Bitcoin Optech Podcast
Bitcoin Optech
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Join Bitcoin Optech as we discuss Bitcoin and Lightning technology each week and review our newsletters.
https://bitcoinops.org/
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5 days ago
Bitcoin Optech: Newsletter #269 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Sergi Delgado Segura to discuss Newsletter #269.
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Sep 14, 2023
Bitcoin Optech: Newsletter #268 Recap
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)
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Sep 7, 2023
Bitcoin Optech: Newsletter #267 Recap
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)
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Sep 3, 2023
Bitcoin Optech: Waiting for Confirmation Special
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 estimation (47:27)
5. Policy for Protection of Node Resources (59:04)
6. Policy Consistency (1:09:47)
7. Network Resources (1:21:40)
8. Policy as an Interface (1:48:37)
9. Policy proposals (2:07:00)
10. Get Involved (2:29:15)
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Aug 31, 2023
Bitcoin Optech: Newsletter #266 Recap
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 BIP324 encrypted packet structure? (37:31)
* What is the false positive rate for compact block filters? (39:23)
* What opcodes are part of the MATT proposal? (40:27)
* Is there a well defined last Bitcoin block? (41:40)
* Why are miners setting the locktime in coinbase transactions? (46:10)
* Why doesn't Bitcoin Core use auxiliary randomness when performing Schnorr signatures? (47:40)
Releases and release candidates
* Core Lightning 23.08 (49:21)
* LND v0.17.0-beta.rc1 (50:24)
Notable code and documentation changes
* Bitcoin Core #27460 (51:16)
* LDK #2248 (53:43)
* LDK #2337 (55:00)
* LDK #2411 (1:00:16)
* LDK #2507 (1:04:46)
* LDK #2478 (1:07:22)
* LND #7904 (1:09:07)
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Aug 24, 2023
Bitcoin Optech: Newsletter #265 Recap
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)
* FROST software Frostsnap announced (39:10)
* Libfloresta library announced (42:25)
* Wasabi Wallet 2.0.4 released (51:32)
Releases and release candidates
* Core Lightning 23.08rc3 (43:57)
* HWI 2.3.1 (44:35)
Notable code and documentation changes
* Bitcoin Core #27981 (45:03)
* BOLTs #919 (46:55)
* Rust Bitcoin #1990 (49:21)
* Rust Bitcoin #1962 (50:09)
* BIPs #1485 (50:39)
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Aug 17, 2023
Bitcoin Optech: Newsletter #264 Recap
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 (50:29)
* LDK #2308 (55:15)
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Aug 10, 2023
Bitcoin Optech: Newsletter #263 Recap
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 (28:04)
* Libbitcoin Bitcoin Explorer security disclosure (1:25)
Bitcoin Core PR Review Club
* Silent Payments: Implement BIP352 (53:57)
Releases and release candidates
* BDK 0.28.1 (1:12:41)
Notable code and documentation changes
* Bitcoin Core #27746 (1:13:06)
* Core Lightning #6376 (1:15:51)
* Core Lightning #6466 (1:27:13)
* Core Lightning #6253 (1:29:13)
* Rust Bitcoin #1945 (1:30:01)
* BOLTs #759 (1:32:21)
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Aug 4, 2023
Bitcoin Optech: Newsletter #262 Recap
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 #6399 (33:03)
* Core Lightning #6389 (35:48)
* Core Lightning #6403 (37:37)
* Core Lightning #6398 (39:52)
* Core Lightning #5492 (45:52)
* Eclair #2680 (51:42)
* LND #7820 (53:57)
* LND #7516 (54:57)
* BTCPay Server #5155 (57:26)
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Jul 27, 2023
Bitcoin Optech: Newsletter #261 Recap
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 spending transaction to signal BIP125 replaceability? (1:03:04)
* How do route hints affect pathfinding? (1:08:23)
* What does it mean that the security of 256-bit ECDSA, and therefore Bitcoin keys, is 128 bits? (1:12:26)
Releases and release candidates
* HWI 2.3.0 (1:15:09)
* LDK 0.0.116 (1:16:37)
Notable code and documentation changes
* Bitcoin Core GUI #740 (1:17:18)
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Jul 20, 2023
Bitcoin Optech: Newsletter #260 Recap
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 announced (25:27)
* BitGo adds MuSig2 support (37:42)
* Peach adds RBF support (44:34)
* Phoenix wallet adds splicing support (46:34)
* Mining Development Kit call for feedback (49:27)
