Bitcoin Optech Podcast

Mark “Murch” Erhardt and Mike Schmidt are joined by Peter Todd and Henrik Skogstrøm to discuss Newsletter #265 . News Fraud proofs for outdated backup state (1:20) Changes to services and client software Scaling Lightning call for feedback (18:07) Torq v1.0 released (30:31) Blixt Wallet v0.6.8 released (36:03) Sparrow 1.7.8 released (37:19) Open source ASIC miner bitaxeUltra prototype (38:21) FROS...

Mark “Murch” Erhardt and Mike Schmidt are joined by Brandon Black and Dan Gould to discuss  Newsletter #264 . News Adding expiration metadata to silent payment addresses (0:51) Serverless payjoin (14:28) Field Report: Implementing MuSig2 (33:10) Releases and release candidates Core Lightning 23.08rc2 (44:40) Notable code and documentation changes Bitcoin Core #27213 (45:46) Bitcoin Core #28008 (50...

Mark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding, Clara Shikhelman, Peter Todd, Josie Baker, and Eduardo Quintana to discuss Newsletter #263 . Action items Severe Libbitcoin Bitcoin Explorer vulnerability (1:25) News Denial-of-Service (DoS) protection design philosophy (12:00) HTLC endorsement testing and data collection (18:40) Proposed changes to Bitcoin Core default relay policy...

Mark “Murch” Erhardt and Mike Schmidt are joined by Tom Trevethan, Lisa Neigut, and Dusty Daemon to discuss  Newsletter #262 . News Transcripts of periodic LN specification meetings (1:13) Safety of blind MuSig2 signing (5:07) Releases and release candidates BTCPay Server 1.11.1 (24:30) Notable code and documentation changes Bitcoin Core #26467 (25:31) Core Lightning #6378 (27:19) Core Lightning #...

Mark “Murch” Erhardt and Mike Schmidt are joined by Greg Sanders and Bastien Teinturier to discuss  Newsletter #261 . News Simplified LN closing protocol (1:03) LN Summit notes (10:48) Selected Q&A from Bitcoin Stack Exchange How can I manually (on paper) calculate a Bitcoin public key from a private key? (57:18) Why are there 17 native segwit versions? (59:43) Does `0 OP_CSV` force the spendi...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Rearden Code, Ken Sedgwick, and Jack Ronaldi to discuss  Newsletter #260 . Waiting for confirmation #10: Get Involved (2:01) Changes to services and client software Wallet 10101 beta testing pooling funds between LN and DLCs (14:56) LDK Node announced (17:14) Payjoin SDK announced (20:09) Validating Lightning Signer (VLS) beta announ...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Bastien Teinturier, and Martin Zumsande to discuss  Newsletter #259 . News LN specification clean up proposed (0:58) Waiting for confirmation #9: Policy Proposals (18:59) Bitcoin Core PR Review Club Stop relaying non-mempool txs (41:42) Releases and release candidates LND v0.16.4-beta (50:43) Notable code and documentation changes Bi...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao to discuss  Newsletter #258 . Waiting for confirmation #8: Policy as an Interface (0:30) Releases and release candidates Core Lightning 23.05.2 (10:27) Notable code and documentation changes Bitcoin Core #24914 (22:03) Bitcoin Core #27896 (24:47) Core Lightning #6334 (27:51) BIPs #1452 (31:08) BIPs #1354 (33:55)

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Robin Linus, Dave Harding, and Pavlenex to discuss  Newsletter #257 . News Preventing coinjoin pinning with v3 transaction relay (16:08) Speculatively using hoped-for consensus changes (1:33) Waiting for confirmation #7: Network Resources (24:46) Selected Q&A from Bitcoin Stack Exchange Why do Bitcoin nodes accept blocks that hav...

Mark “Murch” Erhardt and Mike Schmidt are joined by Thomas Voegtlin to discuss  Newsletter #256 . News Proposal to extend BOLT11 invoices to request two payments (1:00) Waiting for confirmation #6: Policy Consistency (19:25) Changes to services and client software Greenlight libraries open sourced (32:01) Tapscript debugger Tapsim (33:25) Bitcoin Keeper 1.0.4 announced (35:09) Lightning wallet Ett...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Ruben Somsen, Josie Baker, Matthew Zipkin, and Joost Jager to discuss  Newsletter #255 . News Discussion about the taproot annex (1:32) Draft BIP for silent payments (22:17) Waiting for confirmation #5: Policy for Protection of Node Resources (41:48) Bitcoin Core PR Review Club Allow inbound whitebind connections to more aggressively...

