Bitcoin Optech Podcast

Mike Schmidt and Gustavo Flores Echaiz are joined by Dusty Daemon to discuss ⁠Newsletter #398⁠.

Selected Q&A from Bitcoin Stack Exchange

● What is meant by Bitcoin doesn't use encryption? (28:44)

● When and why did Bitcoin Script shift to a commit–reveal structure? (30:26)

● Does P2TR-MS (Taproot M-of-N multisig) leak public keys? (31:50)

● Does OP_CHECKSIGFROMSTACK intentionally allow cross-UTXO signature reuse? (33:24)

Releases and release candidates

● Bitcoin Core 28.4 (35:05)

● Core Lightning 26.04rc1 (36:19)

Notable code and documentation changes

● Bitcoin Core #33259 (37:51)

● Bitcoin Core #33414 (39:49)

● Bitcoin Core #34846 (41:38)

● Core Lightning #8450 (13:39)

● Core Lightning #8856 (22:08)

● Eclair #3247 (44:21)

● LDK #4472 (25:00)

● LND #10602 (47:25)

● LND #10481 (49:38)

● BOLTs #1160 (0:51)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Matt Corallo, Gregory Sanders, and Sebastian van Staa to discuss ⁠Newsletter #397⁠.

Changes to services and client software

● Cake Wallet adds Lightning support (1:06:09)

● Sparrow 2.4.0 and 2.4.2 released (1:13:15)

● Blockstream Jade adds Lightning via Liquid (1:15:33)

● Lightning Labs releases agent tools (14:49)

● Tether launches MiningOS (1:17:38)

● FIBRE network relaunched (1:35)

● TUI for Bitcoin Core released (1:19:34)

Releases and release candidates

● Bitcoin Core 31.0rc1 (28:24)

● BTCPay Server 2.3.6 (1:20:55)

Notable code and documentation changes

● Bitcoin Core #31560 (1:21:55)

● Bitcoin Core #31774 (1:23:35)

● Core Lightning #8817 (1:25:12)

● Eclair #3265 (1:27:41)

● LDK #4427 (22:36)

● LDK #4484 (23:45)

● BIPs #1974 (49:52)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Jonathan Harvey-Buschel to discuss ⁠Newsletter #396⁠.

News

● Collision-resistant hash function for Bitcoin Script (0:30)

● Continued discussion of Gossip Observer traffic analysis tool (8:58)

Releases and release candidates

● BDK wallet 3.0.0-rc.1 (28:04)

Notable code and documentation changes

● Bitcoin Core #26988 (30:39)

● Bitcoin Core #34692 (32:22)

● LDK #4304 (33:21)

● LDK #4416 (35:41)

● LND #10089 (38:01)

● Libsecp256k1 #1777 (39:46)

● BIPs #2047 (42:39)

● BOLTs #1316 (46:42)

● BOLTs #1312 (47:26)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Jon McAlpine, Antoine Poinsot, Mike Casey, and Ethan Heilman to discuss Newsletter #395.

News

● A standard for stateless VTXO verification (1:31)

● Draft BIP for expanded `nVersion` nonce space for miners (1:23:45)

Changing consensus

● Extensions to standard tooling for TEMPLATEHASH-CSFS-IK support (13:52)

● Hourglass V2 update (25:40)

● Algorithm agility for Bitcoin (51:15)

● The limitations of cryptographic agility in Bitcoin (1:05:15)

Releases and release candidates

● Bitcoin Core 28.4rc1 (1:36:53)

Notable code and documentation changes

● Bitcoin Core #33616 (1:38:30)

● Bitcoin Core #34616 (1:42:23)

● Eclair #3256 (1:46:20)

● Eclair #3258 (1:48:34)

● Eclair #3255 (1:50:14)

● LDK #4402 (1:52:27)

● LND #10604 (1:53:56)

● BIPs #1699 (1:55:34)

● BIPs #2106 (1:57:30)

● BIPs #2068 (2:01:28)

● BOLTs #1301 (2:04:54)

Mark “Murch” Erhardt and Mike Schmidt are joined by Craig Raw and Fabian Jahr to discuss Newsletter #393.

News

● Draft BIP for output script descriptor annotations (1:25)

Selected Q&A from Bitcoin Stack Exchange

● Is Bitcoin BIP324 v2 P2P transport distinguishable from random traffic? (35:16)

● What if a miner just broadcasts the header and never gives the block? (39:53)

Releases and release candidates

● Bitcoin Core 28.4rc1 (47:27)

● Rust Bitcoin 0.33.0-beta (47:46)

Notable code and documentation changes

● Bitcoin Core #34568 (48:48)

● Bitcoin Core #34184 (50:37)

● Bitcoin Core #24539 (51:57)

● Bitcoin Core #34329 (54:56)

● Bitcoin Core #28792 (15:35)

● Bitcoin Core #32138 (54:56)

● Bitcoin Core #34512 (56:44)

● Core Lightning #8490 (58:16)

● Eclair #3250 (59:07)

● LDK #4373 (59:55)

● BDK #2081 (1:02:13)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Misha Komarov, Erik De Smedt, and arbedout to discuss ⁠Newsletter #393⁠.

