Bitcoin Optech Podcast

Mark “Murch” Erhardt, Dave Harding, and Mike Schmidt discuss  ⁠Newsletter #282: 2023 Year-in-Review Special⁠ . January Bitcoin Inquisition (10:59) Swap-in-potentiam (14:03) BIP329 wallet label export format (19:32) February Ordinals and inscriptions (20:22) Bitcoin Search, ChatBTC, and TL;DR (41:50) Peer storage backups (43:40) LN quality of service (44:10) HTLC endorsement (47:31) Codex32 (48:33)...

Mark “Murch” Erhardt and Dave Harding are joined by Bastien Teinturier and Rodolfo Novak to discuss  Newsletter #281 . News Discussion about griefing liquidity ads (0:46) Changes to services and client software Stratum v2 mining pool launches (15:43) Bitcoin network simulation tool warnet announced (16:31) Payjoin client for Bitcoin Core released (17:30) Call for community block arrival timestamps...

Mark “Murch” Erhardt and Mike Schmidt are joined by Pieter Wuille and Matthew Zipkin to discuss  Newsletter #280 . News Cluster mempool discussion (0:57) Testing with warnet (32:42) Bitcoin Core PR Review Club Testing Bitcoin Core 26.0 Release Candidates (43:18) Releases and release candidates Bitcoin Core 26.0 (45:30) LND 0.17.3-beta.rc1 (57:41) Notable code and documentation changes Bitcoin Core...

Mark “Murch” Erhardt and Mike Schmidt are joined by Lisa Neigut and Bastien Teinturier to discuss  Newsletter #279 . News Update to the liquidity ads specification (1:00) Selected Q&A from Bitcoin Stack Exchange Is the Schnorr digital signature scheme a multisignature interactive scheme, and also not an aggregated non-interactive scheme? (38:49) Is it advisable to operate a release candidate f...

Dave Harding and Mike Schmidt are joined by Bastien Teinturier and Robin Linus to discuss  Newsletter #278 . News Offers-compatible LN addresses (1:20) Changes to services and client software BitMask Wallet 0.6.3 released (17:42) Opcode documentation website announced (20:08) Athena Bitcoin adds Lightning support (21:42) Blixt v0.6.9 released (22:22) Durabit whitepaper announced (23:07) BitStream...

Dave Harding and Mike Schmidt are joined by Gregory Sanders, Antoine Poinsot, and Max Edwards to discuss  Newsletter #277 . News Eliminating malleability from ephemeral anchor spends (1:54) Field Report: A Miniscript Journey (20:17) Releases and release candidates LND 0.17.1-beta (37:27) Bitcoin Core 26.0rc2 (40:05) Core Lightning 23.11rc1 (53:24) Notable code and documentation changes Bitcoin Cor...

Mark “Murch” Erhardt and Mike Schmidt are joined by Johan Torås Halseth and Abubakar Ismail to discuss  Newsletter #276 . News Mailing list hosting (1:05) HTLC aggregation with covenants (5:36) Bitcoin Core PR Review Club Fee Estimator updates from Validation Interface/CScheduler thread (16:47) Releases and release candidates Bitcoin Core 26.0rc2 (26:14) Core Lightning 23.11rc1 (29:26) LND 0.17.1-...

Mark “Murch” Erhardt and Mike Schmidt discuss  ⁠Newsletter #275⁠ . News Continued discussion about scripting changes (0:40) Releases and release candidates LDK 0.0.118 (14:57) Rust Bitcoin 0.31.1 (17:35) Notable code and documentation changes Bitcoin Core #28685 (21:24) Bitcoin Core #28651 (22:34) Bitcoin Core #28565 (24:57) LND #7828 (31:01) LDK #2660 (33:14) BOLTs #1086 (35:02)

Mark “Murch” Erhardt and Mike Schmidt are joined by Bastien Teinturier, Fabian Jahr, Ethan Heilman, and Armin Sabouri to discuss  Newsletter #274 . News Replacement cycling vulnerability against HTLCs (1:40) Bitcoin UTXO set summary hash replacement (24:21) Research into generic covenants with minimal Script language changes (40:02) Proposed BIP for OP_CAT (45:38) Selected Q&A from Bitcoin Sta...