Dave Harding and Mike Schmidt are joined by Gloria Zhao, Johan Torås Halseth, and Salvatore Ingala to discuss  Newsletter #254 . News Using MATT to replicate CTV and manage joinpools (1:23) Waiting for confirmation #4: Feerate estimation (24:23) Releases and release candidates LND 0.16.3-beta (40:37) Notable code and documentation changes Bitcoin Core #26485 (42:34) Eclair #2642 (44:40) LND #7645...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Burak Keceli, Dave Harding, and Joost Jager to discuss  Newsletter #253 . News Proposal for a managed joinpool protocol (1:46) Transaction relay over Nostr (40:38) Waiting for confirmation #3: Bidding for block space (1:00:02) Selected Q&A from Bitcoin Stack Exchange Testing pruning logic with bitcoind (1:12:38) What's the go...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Robin Linus, and Lukas George to discuss  Newsletter #252 . News State compression with zero-knowledge validity proofs (1:05) Waiting for confirmation #2: Incentives (19:00) Changes to services and client software Passport firmware 2.1.1 released (37:19) MuSig wallet Munstr released (37:40) CLN plugin manager Coffee released (38:49)...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Carla Kirk-Cohen, Severin Bühler, and Dan Gould to discuss  Newsletter #251 . News Testing HTLC endorsement (1:33) Request for feedback on proposed specifications for LSPs (14:52) Challenges with zero-conf channels when dual funding (20:59) Advanced payjoin applications (24:51) Summaries of Bitcoin Core developers in-person meeting (...

Mark “Murch” Erhardt and Mike Schmidt are joined by Larry Ruane and Thomas Hartman to discuss  Newsletter #250 . News Paper about PoWswap protocol (1:36) Releases and release candidates Core Lightning 23.05rc2 (19:17) Bitcoin Core 24.1rc2 (23:05) Bitcoin Core 25.0rc1 (25:35) Bitcoin Core PR Review Club Add getprioritisationmap, delete a mapDeltas entry when delta==0 (26:26) Notable code and docume...

Mark “Murch” Erhardt and Mike Schmidt are joined by Salvatore Ingala, James O’Beirne, Adam Gibson, and Steve Lee to discuss  Newsletter #249 . News Job opportunity for project champions (1:17) MATT-based vaults (12:29) Analysis of signature adaptor security (33:40) Releases and release candidates LND v0.16.2-beta (56:25) Core Lightning 23.05rc2 (57:20) Notable code and documentation changes Bitcoi...

Mark “Murch” Erhardt and Mike Schmidt are joined by Will Clark to discuss  Newsletter #248 . News Proposed removal of BIP35 `mempool` P2P message (0:41) Selected Q&A from Bitcoin Stack Exchange How many sigops are in the invalid block 783426? (15:27) How would an adversary increase the required fee to replace a transaction by up to 500 times? (19:10) Best Practices with Multiple CPFPs & CP...

Dave Harding and Mike Schmidt are joined by Maxim Orlovsky to discuss  Newsletter #247 . News RGB update (1:12) Changes to services and client software Descriptor wallet library adds block explorer (36:02) Stratum v2 reference implementation update announced (38:02) Liana 0.4 released (42:35) Coldcard firmware supports additional sighash flags (46:12) Zeus adds fee bumping features (45:12) Utreexo...

Mark “Murch” Erhardt and Mike Schmidt are joined by Lisa Neigut and Niklas Gögge to discuss  Newsletter #246 . News Splicing specification discussions (1:24) Proposed BIP for transaction terminology (40:49) Bitcoin Core PR Review Club Don’t download witnesses for assumed-valid blocks when running in prune mode (43:42) Releases and release candidates Libsecp256k1 0.3.1 (53:10) BDK 1.0.0-alpha.0 (58...

Mark “Murch” Erhardt and Mike Schmidt are joined by Sergi Delgado Segura to discuss  Newsletter #245 . News Watchtower accountability proofs (0:36) Releases and release candidates LND v0.16.0-beta (21:37) BDK 1.0.0-alpha.0 (22:06) Notable code and documentation changes Core Lightning #5967 (22:59) Eclair #2566 (23:43) LDK #2062 (24:57) LDK #2125 (27:18) BTCPay Server #4826 (27:56) BTCPay Server #4...

Mark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding to discuss Newsletter #244 . News Preventing stranded capital with multiparty channels and channel factories (1:00) Selected Q&A from Bitcoin Stack Exchange Why isn’t the taproot deployment buried in Bitcoin Core? (28:06) What restrictions does the version field in the block header have? (32:23) What is the relation between trans...

Mark “Murch” Erhardt and Mike Schmidt are joined by Alekos Filini to discuss  Newsletter #243 . News No significant news this week was found on the Bitcoin-Dev or Lightning-Dev mailing lists. Changes to services and client software Xapo Bank supports Lightning (1:41) TypeScript library for miniscript descriptors released (3:02) Breez Lightning SDK announced (6:48) PSBT-based exchange OpenOrdex lau...

Mark “Murch” Erhardt and Mike Schmidt are joined by Calvin Kim, James O’Beirne, and Greg Sanders to discuss  Newsletter #242 . News Service bit for Utreexo (1:28) Releases and release candidates Core Lightning v23.02.2 (22:04) Libsecp256k1 0.3.0 (25:47) LND v0.16.0-beta.rc3 (29:01) Notable code and documentation changes Bitcoin Core #25740 (30:01)

Mark “Murch” Erhardt and Mike Schmidt are joined by James O’Beirne and Greg Sanders to discuss Newsletter #241 . News Alternative design for OP_VAULT (0:41) New Optech Podcast (23:29) Bitcoin Core PR Review Club Bitcoin-inquisition: Activation logic for testing consensus changes (24:33) Releases and release candidates Core Lightning 23.02 (38:01) LDK v0.0.114 (40:00) BTCPay 1.8.2 (40:52) LND v0.16...