News

● Recent OP_RETURN output statistics (45:54)

● Bitcoin PIPEs v2 (1:33)

Changes to services and client software

● Second releases hArk-based Ark software (20:21)

● Amboss announces RailsX (55:35)

● Nunchuk adds silent payment support (56:11)

● Electrum adds submarine swap features (58:08)

● Sigbash v2 announced (33:56)

Releases and release candidates

● BTCPay Server 2.3.5 (1:00:11)

● LND 0.20.1-beta (1:01:43)

Notable code and documentation changes

● Bitcoin Core #33965 (1:02:55)

● Eclair #3248 (1:05:55)

● Eclair #3246 (1:07:08)

● LDK #4335 (1:08:52)

● LDK #4318 (1:14:32)

● LND #10542 (1:15:55)

● BIPs #1670 (1:17:02)

● BOLTs #1236 (1:27:50)

● BOLTs #1289 (1:29:10)

Mark “Murch” Erhardt and Gustavo Flores Echaiz are joined by Sebastian Falbesoner and Oleksandr Kurbatov to discuss ⁠Newsletter #392⁠.

News

● Proposal to limit the number of per-group silent payment recipients (1:13)

● BLISK, Boolean circuit Logic Integrated into the Single Key (26:43)

Releases and release candidates

● Bitcoin Core 29.3 (49:18)

● LDK 0.2.2 (51:16)

● HWI 3.2.0 (52:20)

● Bitcoin Inquisition 29.2 (53:54)

Notable code and documentation changes

● Bitcoin Core #32420 (56:05)

● Core Lightning #8772 (1:02:29)

● LND #10507 (1:03:56)

● LDK #4387 (1:05:48)

● LDK #4355 (1:08:14)

● LDK #4354 (1:09:21)

● LDK #4303 (1:10:52)

● HWI #784 (1:13:10)

● BIPs #2092 (1:15:02)

● BIPs #2004 (1:16:33)

● BIPs #2017 (1:19:44)

● Bitcoin Inquisition #99 (1:26:53)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Toby Sharp, Chris Hyunhum Cho, Jonas Nick, and Antoine Poinsot to discuss ⁠Newsletter #391⁠.

News

● A constant-time parallelized UTXO database (25:40)

● Bithoven: A formally verified, imperative language for Bitcoin Script (44:48)

● Discussion of dust attack mitigations (1:43:33)

Changing consensus

● SHRINCS: 324-byte stateful post-quantum signatures with static backups (1:30)

● Addressing remaining points on BIP54 (1:10:08)

● Falcon post-quantum signature scheme proposal (20:05)

● SLH-DSA verification can compete with ECC (23:28)

Releases and release candidates

● LDK 0.1.9 (1:50:27)

Notable code and documentation changes

● Bitcoin Core #33604 (1:53:10)

● Bitcoin Core #34358 (1:54:58)

● Core Lightning #8824 (1:56:20)

● Eclair #3244 (1:58:17)

● LDK #4263 (2:00:07)

● LDK #4300 (2:01:54)

● LND #10473 (2:03:57)

● Rust Bitcoin #5493 (2:07:36)

Mark “Murch” Erhardt and Gustavo Flores Echaiz are joined by Liam Eagen to discuss Newsletter #390.

News

● Argo: a garbled-circuits scheme with more efficient off-chain computation (0:48)

● LN-Symmetry update (26:05)

Selected Q&A from Bitcoin Stack Exchange

● What is stored in dbcache and with what priority? (34:21)

● Can one do a coinjoin in Shielded CSV? (24:02)

● In Bitcoin Core, how to use Tor for broadcasting new transactions only? (36:47)

● Brassard-Høyer-Tapp (BHT) algorithm and Bitcoin (BIP360) (38:31)

● Why does BitHash alternate sha256 and ripmed160? (39:24)

Releases and release candidates

● Libsecp256k1 0.7.1 (41:09)

Notable code and documentation changes

● Bitcoin Core #33822 (42:59)

● Bitcoin Core #34269 (44:50)

● Core Lightning #8850 (47:38)

● LDK #4349 (49:16)

● Rust Bitcoin #5470 (50:54)

● Rust Bitcoin #5443 (51:26)

● BDK #2037 (52:51)

● BIPs #2076 (55:49)

● BIPs #1500 (59:39)

Mark “Murch” Erhardt and Mike Schmidt are joined by René Pickhardt to discuss ⁠Newsletter #389⁠.

News

● A mathematical theory of payment channel networks (0:31)

Changes to services and client software

● Electrum server for testing silent payments (30:04)

● BDK WASM library (33:28)

Releases and release candidates

● Core Lightning 25.12.1 (35:14)

● LND 0.20.1-beta.rc1 (39:14)

Notable code and documentation changes

● Bitcoin Core #32471 (40:57)

● Bitcoin Core #34146 (42:02)

● Core Lightning #8831 (45:00)

● LDK #4261 (45:35)

● LDK #4152 (46:24)

● LND #10488 (47:42)

● LND #10331 (48:43)

● Rust Bitcoin #5402 (49:06)

● BIPs #1820 (50:39)

● BOLTs #1306 (51:41)

● BLIPs #59 (53:05)