Bitcoin Optech: Newsletter #223 Recap

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt discuss ⁠Newsletter #382⁠.News● Stats on compact block reconstructions updates (0:34) ● Motion to activate BIP3 (7:26) Selected Q&A from Bitcoin Stack Exchange● Do pruned nodes store witness inscriptions? (24:27) ● Increasing probability of block hash collisions when difficulty is too high (29:33) ● What is the purpose of the initial 0x04 byte in all extended public and private keys? (33:25) Releases and release candidates● LND v0.20.0-beta (34:57) ● Core Lightning v25.12rc1 (35:57) Notable code and documentation changes● Bitcoin Core #33872 (37:55) ● Bitcoin Core #33629 (42:05) ● Core Lightning #8677 (49:49) ● Core Lightning #8546 (51:28) ● Core Lightning #8682 (53:19) ● LDK #4197 (55:39) ● LDK #4234 (1:00:56) ● LDK #4148 (1:02:17) ● BDK #2027 (1:03:04)

3 Dec 20251h 5min

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Antoine Poinsot and ZmnSCPxj to discuss Newsletter #381.News● Modeling stale rates by propagation delay and mining centralization (1:03) ● Private key handover for collaborative closure (30:55) Changes to services and client software● Arkade launches (52:32) ● Mempool monitoring mobile application (55:25) ● Web-based policy and miniscript IDE (56:25) ● Phoenix Wallet adds taproot channels (57:45) ● Nunchuk 2.0 launches (59:19) ● LN gossip traffic analysis tool announced (1:01:49) Notable code and documentation changes● Bitcoin Core #33745 (1:04:23) ● Core Lightning #8537 (1:09:28) ● Core Lightning #8608 (1:11:26) ● Core Lightning #8646 (1:13:34) ● Core Lightning #8569 (1:17:44) ● Core Lightning #8558 (1:22:46) ● LDK #4126 (1:24:11) ● LDK #4208 (1:26:37) ● LND #9432 (1:27:58) ● BOLTs #1284 (1:31:38) ● BOLTs #1044 (1:33:33)

25 Nov 20251h 36min

Mark “Murch” Erhardt and Mike Schmidt are joined by TheCharlatan to discuss Newsletter #380.Releases and release candidates● LND 0.20.0-beta.rc4 (1:30) Notable code and documentation changes● Bitcoin Core #30595 (2:56) ● Bitcoin Core #33443 (28:03) ● Core Lightning #8656 (29:42) ● Core Lightning #8671 (30:22) ● LDK #4204 (33:09) ● BIPs #2022 (34:45)

18 Nov 202544min

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Sebastian Falbesoner, PortlandHODL, Tadge Dryja, and Antoine Poinsot to discuss Newsletter #379.News● Comparing performance of ECDSA signature validation in OpenSSL vs. libsecp256k1 (1:47) Changing consensus● Multiple discussions about restricting data (14:05) ● Post-quantum signature aggregation (1:00:05) ● Native STARK proof verification in Bitcoin Script (1:18:47) ● BIP54 implementation and test vectors (35:47) Releases and release candidates● Core Lightning 25.09.2 (1:30:54) ● LND 0.20.0-beta.rc3 (1:31:44) Notable code and documentation changes● Bitcoin Core #31645 (1:32:34) ● Core Lightning #8636 (1:40:08) ● Core Lightning #8639 (1:43:18) ● Core Lightning #8635 (1:44:31) ● Eclair #3209 (1:46:25) ● Eclair #3206 (1:46:59) ● Eclair #3210 (1:49:31) ● LDK #4140 (1:54:13) ● LDK #4168 (1:59:12) ● Rust Bitcoin #5116 (2:01:06) ● BTCPay Server #6922 (2:05:05)

12 Nov 20252h 7min

Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #378.News● CPU DoS from unconfirmed transaction processing (1:00) Selected Q&A from Bitcoin Stack Exchange● Why was -datacarriersize redefined in 2022, and why was the 2023 proposal to expand it not merged? (17:53) ● What is the smallest valid transaction that can be included in a block? (22:59) ● Why does Bitcoin Core continue to give witness data a discount even when it is used for inscriptions? (25:38) ● The ever-growing Bitcoin blockchain size? (39:17) ● I read that OP_TEMPLATEHASH is a variant of OP_CTV. How do they differ? (44:59) Releases and release candidates● LND 0.20.0-beta.rc1 (49:59) ● Eclair 0.13.1 (50:43) Notable code and documentation changes● Bitcoin Core #29640 (51:21) ● Core Lightning #8400 (54:15) ● Eclair #3173 (54:53) ● LND #10280 (56:56) ● BIPs #2006 (57:27) ● BIPs #1975 (1:00:58)

4 Nov 20251h 2min

Gustavo Flores Echaiz and Mike Schmidt are joined by Abubakar Sadiq Ismail and Carla Kirk-Cohen to discuss ⁠Newsletter #377⁠.News● Detecting block template feerate increases using cluster mempool (1:06) ● Channel jamming mitigation simulation results and updates (9:28) Changes to services and client software● BULL wallet launches (37:22) ● Sparrow 2.3.0 released (39:40) Releases and release candidates● Core Lightning 25.09.1 (40:47) ● Bitcoin Core 28.3 (41:18) Notable code and documentation changes● Bitcoin Core #33157 (43:00) ● Bitcoin Core #29675 (45:56) ● Bitcoin Core #33517 (46:59) ● Eclair #2792 (49:01) ● LDK #4122 (51:01) ● LND #9868 (52:37) ● LND #10273 (53:48)

29 Okt 202555min

Gustavo Flores Echaiz and Mike Schmidt are joined by Francesco Madonna and supertestnet to discuss Newsletter #376.News● Continued discussion of block template sharing (17:30) ● B-SSL a Secure Bitcoin Signing Layer (2:54) Releases and release candidates● Bitcoin Core 30.0 (22:32) ● Bitcoin Core 29.2 (28:44) ● LDK 0.1.6 (29:37) Notable code and documentation changes● Eclair #3184 (30:59) ● Core Lightning #8597 (32:25) ● LDK #4117 (34:05) ● LDK #4077 (35:03) ● LDK #4154 (36:47)

28 Okt 202538min

Gustavo Flores Echaiz and Mike Schmidt are joined by Sindura Saraswathi, ZmnSCPxj, and Eugene Siegel to discuss ⁠Newsletter #375⁠.News● Optimal Threshold Signatures (1:56) ● Flattening certain nested threshold signatures (14:33) ● Theoretical limitations on embedding data in the UTXO set (38:14) Bitcoin Core PR Review Club● Compact block harness (27:12) Releases and release candidates● Bitcoin Inquisition 29.1 (45:01) Notable code and documentation changes● Bitcoin Core #33453 (47:16) ● Bitcoin Core #33504 (51:52) ● Core Lightning #8563 (53:55) ● Core Lightning #8523 (56:55) ● Core Lightning #8398 (58:22) ● LDK #4120 (59:47) ● LND #10254 (1:01:35)

17 Okt 20251h 2min