Bitcoin Optech: Newsletter #254 Recap

Mark “Murch” Erhardt and Mike Schmidt are joined by Gustavo Flores Echaiz to discuss Newsletter #374.Changing consensus● Draft BIPs for Script Restoration (0:40) Releases and release candidates● Bitcoin Core 30.0rc2 (19:19) ● bdk-wallet 2.2.0 (23:39) ● LND v0.20.0-beta.rc1 (24:15) Notable code and documentation changes● Bitcoin Core #33229 (25:03) ● Bitcoin Core #33446 (26:55) ● LDK #3838 (28:11) ● LDK #4098 (30:40) ● LDK #4106 (33:40) ● LDK #4096 (35:43) ● LND #10133 (37:24) ● BDK #2029 (39:08) ● BIPs #1911 (42:15)

7 Okt 202546min

Mark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Daniela Brozzoni, and Gustavo Flores Echaiz to discuss Newsletter #373.News● Eclair vulnerability (18:50) ● Research into feerate settings (0:35) Selected Q&A from Bitcoin Stack Exchange● Implications of OP_RETURN changes in upcoming Bitcoin Core version 30.0? (28:27) ● If OP_RETURN relay limits are ineffective, why remove the safeguard instead of keeping it as a default discouragement? (42:12) ● What are the worst-case stress scenarios from uncapped OP_RETURNs in Bitcoin Core v30? (43:25) ● If OP_RETURN needed more room, why was the 80-byte cap removed instead of being raised to 160? (50:39) ● If arbitrary data is inevitable, does removing OP_RETURN limits shift demand toward more harmful storage methods (like UTXO-inflating addresses)? (59:48) ● If OP_RETURN uncapping doesn’t increase the UTXO set, how does it still contribute to blockchain bloat and centralization pressure? (1:00:17) ● How does uncapping OP_RETURN impact long-term fee-market quality and security budget? (1:02:11) ● Assurance blockchain will not suffer from illegal content with 100KB OP_RETURN? (1:04:34) ● What analysis shows OP_RETURN uncapping won’t harm block propagation or orphan risk? (1:05:25) ● Where does Bitcoin Core keep the XOR obfuscation keys for both block data files and level DB indexes? (1:06:10) ● How robust is 1p1c transaction relay in bitcoin core 28.0? (1:06:34) ● How can I allow getblocktemplate to include sub 1 sat/vbyte transactions? (1:10:37) Releases and release candidates● Bitcoin Core 30.0rc1 (1:13:00) Notable code and documentation changes● Bitcoin Core #33333 (1:15:26) ● Bitcoin Core #28592 (1:18:36) ● Eclair #3171 (1:22:33) ● Eclair #3175 (1:26:41) ● LDK #4064 (1:29:36) ● LDK #4067 (1:31:04) ● LDK #4046 (1:32:43) ● LDK #4083 (1:35:27) ● LND #10189 (1:38:23) ● BIPs #1963 (1:41:17)

1 Okt 20251h 44min

Mark “Murch” Erhardt and Mike Schmidt are joined by ZmnSCPxj and Constantine Doumanidis to discuss Newsletter #372.News● LSP-funded redundant overpayments (16:24) ● Partitioning and eclipse attacks using BGP interception (1:02) Changes to services and client software● Zero-knowledge proof of reserve tool (13:49) ● Alternative submarine swap protocol proof of concept (15:12) Releases and release candidates● Bitcoin Core 30.0rc1 (39:14) ● BDK Chain 0.23.2 (1:16:28) Notable code and documentation changes● Bitcoin Core #33268 (1:17:19) ● Eclair #3157 (1:18:56) ● LND #9975 (1:19:52) ● LND #9677 (1:20:21) ● LDK #4045 (1:20:41) ● LDK #4049 (1:20:32) ● BDK #1582 (1:22:18) ● BDK #2000 (1:23:13) ● BDK #2028 (1:24:17)