* Binance adds Lightning support (51:33)
* Nunchuk adds CPFP support (53:35)
Notable code and documentation changes
* Bitcoin Core #27411 (54:57)
* Core Lightning #6347 (58:07)
* Core Lightning #6035 (1:00:47)
* LND #7768 (1:02:28)
* Libsecp256k1 #1313 (1:05:33)
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Jul 13, 2023
Bitcoin Optech: Newsletter #259 Recap
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
* Bitcoin Core #27869 (51:48)
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Jul 6, 2023
Bitcoin Optech: Newsletter #258 Recap
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)
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Jun 29, 2023
Bitcoin Optech: Newsletter #257 Recap
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 have so many excluded transactions? (57:38)
* Why does everyone say that soft forks restrict the existing ruleset? (1:05:28)
* Why is the default LN channel limit set to 16777215 sats? (1:07:47)
* Why does Bitcoin Core use ancestor score instead of just ancestor fee rate to select transactions? (1:10:28)
* How does Lightning multipart payments (MPP) protocol define the amounts per part? (1:14:15)
Releases and release candidates
* BTCPay Server 1.10.3 (1:16:08)
Notable code and documentation changes
* Core Lightning #6303 (1:21:14)
* Eclair #2701 (1:22:21)
* Ecla…
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Jun 22, 2023
Bitcoin Optech: Newsletter #256 Recap
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 EttaWallet announced (35:47)
* zkSNARK-based block header sync PoC announced (37:09)
* lnprototest v0.0.4 released (39:45)
Releases and release candidates
* Eclair v0.9.0 (41:24)
Notable code and documentation changes
* LDK #2294 (44:33)
* LDK #2156 (46:57)
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Jun 15, 2023
Bitcoin Optech: Newsletter #255 Recap
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 evict peers when slots are full (53:38)
Releases and release candidates
* Core Lightning 23.05.1 (1:07:01)
Notable code and documentation changes
* Bitcoin Core #27501 (1:07:41)
* Core Lightning #6243 (1:11:40)
* Eclair #2677 (1:12:46)
* Rust bitcoin #1890 (1:15:56)
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Jun 8, 2023
Bitcoin Optech: Newsletter #254 Recap
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 (46:11)
* LND #7726 (48:25)
* LDK #2293 (51:04)
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Jun 1, 2023
Bitcoin Optech: Newsletter #253 Recap
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 governing motivation for the descendent size limit? (1:13:19)
* How does it contribute to the Bitcoin network when I run a node with a bigger than default mempool? (1:16:48)
* What is the maximum number of inputs/outputs a transaction can have? (1:21:18)
* Can 2-of-3 multisig funds be recovered without one of the xpubs? (1:23:50)
Releases and release candidates
* Bitcoin Core 25.0 (1:27:05)
Notable code and documentation changes
* Bitcoin Core #27469 (1:30:27)
* Bitcoin Core #27626 (1:32:40)
* Bitcoin Core #25796 (1:35:24)
* Eclair #2668 (1:37:17)
* Eclair #2…
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May 25, 2023
Bitcoin Optech: Newsletter #252 Recap
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)
* Electrum 4.4.3 released (40:01)
* Trezor Suite adds coinjoin support (40:32)
* Lightning Loop defaults to MuSig2 (41:18)
* Mutinynet announces new signet for testing (42:40)
* Nunchuk adds coin control, BIP329 support (44:55)
* MyCitadel Wallet adds enhanced miniscript support (45:22)
* Edge Firmware for Coldcard announced (47:08)
Releases and release candidates
* Core Lightning 23.05 (49:54)
* Bitcoin Core 23.2 (52:20)
* Bitcoin Core 24.1 (52:20)
* Bitcoin Core 25.0rc2 (54:06)
Notable code and documentation changes
* Bitcoin Core #27021 (56…
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May 18, 2023
Bitcoin Optech: Newsletter #251 Recap
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 (37:35)
Waiting for confirmation #1: why do we have a mempool? (51:07)
Releases and release candidates
* Libsecp256k1 0.3.2 (1:04:21)
* Core Lightning 23.05rc2 (1:05:07)
* Bitcoin Core 23.2rc1 (1:05:20)
* Bitcoin Core 24.1rc3 (1:05:20)
* Bitcoin Core 25.0rc2 (1:05:20)
Notable code and documentation changes
* Bitcoin Core #26076 (1:06:10)
* Bitcoin Core #27608 (1:07:20)
* LDK #2286 (1:08:27)
* LDK #1794 (1:08:47)
* Rust Bitcoin #1844 (1:09:08)
* Rust Bitcoin #1837 (1:11:33)
* BOLTs #1075 (1:12:04)
