Bitcoin Optech Podcast

01:29:20

Bitcoin Optech: Newsletter #424 Recap

Bitcoin Optech Podcast ·

2026/10/01

Gustavo Flores Echaiz and Mike Schmidt are joined by Ahmet Kurt and Jan B to discuss Newsletter #424.News● Proposal for a post-quantum Lightning Network (1:10) Selected Q&A from Bitcoin Stack Exchange● What would be a drawback if sum instead of SHA256 of amounts was used in the taproot signature message? (36:18) ● Post-BIP110 fork is it necessary to resync from block 0? (39:32) ● Can a Bitcoin node build a partial UTXO set from only the most recent blocks and use it to validate new transactions

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02:09:53

Bitcoin Optech: Newsletter #423 Recap

Bitcoin Optech Podcast ·

2026/09/22

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Davidson Souza, Eric Price, and PortlandHODL to discuss ⁠Newsletter #423⁠.News● Vardiff controllers that strand slowing miners (23:06) ● Improvements in Utreexo initial block download (1:18) ● New BIP draft for unspendable internal keys (1:17:51) Changes to services and client software● BitBoxApp adds Spark-based Lightning payments (1:24:09) ● Covenants.diy script editor (1:28:40) ● EntropyLab offline key calculator (59:46)

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01:33:22

Bitcoin Optech: Newsletter #422 Recap

Bitcoin Optech Podcast ·

2026/09/15

Mark “Murch” Erhardt and Mike Schmidt are joined by Adam Gibson and Rob Segers to discuss Newsletter #422.News● A protocol for probabilistic coinjoin and covert betting (1:14) ● Update on silent payments light clients (43:26) Releases and release candidates● LDK v0.3-rc1 (1:04:06) ● LDK v0.2.6 (1:05:58) ● BTCPay Server 2.4.4 (1:07:44) Notable code and documentation changes● Bitcoin Core #35949 (1:13:04) ● Bitcoin Core #34931 (1:15:11) ● Bitcoin Core #36048 (1:18:14) ● Bitcoin Core #36123 (1:21:12) ●

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02:28:00

Bitcoin Optech: Newsletter #421 Recap

Bitcoin Optech Podcast ·

2026/09/10

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by average_gary, Erick Cestari, Conduition, and Greg Sanders to discuss Newsletter #421.News● Using silent payments for miner payouts in coinbase transaction (2:19) ● Responsible disclosure of a denial-of-service vulnerability in CLN (27:42) Changing consensus● Continued discussion of PQC output types (54:03) ● DropKick commit/reveal PQC rescue (1:14:08) ● SHRINCS draft BIP (1:35:48) ● BIP448 and CSFS/CTV demos and applications

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01:57:55

Bitcoin Optech: Newsletter #420 Recap

Bitcoin Optech Podcast ·

2026/09/02

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Níckolas Goline, Optout, Abubakar Sadiq Ismail, and Moonsettler to discuss Newsletter #420.Action items● Prepare for an upcoming Core Lightning security release (1:46) News● Discussion on universal opt-in replay protection (53:54) ● HWI repository to enter maintenance mode (1:24:05) ● Request for comments on using block-range filters (19:06) Releases and release candidates● BTCPay Server 2.4.3 (1:28:31) ● Eclair 0.14.2

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02:00:20

Bitcoin Optech: Newsletter #419 Recap

Bitcoin Optech Podcast ·

2026/08/26

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Bastien Teinturier, Salvatore Ingala, and spacebear to discuss Newsletter #419.News● Reorg vulnerability in LND channel closes (1:13) ● Draft BIP for `rawtr()` output script descriptor (1:14:36) Changes to services and client software● Payjoin Dev Kit (rust-payjoin) 1.0.0 released (55:33) ● Silent Payments sender plugin for Electrum (1:21:41) ● Superscalar implementation announced (1:22:34) ● Cofund multisig wallet announced

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01:16:08

Bitcoin Optech: Newsletter #418 Recap

Bitcoin Optech Podcast ·

2026/08/18

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Michael Ford (fanquake) and Martin Zumsande to discuss ⁠Newsletter #418⁠.News● Message transfer failure (33:07) ● Static Bitcoin Core binaries available for testing (1:19) ● Replacing per-peer transaction rate-limiting with global rate limits (18:44) Releases and release candidates● BTCPay Server 2.4.2 (43:16) ● LND v0.21.2-beta (45:45) ● LND v0.20.3-beta (45:45) Notable code and documentation changes● Bitcoin Core #35493

