Bitcoin Optech Podcast

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Elias Rohrer, Greg Sanders, Antoine Poinsot, Oleksandr Kurbatov, and Nishant Bansal to discuss ⁠Newsletter #429⁠ . News ● Silent payments for multiparty wallets (41:18) ● CLN self-referential channel announcement DoS disclosure (52:57) ● Bitcoin Core security policy update (24:53) Selected Q&A from Bitcoin Stack Exchan...

Gustavo Flores Echaiz and Brandon Black are joined by Adam Gibson, Vincenzo Palazzo, and João Dias to discuss Newsletter #428 . News ● Trust-minimized exits from a single-issuer layer 2 (1:32) ● Descriptor syntax for hash preimages (18:03) Changes to services and client software ● Ibis Wallet v5.0-beta released (26:31) ● Landfall wallet for Lightning mining payouts (28:57) ● rbitcoin 0.8.0 release...

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Erick Cestari and Adam Gibson to discuss Newsletter #427 . News ● Disclosure of two DoS vulnerabilities fixed in Eclair v0.14.1 (0:53) ● Offchain contracts in Lightning channels (12:57) Releases and release candidates ● Bitcoin Core 32.0rc4 (43:15) Notable code and documentation changes ● Eclair #3396 (49:25) ● Eclair #339...

Gustavo Flores Echaiz is joined by Clara Shikhelman and Elias Rohrer to discuss ⁠Newsletter #426⁠ . News ● Dynamic one-byte message type IDs for BIP324 (45:02) ● Discussion of conventions for tagged hash tags in BIPs (49:04) ● Proposal for onchain, private bitcoin transfers with no consensus changes (1:15) Releases and release candidates ● Bitcoin Core 32.0rc3 (53:34) ● Core Lightning 26.06.9 (54:...

Gustavo Flores Echaiz and Brandon Black are joined by Matt Morehouse to discuss ⁠Newsletter #425⁠ . News ● Disclosure of two DoS vulnerabilities in Eclair (1:01) ● Proposal for wallet label synchronization (15:25) Changing consensus ● Continued discussion of PQC output types (21:36) ● Block-wide signature aggregation via SNARKs (27:17) ● Bounds on chain length with BIP54 time warp fixes (35:19) ●...

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 Bit...

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 Light...

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 #359...

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...

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 blo...

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 plug...

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 v...

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) ● Laye...

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 pro...

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) ● Wav...

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 Cor...

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 #91...

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 in...

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...

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)...

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) ● BTC...

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 transact...

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 Co...

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 (4...

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:...