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May 11, 2023
Bitcoin Optech: Newsletter #250 Recap
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 documentation changes
* Bitcoin Core #26094 (45:42)
* Bitcoin Core #27195 (46:42)
* Eclair #1783 (48:34)
* LND #7568 (50:11)
* LDK #2044 (52:45)
Celebrating Optech Newsletter #250 (54:17)
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May 4, 2023
Bitcoin Optech: Newsletter #249 Recap
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
* Bitcoin Core #25158 (58:17)
* Bitcoin Core #26933 (1:00:23)
* Bitcoin Core #25325 (1:04:24)
* Bitcoin Core #25939 (1:07:18)
* LDK #2222 (1:12:31)
* LDK #2208 (1:15:39)
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Apr 27, 2023
Bitcoin Optech: Newsletter #248 Recap
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 & CPFP + RBF? (22:51)
Releases and release candidates
* LDK 0.0.115 (25:01)
* LND v0.16.1-beta (25:48)
* Core Lightning 23.05rc1 (27:01)
Notable code and documentation changes
* LND #7564 (27:35)
* LND #6903 (28:10)
* LDK #2198 (29:40)
* Bitcoin Inquisition #23 (32:37)
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Apr 20, 2023
Bitcoin Optech: Newsletter #247 Recap
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-based Electrum Server announced (48:12)
Releases and release candidates
* BDK 0.28.0 (53:08)
* Core Lightning 23.02.2 (55:01)
* Core Lightning 23.05rc1 (55:40)
Notable code and documentation changes
* Bitcoin Core #27358 (56:57)
* Core Lightning #6120 (1:01:14)
* Eclair #2584 (1:04:54)
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Apr 13, 2023
Bitcoin Optech: Newsletter #246 Recap
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 (58:08)
Notable code and documentation changes
* Core Lightning #6012 (58:33)
* Core Lightning #6124 (1:02:01)
* Eclair #2607 (1:03:06)
* LND #7437 (1:04:05)
* LND #7069 (1:04:43)
* BIPs #1372 (1:06:18)
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Apr 6, 2023
Bitcoin Optech: Newsletter #245 Recap
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 #4782 (29:51)
* BTCPay Server #4799 (30:15)
* BOLTs #765 (31:37)
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Mar 30, 2023
Bitcoin Optech: Newsletter #244 Recap
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 transaction data and ids? (39:04)
* Can I request tx messages from other peers? (43:33)
* Eltoo: Does the relative locktime on the first UTXO set the lifetime of the channel? (47:34)
Releases and release candidates
* Rust Bitcoin 0.30.0 (52:23)
* LND v0.16.0-beta.rc5 (53:43)
* BDK 1.0.0-alpha.0 (54:16)
Notable code and documentation changes
* Bitcoin Core #27278 (54:45)
* Bitcoin Core #26531 (1:00:26)
* Core Lightning #5898 (1:03:23)
* Core Lightning #5986 (1:05:21)
* Eclair #2616 (1:07:43)
* LDK #2024 (1:10:34)
* Rust Bitcoin #1737 (1:12:43)
* BTC…
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Mar 29, 2023
Bitcoin Optech: Newsletter #243 Recap
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 launches (10:48)
* BTCPay Server coinjoin plugin released (14:01)
* mempool.space explorer enhances CPFP support (18:46)
* Sparrow v1.7.3 released (21:38)
* Stack Wallet adds coin control, BIP47 (24:22)
* Wasabi Wallet v2.0.3 released (26:26)
Releases and release candidates
* LND v0.16.0-beta.rc3 (28:32)
Notable code and documentation changes
* LND #7448 (29:16)
* BDK #793 (36:03)
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Mar 22, 2023
Bitcoin Optech: Newsletter #242 Recap
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)
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Mar 13, 2023
Bitcoin Optech: Newsletter #241 Recap
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 v0.16.0-beta.rc2 (41:40) Notable code and documentation changes
* LND #7462 (42:48)
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Mar 6, 2023
Bitcoin Optech: Newsletter #240 Recap
Mark "Murch" Erhardt and Mike Schmidt discuss Newsletter #240. News
* Faster seed backup checksums (2:31) Releases and release candidates
* HWI 2.2.1 (10:17)
* Core Lightning 23.02rc3 (11:38)
* lnd v0.16.0-beta.rc1 (12:03) Notable code and documentation changes
* Bitcoin Core #25943 (12:59)
* Bitcoin Core #26595 (15:11)
* Bitcoin Core #27068 (16:51)
* LDK #1988 (18:37)
* LDK #1977 (20:15)
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Feb 27, 2023
Bitcoin Optech: Newsletter #239 Recap
Join Mark “Murch” Erhardt and Mike Schmidt as they are joined by James O’Beirne, Christian Decker, and Russell O’Connor to discuss Newsletter #239.
