 0.19.0-beta.rc4 (45:01) Notable code and documentation changes ● Core...

Mark “Murch” Erhardt and Sjors Provoost discuss  Newsletter #352 . News ● Comparison of cluster linearization techniques (0:41) ● Increasing or removing Bitcoin Core's `OP_RETURN` size limit (6:46) Releases and release candidates ● LND 0.19.0-beta.rc3 (1:01:16) Notable code and documentation changes ● Bitcoin Core #31250 (1:02:10) ● Eclair #3064 (1:06:02) ● BTCPay Server #6684 (1:07:46) ● BIPs...

Mark “Murch” Erhardt and Mike Schmidt are joined by Jonas Nick and Salvatore Ingala to discuss  Newsletter #351 . News ● Interactive aggregate signatures compatible with secp256k1 (0:50) ● Standardized backup for wallet descriptors (21:34) Selected Q&A from Bitcoin Stack Exchange ● Practicality of half-aggregated schnorr signatures? (17:16) ● What's the largest size OP_RETURN payload ever...

Mark “Murch” Erhardt and Mike Schmidt are joined by Niklas Gögge to discuss  ⁠Newsletter #350⁠ . Changes to services and client software ● Bitcoin Knots version 28.1.knots20250305 released (11:26) ● PSBTv2 explorer announced (13:51) ● LNbits v1.0.0 released (14:38) ● The Mempool Open Source Project® v3.2.0 released (15:22) ● Coinbase MPC library released (17:25) ● Lightning Network liquidity tool...

Mark “Murch” Erhardt and Dave Harding are joined by Sebastian Falbesoner, Ruben Somsen, and Abubakar Sadiq Ismail to discuss  ⁠Newsletter #349⁠ . News ● SwiftSync speedup for initial block download (0:34) Bitcoin Core PR Review Club ● Add Fee rate Forecaster Manager (29:33) Releases and release candidates ● Core Lightning 25.02.1 (46:54) ● Core Lightning 24.11.2 (47:03) ● BTCPay Server 2.1.0 (48:1...

Mark “Murch” Erhardt and Mike Schmidt are joined by Jonas Nick, Jameson Lopp, Steven Roose, Gregory Sanders, and Salvatore Ingala to discuss  ⁠Newsletter #348⁠ . News ● Educational and experimental-based secp256k1 implementation (1:09) Changing consensus ● Should vulnerable bitcoins be destroyed? (9:17) ● Securely proving UTXO ownership by revealing a SHA256 preimage (34:52) ● Draft BIP for destro...

Mark “Murch” Erhardt and Mike Schmidt are joined by Sjors Provoost and Antoine Poinsot to discuss  ⁠Newsletter #347⁠ . News ● LN upfront and hold fees using burnable outputs (0:54) ● Discussion of testnets 3 and 4 (5:11) ● Plan to relay certain taproot annexes (19:01) Selected Q&A from Bitcoin Stack Exchange ● Why is the witness commitment optional? (24:58) ● Can all consensus valid 64 byte tr...

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:...

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) Relea...

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 mark...

Dave Harding and Mike Schmidt discuss  Newsletter #343 .

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 release...

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...

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 linea...

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 bl...

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 a...