23 Sep 20251h 26min

Mark “Murch” Erhardt and Mike Schmidt are joined by Jonas Nick and Bastien Teinturier to discuss Newsletter #370.News● Provable Cryptography Workbook (0:48) Releases and release candidates● Bitcoin Core 29.1 (10:48) ● Eclair v0.13.0 (11:17) ● Bitcoin Core 30.0rc1 (25:27) Notable code and documentation changes● Bitcoin Core #30469 (33:18) ● Eclair #3163 (33:18) ● Eclair #2308 (40:27) ● Eclair #3021 (45:18) ● Eclair #3142 (48:08) ● LDK #4053 (50:30) ● LDK #3886 (58:12)

16 Sep 20251h

Mark “Murch” Erhardt and Mike Schmidt are joined by Russell O’Connor, Olaoluwa Osuntokun, and Jeremy Rubin to discuss Newsletter #370.Changing consensus● Details about the design of Simplicity (37:56) ● Draft BIP for adding elliptic curve operations to tapscript (1:52) ● Draft BIP for OP_TWEAKADD (19:23) Releases and release candidates● Core Lightning v25.09 (59:40) ● Bitcoin Core 29.1rc2 (1:00:24) Notable code and documentation changes● LDK #3726 (1:00:55) ● LDK #4019 (1:02:24) ● LND #9455 (1:03:09) ● LND #10103 (1:04:00) ● HWI #795 (1:05:20)

10 Sep 20251h 5min

Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #368.News● Draft BIP for block template sharing (0:30) ● Trusted delegation of script evaluation (28:07) Changes to services and client software● ZEUS v0.11.3 released (33:07) ● Rust Utreexo resources (33:25) ● Peer-observer tooling and call to action (34:11) ● Bitcoin Core Kernel-based node announced (37:22) ● SimplicityHL released (38:23) ● LSP plugin for BTCPay Server (39:17) ● Proto mining hardware and software announced (39:42) ● Oracle resolution demo using CSFS (40:46) ● Relai adds taproot support (41:11) Releases and release candidates● LND v0.19.3-beta (43:09) ● Bitcoin Core 29.1rc1 (43:29) ● Core Lightning v25.09rc2 (43:55) Notable code and documentation changes● Bitcoin Core #32896 (44:33) ● Bitcoin Core #33106 (46:57) ● Core Lightning #8467 (1:02:49) ● Core Lightning #8354 (1:03:26) ● Eclair #3103 (1:04:07) ● Eclair #3134 (1:04:43) ● LDK #3897 (1:05:56)

8 Sep 20251h 7min

Mark “Murch” Erhardt and Mike Schmidt are joined by Bruno Garcia and Liam Eagen to discuss Newsletter #369.News● Update on differential fuzzing of Bitcoin and LN implementations (24:56) ● Garbled locks for accountable computing contracts (0:58) Selected Q&A from Bitcoin Stack Exchange● Is it possible to recover a private key from an aggregate public key under strong assumptions? (39:45) ● Are all taproot addresses vulnerable to quantum computing? (41:24) ● Why cant we set the chainstate obfuscation key? (45:20) ● Is it possible to revoke a spending branch after a block height? (52:09) ● Configure Bitcoin Core to use onion nodes in addition to IPv4 and IPv6 nodes? (53:45) Releases and release candidates● Bitcoin Core 29.1rc2 (54:22) ● Core Lightning v25.09rc4 (56:45) Notable code and documentation changes● Bitcoin Core #31802 (57:37) ● LDK #3979 (1:04:46) ● LND #10102 (1:06:19) ● Rust Bitcoin #4907 (1:07:04)

2 Sep 20251h 8min

Mark “Murch” Erhardt and Mike Schmidt discuss ⁠Newsletter #367⁠.Releases and release candidates● LND v0.19.3-beta.rc1 (0:19) ● Bitcoin Core 29.1rc1 (0:46) Notable code and documentation changes● Bitcoin Core #33050 (2:38) ● Bitcoin Core #32473 (11:04)● Bitcoin Core #33077 (17:57) ● Core Lightning #8389 (22:03)

19 Aug 202523min