A full transcript of the discussion is available here. News
* Draft BIP for OP_VAULT (1:18)
* LN quality of service flag (4:15)
* Feedback requested on LN good neighbor scoring (13:58)
* Proposed BIP for Codex32 seed encoding scheme (20:27) Selected Q&A from Bitcoin Stack Exchange
* Why is witness data downloaded during IBD in prune mode? (36:40)
* Can Bitcoin’s P2P network relay compressed data? (40:39)
* How does one become a DNS seed for Bitcoin Core? (41:18)
* Where can I learn about open research topics in Bitcoin? (44:00)
* What is the maximum size transaction that will be relayed by bitcoin nodes using the default configuration? (47:55)
* Understanding how ordinals work with in Bitcoin. What is exactly stored on the blockchain? (50:07)
* Why doesn’t the protocol allow unconfirmed transactions to…
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Feb 16, 2023
Bitcoin Optech: Newsletter #238 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by AJ Towns, Yuval Kogman, Alex Myers and Vivek Kasarabada to discuss Newsletter #238.
News
* Continued discussion about block chain data storage (1:02)
* Fee dilution in multiparty protocols (27:29)
* Tapscript signature malleability (33:47)
Changes to services and client software
* Liana wallet adds multisig (37:35)
* Sparrow wallet 1.7.2 released (38:46)
* Bitcoinex library adds schnorr support (39:20)
* Libwally 0.8.8 released (39:59)
Optech Recommends
* BitcoinSearch.xyz (40:40)
Releases and release candidates
* Core Lightning 23.02rc2 (42:21)
* BTCPay Server 1.7.11 (47:49)
* BDK 0.27.0 (49:32)
Notable code and documentation changes
* Core Lightning #5361 (49:51)
* Core Lightning #5670 and #5956 (54:45)
* Core Lightning #5697 (56:23)
* Core Lightning #5960 (57:38)
* LND #7171 (58:54)
* LDK #2002 (1:00:01)
* BTCPay Server #4600 (1:00:59)
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Feb 9, 2023
Bitcoin Optech: Newsletter #237 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Martin Zumsande and Carla Kirk-Cohen to discuss Newsletter #237.
News
* Discussion about storing data in the block chain (1:19)
* Summary of call about mitigating LN jamming (11:05)
Bitcoin Core PR Review Club
* Track AddrMan totals by network and table, improve precision of adding fixed seeds (27:50)
Notable code and documentation changes
* Bitcoin Core #25880 (39:45)
* Core Lightning #5679 (45:34)
* Core Lightning #5821 (46:25)
* Core Lightning #5849 (47:20)
* Core Lightning #5892 (47:51)
* Eclair #2565 (48:59)
* LND #7252 (51:03)
* LND #6527 (51:53)
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Feb 2, 2023
Bitcoin Optech: Newsletter #236 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Dan Gould and Bastien Teinturier to discuss Newsletter #236.
News
* Serverless payjoin proposal (1:30)
* LN async proof of payment (18:44)
Notable code and documentation changes
* Bitcoin Core #26471 (28:50)
* Bitcoin Core #23395 (32:11)
* Eclair #2573 (33:20)
* Eclair #2574 (33:20)
* Eclair #2540 (38:23)
* LND #7231 (44:33)
* LDK #1878 (47:47)
* LDK #1860 (50:35)
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Jan 26, 2023
Bitcoin Optech: Newsletter #235 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Valentine Wallace to discuss Newsletter #235.