Mark “Murch” Erhardt and Mike Schmidt are joined by Robin Linus and Antoine Poinsot to discuss  ⁠Newsletter #273⁠ . News Security disclosure of issue affecting LN (1:09) Payments contingent on arbitrary computation (8:15) Proposed BIP for MuSig2 fields in PSBTs (26:44) Changes to services and client software BIP-329 Python library released (29:10) LN testing tool Doppler announced (30:19) Coldcard...

Mike Schmidt is joined by Steven Roose and Gloria Zhao to discuss  Newsletter #272 . News Specification for `OP_TXHASH` proposed (1:42) Bitcoin Core PR Review Club util: Type-safe transaction identifiers (18:36) Releases and release candidates LDK 0.0.117 (27:33) BDK 0.29.0 (28:35) Notable code and documentation changes Bitcoin Core #27596 (29:32) Bitcoin Core #28331 (30:38) Bitcoin Core #27609 (3...

Mark “Murch” Erhardt and Mike Schmidt are joined by Gijs van Dam and Dave Harding to discuss  Newsletter #271 . News Secure remote control of LN nodes (1:48) Payment splitting and switching (12:23) Pooled liquidity for LN (34:31) Releases and release candidates LND v0.17.0-beta (55:26) Notable code and documentation changes Eclair #2756 (58:26) LDK #2486 (1:01:33) LDK #2609 (1:02:34)

Mark “Murch” Erhardt and Mike Schmidt are joined by Anthony Towns to discuss  Newsletter #270 . News Using covenants to improve LN scalability (2:07) Selected Q&A from Bitcoin Stack Exchange How did peer discovery work in Bitcoin v0.1? (20:42) Would a series of reorgs cause Bitcoin to break because of the 2-hour block time difference restriction? (22:48) Is there a way to download blocks from...

Mark “Murch” Erhardt and Mike Schmidt are joined by Sergi Delgado Segura to discuss  Newsletter #269 .

Mark “Murch” Erhardt and Mike Schmidt are joined by Olaoluwa Osuntokun, Greg Sanders, and Pieter Wuille to discuss  Newsletter #268 . News Specifications for taproot assets (1:10) LN messaging changes for PTLCs (53:22) Bitcoin Core PR Review Club BIP324 (28:31) Releases and release candidates LND v0.17.0-beta.rc2 (1:18:22) Notable code and documentation changes Bitcoin Core #26567 (1:20:52)

Mark “Murch” Erhardt and Mike Schmidt are joined by Tom Briar and Nick Farrow to discuss  Newsletter #267 . News Bitcoin transaction compression (1:13) Privacy enhanced co-signing (14:43) Releases and release candidates Libsecp256k1 0.4.0 (35:43) LND v0.17.0-beta.rc2 (37:26) Notable code and documentation changes Bitcoin Core #28354 (38:43) LDK #2468 (40:33)

This podcast is a compilation of previous podcast discussions about the  Waiting for confirmation  series on mempool and relay policy. Series coauthors Mark “Murch” Erhardt and Gloria Zhao describe the concepts in the series, discuss with special guests, and take questions from the audience. 1. Why do we have a mempool? (0:50) 2. Incentives (13:10) 3. Bidding for block space (31:19) 4. Feerate est...

Mark “Murch” Erhardt and Mike Schmidt are joined by Matt Corallo, Brandon Black, Gregory Sanders, and James O’Beirne to discuss  Newsletter #266 . News Disclosure of past LN vulnerability related to fake funding (21:11) Covenant mashup using `TXHASH` and `CSFS` (1:30) Selected Q&A from Bitcoin Stack Exchange Is there an economic incentive to switch from P2WPKH to P2TR? (34:44) What is the BIP3...

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...