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01:40:09

Bitcoin Optech: Newsletter #417 Recap

Bitcoin Optech Podcast ·

2026/08/12

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Conduition, Ram, and Fabian Jahr to discuss Newsletter #417.News● Draft BIP for stale tip relay (29:26) Changing consensus● CISA for taproot keypath spends (BIP460) (40:38) ● Segwit commitment to post-quantum witness data (57:51) ● PQC output type discussion (1:45) ● Input-triggered transaction expiry (1:03:36) ● Layered quantum recovery of hashed addresses (21:53) ● Segregated Data (SegData) BIP draft (1:08:33) Releases and

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02:06:58

Bitcoin Optech: Newsletter #416 Recap

Bitcoin Optech Podcast ·

2026/08/05

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Rob Hamilton, PortlandHODL, Chandra Pratap, and fabohax to discuss Newsletter #416.Action items● Move funds secured by COLDCARD-generated keys (1:07) News● Wallets generated by COLDCARD at risk of theft (2:18) ● Disclosure of two DoS vulnerabilities in Core Lightning (36:26) ● Proof of concept for a zero-knowledge proof of reserves (49:54) Selected Q&A from Bitcoin Stack Exchange● What is Bitcoin's objective

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01:49:16

Bitcoin Optech: Newsletter #415 Recap

Bitcoin Optech Podcast ·

2026/07/28

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Fabian Jahr, Kruw, and Mojo to discuss ⁠Newsletter #415⁠.News● Draft BIP for full aggregation of BIP340 signatures (1:32) Changes to services and client software● Wasabi Wallet 2.8.0 released (33:11) ● Coinswap v0.2.2 released (46:08) ● Go secp256k1 library announced (1:08:38) ● ASMap dashboard announced (21:06) ● Wavelength alpha released (1:10:01) Releases and release candidates● Core Lightning v26.06.6 (1:13:06) ● Bitcoin

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01:34:23

Bitcoin Optech: Newsletter #414 Recap

Bitcoin Optech Podcast ·

2026/07/21

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Keagan McClelland and Andrew Toth to discuss Newsletter #414.News● Formal verification of the Bitcoin protocol (1:11) Releases and release candidates● Bitcoin Core 30.3 (39:42) ● Bitcoin Core 29.4 (39:43) Notable code and documentation changes● Bitcoin Core #35295 (52:43) ● Bitcoin Core #34897 (1:13:54) ● Bitcoin Core #35406 (1:16:13) ● Bitcoin Core #35380 (1:21:36) ● Bitcoin Core #35568 (1:07:36) ● Bitcoin Core #34538

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00:47:43

Bitcoin Optech: Newsletter #413 Recap

Bitcoin Optech Podcast ·

2026/07/14

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Sjors Provoost to discuss Newsletter #413.News● Using fountain codes for IBD (13:53) Releases and release candidates● Bitcoin Core 31.1 (22:52) ● LND v0.20.2-beta (28:49) Notable code and documentation changes● Bitcoin Core #32489 (31:11) ● Bitcoin Core #32606 (33:59) ● Bitcoin Core #34020 (0:48) ● Core Lightning #9104 (42:55) ● Eclair #3323 (45:11) ● LND #10832 (46:24)

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01:56:40

Bitcoin Optech: Newsletter #412 Recap

Bitcoin Optech Podcast ·

2026/07/08

Mark “Murch” Erhardt and Mike Schmidt are joined by Conduition and Jeremy Rubin to discuss Newsletter #412.Changing consensus● Benchmarking SLH-DSA STARK aggregation (1:05) ● Bird of Prey 2 (BoP-2) non-malleable schnorr and PQ signatures (10:21) ● Lattice-based signatures (19:41) ● Public key recovery for P2MR EC leaves (25:50) ● Aligning privacy incentives in P2MR (30:48) ● Prohibit merkle internal node preimages that encode minimal 64-byte transactions (49:38) ● Triggering EC disabling with a NUMS