News
* Ephemeral anchors compared to `SIGHASH_GROUP` (0:58)
* Request for proof that an async payment was accepted (12:04)
Selected Q&A from Bitcoin Stack Exchange
* Bitcoin Core signing keys were removed from repo. What is the new process? (27:53)
* Why doesn't signet use a unique bech32 prefix? (31:36)
* Arbitrary data storage in witness? (34:07)
* Why is the locktime set at transaction level while the sequence is set at input level? (38:35)
* BLS signatures vs Schnorr (42:30)
* Why exactly would adding further divisibility to bitcoin require a hard fork? (46:56)
Notable code and documentation changes
* Bitcoin Core #26325 (55:20)
* Libsecp256k1 #1192 (57:37)
* BIPs #1383 (1:00:22)
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Jan 19, 2023
Bitcoin Optech: Newsletter #234 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by James O’Beirne to discuss Newsletter #234.
News
* Proposal for new vault-specific opcodes (1:48)
Changes to services and client software
* Kraken announces sending to taproot addresses (53:01)
* Whirlpool coinjoin rust client library announced (53:45)
* Ledger supports miniscript (54:25)
* Liana wallet released (55:11)
* Electrum 4.3.3 released (58:40)
Releases and release candidates
* HWI 2.2.0 (1:00:04)
Notable code and documentation changes
* Core Lightning #5751 (1:02:54)
* BIPs #1378 (1:06:23)
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Jan 12, 2023
Bitcoin Optech: Newsletter #233 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Jesse Posner and ZmnSCPxj to discuss Newsletter #233.
News
* Non-interactive LN channel open commitments (3:20)
Releases and release candidates
* BDK 0.26.0 (54:27)
* HWI 2.2.0-rc1 (55:55)
Notable code and documentation changes
* Eclair #2455 (56:56)
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Jan 5, 2023
Bitcoin Optech: Newsletter #232 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Peter Todd to discuss Newsletter #232.
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Dec 15, 2022
Bitcoin Optech: Newsletter #230 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Ben Carman and Joost Jager to discuss Newsletter #230.
News
* Factory-optimized LN protocol proposal (2:34)
* Local jamming to prevent remote jamming (9:28)
* Monitoring of full-RBF replacements (29:17)
Changes to services and client software
* Lily Wallet adds coin selection (38:57)
* Vortex software creates LN channels from a coinjoin (41:42)
* Mutiny demonstrates LN node in a browser PoC (49:31)
* Coinkite launches BinaryWatch.org (55:02)
Selected Q&A from Bitcoin Stack Exchange
* Why is connecting to the Bitcoin network exclusively over Tor considered a bad practice? (57:46)
* Why aren't 3 party (or more) channels realistically possible in Lightning today? (1:01:38)
* With legacy wallets deprecated, will Bitcoin Core be able to sign messages for an address? (1:06:14)
* How do I set up a time-decay multisig? (1:09:07)
* When is a miniscript solution malleable? (1:11:01)
Releases and release candid…
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Dec 8, 2022
Bitcoin Optech: Newsletter #229 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Greg Sanders and Larry Ruane to discuss Newsletter #229.
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Dec 1, 2022
Bitcoin Optech: Newsletter #228 Recap
Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #228.
News
* Reputation credentials proposal to mitigate LN jamming attacks (00:33)
Releases and release candidates
* LND 0.15.5-beta.rc2 (20:33)
* Core Lightning 22.11rc3 (21:29)
Notable code and documentation changes
* Core Lightning #5727 (26:41)
* Eclair #2499 (28:32)
* LND #7122 (36:09)
* LDK #1852 (41:51)
* Libsecp256k1 #993 (55:02)
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Nov 23, 2022
Bitcoin Optech: Newsletter #227 Recap
Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #227.
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Nov 17, 2022
Bitcoin Optech: Newsletter #226 Recap
Mike Schmidt is joined by Salvatore Ingala and Clara Shikhelman to discuss Newsletter #226.
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Nov 10, 2022
Bitcoin Optech: Newsletter #225 Recap
Mark “Murch” Erhardt and Mike Schmidt discuss Newsletter #225.
News
* Continued discussion about enabling full-RBF (0:54)
* Block parsing bug affecting multiple software (14:36)
Bitcoin Core PR Review Club
* Relax MIN_STANDARD_TX_NONWITNESS_SIZE to 65 non-witness bytes (19:32)
Releases and release candidates
* Rust Bitcoin 0.28.2 (28:41)
* Bitcoin Core 24.0 RC3 (29:40)
Notable code and documentation changes
* Bitcoin Core #26419 (30:22)
* Eclair #2404 (31:21)
* Eclair #2468 (32:11)
* Eclair #2469 (34:31)
* Eclair #2362 (35:18)
* Eclair #2441 (36:40)
* LND #7100 (38:29)
* LDK #1761 (38:44)
* LDK #1743 (40:57)
* BTCPay Server #4157 (42:05)
* BOLTs #1032 (42:45)
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Nov 3, 2022
Bitcoin Optech: Newsletter #224 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Bastien Teinturier and Joost Jager to discuss Newsletter #224.
