Bitcoin Optech Podcast

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 (31:35)

Bitcoin Core PR Review Club

● Separate UTXO set access from validation functions (43:05)

Releases and release candidates

● Core Lightning 25.05rc1 (58:25)

● LND 0.19.1-beta (58:38)

Notable code and documentation changes

● Bitcoin Core #32406 (19:54)

● LDK #3793 (1:14:21)

● LDK #3792 (1:14:59)

● LND #9127 (1:18:38)

● LND #9858 (1:20:04)

● BOLTs #1243 (1:21:49)

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)

Releases and release candidates

● Core Lightning 25.05rc1 (1:07:45)

● LND 0.19.1-beta.rc1 (1:08:02)

Notable code and documentation changes

● Bitcoin Core #32582 (1:09:08)

● Bitcoin Core #31375 (1:07:45)

● BIPs #1483 (1:14:16)

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 node not receiving incoming connections? (48:25)

● How do I configure my node to filter out transactions larger than 400 bytes? (49:44)

● What does not publicly routable node in Bitcoin Core P2P mean? (52:21)

● Why would a node would ever relay a transaction? (52:46)

● Is selfish mining still an option with compact blocks and FIBRE? (55:00)

Releases and release candidates

● Core Lightning 25.05rc1 (57:25)

● LDK 0.1.3 (57:56)

Notable code and documentation changes

● Bitcoin Core #31622 (1:00:32)

● Eclair #3065 (37:15)

● LDK #3796 (1:03:04)

● BIPs #1760 (1:03:40)

● BIPs #1850 (1:06:13)

● BIPs #1793 (1:09:05)

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 documented (26:39)

● Bitkey code open sourced (27:59)

Releases and release candidates

● LND 0.19.0-beta (33:43)

● Core Lightning 25.05rc1 (40:12)

Notable code and documentation changes

● Bitcoin Core #32423 (46:47)

● Bitcoin Core #31444 (49:51)

● Core Lightning #8140 (52:08)

● Core Lightning #8136 (54:16)

● Core Lightning #8266 (55:52)

● Core Lightning #8021 (58:38)

● Core Lightning #8226 (1:01:29)

● LND #9801 (1:02:54)

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 from `OP_CTV` and `OP_CSFS` (36:39)

Releases and release candidates

● LND 0.19.0-beta.rc4 (1:07:28)

Notable code and documentation changes

● Bitcoin Core #32155 (1:08:27)

● Bitcoin Core #28710 (1:09:38)

● Core Lightning #8272 (1:13:28)

● LND #8330 (1:14:09)

● Rust Bitcoin #4458 (1:14:52)

● BIPs #1848 (1:04:33)

● BIPs #1841 (1:16:25)

● BIPs #1821 (1:16:42)

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 Lightning #8227 (45:18)

● Core Lightning #8162 (46:43)

● Core Lightning #8166 (47:44)

● Core Lightning #8237 (48:49)

● LDK #3700 (49:28)

● Rust Bitcoin #4387 (49:55)

● BIPs #1835 (50:15)

● BIPs #1800 (55:03)

● BOLTs #1245 (56:37)

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 #1555 (1:10:34)

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 created? (41:17)

● Non-LN explanation of pay-to-anchor? (43:29)

● Up-to-date statistics about chain reorganizations? (48:08)

● Are Lightning channels always P2WSH? (52:33)

● Child-pays-for-parent as a defense against a double spend? (53:40)

● What values does CHECKTEMPLATEVERIFY hash? (59:06)

● Why can't Lightning nodes opt to reveal channel balances for better routing efficiency? (59:32)

● Does post-quantum require hard fork or soft fork? (1:02:27)

Releases and release candidates

● LND 0.19.0-beta.rc3 (1:07:39)

Notable code and documentation changes

● Bitcoin Core #31247 (1:07:58)

● LDK #3601 (1:10:14)

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 released (21:20)

● Versioned Storage Service announced (22:25)

● Fuzz testing tool for Bitcoin nodes (1:17)

● Bitcoin Control Board components open-sourced (23:50)

Releases and release candidates

● Bitcoin Core 29.0 (25:13)

● LND 0.19.0-beta.rc2 (34:41)

Notable code and documentation changes

● LDK #3593 (35:04)

● BOLTs #1242 (35:57)

Correction (37:38)

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 (48:14)

● Bitcoin Core 29.0rc3 (49:25)

● LND 0.19.0-beta.rc2 (51:21)

Notable code and documentation changes

● LDK #2256 (53:52)

● LND #9669 (56:16)

● Rust Bitcoin #4302 (57:24)