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01:56:03

Bitcoin Optech: Newsletter #411 Recap

Bitcoin Optech Podcast ·

2026/07/01

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Nishant Bansal and Matthew Zipkin to discuss Newsletter #411.News● LND zero-timestamp gossip DoS disclosure (1:00) Selected Q&A from Bitcoin Stack Exchange● Is it a bug that `OP_IF` is part of the tapscript opcodes? (34:02) ● Why would forbidding `OP_IF` in tapscript be a problem? (41:11) ● Does a softfork always succeed? (49:17) ● How to set up Bitcoin Core to mine a valid block after the BIP110 activation in August

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01:19:12

Bitcoin Optech: Newsletter #410 Recap

Bitcoin Optech Podcast ·

2026/06/23

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by rkrux, Roland Bewick, and Steven Roose to discuss ⁠Newsletter #410⁠.News● Discussion of removing RBF signaling from wallet transactions (0:57) Changes to services and client software● Sparrow Wallet 2.5.0 adds silent payments receiving (59:55) ● Bark live on Bitcoin mainnet (29:46) ● Arké Ark wallet announced (32:18) ● Noah Ark wallet announced (31:52) ● Alby Hub v1.23.0 released (15:00) ● JoinMarket NG 0.32.0 released

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00:58:42

Bitcoin Optech: Newsletter #409 Recap

Bitcoin Optech Podcast ·

2026/06/17

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Vasil Dimov to discuss Newsletter #409.News● Draft BIP for testnet5 (0:31) Releases and release candidates● LND 0.21.0-beta (17:25) ● Core Lightning 26.06.1 (20:19) Notable code and documentation changes● Bitcoin Core #35410 (21:28) ● Bitcoin Core #34779 (38:00) ● Bitcoin Core #32150 (41:36) ● LDK #4647 (45:14) ● BTCPay Server #7218 (51:34) ● BIPs #2186 (53:07)

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01:39:32

Bitcoin Optech: Newsletter #408 Recap

Bitcoin Optech Podcast ·

2026/06/10

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Pyth and Ademan to discuss Newsletter #408.News● A post-quantum path for BIP324 (37:15) ● Discussion of QR signing payloads for miniscript wallets (1:27) Changing consensus● CTV-only vault proof of concept (13:08) ● Post-quantum Lightning discussion (43:41) ● Quantum attack game theory (47:24) ● BIP54 64-byte transactions and potential legitimate uses (49:15) Releases and release candidates● Core Lightning 26.06 (1:11:15)

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00:52:30

Bitcoin Optech: Newsletter #407 Recap

Bitcoin Optech Podcast ·

2026/06/02

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Chandra Pratap to discuss Newsletter #407.News● Core Lightning assertion DoS disclosure (0:47) ● Bitcoin Core developer meeting transcripts (14:34) Releases and release candidates● Eclair v0.14.0 (20:30) ● Core Lightning 26.06rc2 (23:01) Notable code and documentation changes● Bitcoin Core #33966 (24:14) ● Bitcoin Core #34917 (28:04) ● Bitcoin Core #35017 (30:52) ● BIPs #1944 (35:25) ● BIPs #2108 (36:14) ● Eclair #3192

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01:08:06

Bitcoin Optech: Newsletter #406 Recap

Bitcoin Optech Podcast ·

2026/05/26

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Oliver Gugger and 0xB10C to discuss Newsletter #406.News● Significant updates to BIP322 Generic Signed Message Format (1:17) ● TCP hole punching for Bitcoin nodes behind NATs (17:39) Changes to services and client software● Ibis Wallet announced (40:15) ● LDK Server announced (41:10) ● Mempool.space v3.3.0 released (42:06) ● peer-observer P2P monitoring tooling (32:28) Notable code and documentation changes● Bitcoin Core

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01:05:15

Bitcoin Optech: Newsletter #405 Recap

Bitcoin Optech Podcast ·

2026/05/20

Mark “Murch” Erhardt and Mike Schmidt are joined by Fabian Jahr to discuss ⁠Newsletter #405⁠.News● Bitcoin Core script interpreter remote crash disclosure (22:00) ● BIP proposal for UTXO set sharing over P2P network (0:42) Releases and release candidates● Core Lightning 26.06rc1 (34:58) Notable code and documentation changes● Bitcoin Core #35209 (36:44) ● BIPs #2116 (38:20) ● BIPs #2141 (44:13) ● Core Lightning #9116 (48:35) ● Core Lightning #9110 (50:27) ● LDK #4598 (52:10) ● LDK #4528 (53:30) ●

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