News
* Mempool consistency (3:15)
* BIP324 message identifiers (17:55)
* LN routing failure attribution (21:24)
* Anchor outputs workaround (33:08)
Releases and release candidates
* LND 0.15.4-beta (42:27)
* Bitcoin Core 24.0 RC2 (51:36)
Notable code and documentation changes
* Bitcoin Core #23927 (52:50)
* Bitcoin Core #25957 (55:18)
* Bitcoin Core #23578 (56:42)
* Core Lightning #5646 (57:53)
* LND #6517 (1:01:18)
* LND #7001 (1:03:52)
* LND #6831 (1:05:58)
* LND 609cc8b (1:08:42)
* Rust Bitcoin #957 (1:09:15)
* BDK #779 (1:10:08)
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Oct 27, 2022
Bitcoin Optech: Newsletter #223 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Gregory Sanders, and Sergej Kotliar to discuss Newsletter #223.
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Oct 20, 2022
Bitcoin Optech: Newsletter #222 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by John Light and Gregory Sanders to discuss Newsletter #222.
News
* Block parsing bug affecting BTCD and LND (0:10)
* Transaction replacement option (5:34)
* Validity rollups research (18:02)
* MuSig2 security vulnerability (52:00)
* Minimum relayable transaction size (55:55)
* BIP324 update (1:01:52)
Changes to services and client software
* btcd v0.23.2 released (1:05:30)
* ZEBEDEE announces hosted channel libraries (1:06:30)
* Cashu launches with Lightning support (1:08:47)
* Address explorer Spiral launches (1:13:10)
* BitGo announces Lightning support (1:16:15)
* ZeroSync project launches (1:17:42)
Releases and release candidates
* Bitcoin Core 24.0 RC2 (1:20:16)
* LND 0.15.3-beta (1:21:22)
Notable code and documentation changes
* Bitcoin Core #23549 (1:21:38)
* Bitcoin Core #25412 (1:23:29)
* LND #6956 (1:23:49)
* LND #7004 (1:25:31)
* LDK #1625 (1:25:54)
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Oct 13, 2022
Bitcoin Optech: Newsletter #221 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Ruben Somsen and Martin Zumsande to discuss Newsletter #221.
News
* LN with long timeouts proposal (18:45)
* Recommendations for unique address servers (1:32)
Bitcoin Core PR Review Club
* Make AddrFetch connections to fixed seeds (23:32)
Releases and release candidates
* LND v0.15.2-beta (35:04)
* Bitcoin Core 24.0 RC1 (38:14)
Notable code and documentation changes
* LND #6500 (39:18)
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Oct 6, 2022
Bitcoin Optech: Newsletter #220 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao and Rene Pickhardt to discuss Newsletter #220.
News
* Proposed new transaction relay policies designed for LN-penalty (1:30)
* LN flow control (22:06)
Releases and release candidates
* Bitcoin Core 24.0 RC1 (44:38)
Notable code and documentation changes
* Eclair #2435 (51:28)
* BOLTs #962 (54:38)
* BIPs #1370 (55:29)
* BIPs #1367 (1:03:04)
* BIPs #1349 (1:08:54)
* BIPs #1293 (1:12:26)
* BIPs #1364 (1:14:47)
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Sep 29, 2022
Bitcoin Optech: Newsletter #219 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Anthony Towns and Andreas Kouloumos to discuss Newsletter #219.
News
* LN fee ratecards (0:51)
* Bitcoin implementation designed for testing soft forks on signet (11:35)
Selected Q&A from Bitcoin Stack Exchange
* Is it possible to determine whether an HD wallet was used to create a given transaction? (34:10)
* Why is there a 5-day gap between the genesis block and block 1? (38:08)
* Is it possible to set RBF as always-on in bitcoind? (42:09)
* Why would I need to ban peer nodes on the Bitcoin network? (45:53)
Releases and release candidates
* Core Lightning 0.12.1 (49:06)
* Bitcoin Core 24.0 RC1 (49:17)
Notable code and documentation changes
* Bitcoin Core #26116 (59:05)
* Core Lightning #5594 (1:00:04)
* Core Lightning #5315 (1:01:02)
* Rust Bitcoin #1258 (1:04:09)
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