Shows
Bitcoin Optech PodcastBitcoin Optech: Newsletter #374 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Gustavo Flores Echaiz to discuss Newsletter #374.Changing consensus● Draft BIPs for Script Restoration (0:40) Releases and release candidates● Bitcoin Core 30.0rc2 (19:19) ● bdk-wallet 2.2.0 (23:39) ● LND v0.20.0-beta.rc1 (24:15) Notable code and documentation changes● Bitcoin Core #33229 (25:03) ● Bitcoin Core #33446 (26:55) ● LDK #3838 (28:11) ● LDK #4098 (30:40) ● LDK #4106 (33:40) ● LDK #4096 (35:43) ● LND #10133 (37:24) ● BDK #2029 (39:08) ● BIPs #1911 (42:15)
2025-10-0746 minBitcoin Optech PodcastBitcoin Optech: Newsletter #373 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Daniela Brozzoni, and Gustavo Flores Echaiz to discuss Newsletter #373.News● Eclair vulnerability (18:50) ● Research into feerate settings (0:35) Selected Q&A from Bitcoin Stack Exchange● Implications of OP_RETURN changes in upcoming Bitcoin Core version 30.0? (28:27) ● If OP_RETURN relay limits are ineffective, why remove the safeguard instead of keeping it as a default discouragement? (42:12) ● What are the worst-case stress scenarios from uncapped OP_RETURNs in Bitcoin Core v30? (43:25) ● If OP_RETURN need...
2025-10-011h 44Bitcoin Optech PodcastBitcoin Optech: Newsletter #371 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Jonas Nick and Bastien Teinturier to discuss Newsletter #370.News● Provable Cryptography Workbook (0:48) Releases and release candidates● Bitcoin Core 29.1 (10:48) ● Eclair v0.13.0 (11:17) ● Bitcoin Core 30.0rc1 (25:27) Notable code and documentation changes● Bitcoin Core #30469 (33:18) ● Eclair #3163 (33:18) ● Eclair #2308 (40:27) ● Eclair #3021 (45:18) ● Eclair #3142 (48:08) ● LDK #4053 (50:30) ● LDK #3886 (58:12)
2025-09-161h 00Bitcoin Optech PodcastBitcoin Optech: Newsletter #368 RecapMark “Murch” Erhardt and Mike Schmidt discuss Newsletter #368.News● Draft BIP for block template sharing (0:30) ● Trusted delegation of script evaluation (28:07) Changes to services and client software● ZEUS v0.11.3 released (33:07) ● Rust Utreexo resources (33:25) ● Peer-observer tooling and call to action (34:11) ● Bitcoin Core Kernel-based node announced (37:22) ● SimplicityHL released (38:23) ● LSP plugin for BTCPay Server (39:17) ● Proto mining hardware and software announced (39:42) ● Oracle resolution demo using CSFS (40:46) ● Relai adds taproot support (41:11) Releases and rele...
2025-09-081h 07Bitcoin Optech PodcastBitcoin Optech: Newsletter #369 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Bruno Garcia and Liam Eagen to discuss Newsletter #369.News● Update on differential fuzzing of Bitcoin and LN implementations (24:56) ● Garbled locks for accountable computing contracts (0:58) Selected Q&A from Bitcoin Stack Exchange● Is it possible to recover a private key from an aggregate public key under strong assumptions? (39:45) ● Are all taproot addresses vulnerable to quantum computing? (41:24) ● Why cant we set the chainstate obfuscation key? (45:20) ● Is it possible to revoke a spending branch...
2025-09-021h 08Bitcoin Optech PodcastBitcoin Optech: Newsletter #367 RecapMark “Murch” Erhardt and Mike Schmidt discuss Newsletter #367.Releases and release candidates● LND v0.19.3-beta.rc1 (0:19) ● Bitcoin Core 29.1rc1 (0:46) Notable code and documentation changes● Bitcoin Core #33050 (2:38) ● Bitcoin Core #32473 (11:04)● Bitcoin Core #33077 (17:57) ● Core Lightning #8389 (22:03)
2025-08-1923 minBitcoin Optech PodcastBitcoin Optech: Newsletter #366 RecapGloria Zhao and Mike Schmidt are joined by Tadge Dryja and Anthony Towns to discuss Newsletter #366.News● Draft BIPs proposed for Utreexo (1:03) ● Continued discussion about lowering the minimum relay feerate (23:43) ● Peer block template sharing to mitigate problems with divergent mempool policies (52:27) Bitcoin Core PR Review Club● Add exportwatchonlywallet RPC to export a watchonly version of a wallet (1:11:41)Optech recommends (1:15:50) Releases and release candidates● LND v0.19.3-beta.rc1 (1:17:04) ● BTCPay Server 2.2...
2025-08-131h 43Bitcoin Optech PodcastBitcoin Optech: Newsletter #365 RecapMark “Murch” Erhardt and Mike Schmidt are joined by David Gumberg, Lauren Shareshian, Jameson Lopp, Steven Roose, and Tim Ruffing to discuss Newsletter #365.News● Testing compact block prefilling (1:13:00) ● Mempool-based fee estimation library (1:33:53) Changing consensus● Migration from quantum-vulnerable outputs (49:17) ● Taproot-native `OP_TEMPLATEHASH` proposal (1:13) ● Proposal to allow longer relative timelocks (12:57) ● Security against quantum computers with taproot as a commitment scheme (23:48) Releases and release candidates● Bitcoin Core 29.1rc1 (1:46:55) Notable code and do...
2025-08-061h 56Bitcoin Optech PodcastBitcoin Optech: Newsletter #364 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse and Jesse Posner to discuss Newsletter #364.News● LND gossip filter DoS vulnerability (0:53) ● Chain code withholding for multisig scripts (15:16) ● Research indicates common Bitcoin primitives are compatible with quantum-resistant signature algorithms (38:46) Selected Q&A from Bitcoin Stack Exchange● How does Bitcoin Core handle reorgs larger than 10 blocks? (57:36) ● Advantages of a signing device over an encrypted drive? (1:01:29) ● Spending a taproot output through the keypath and scriptpath? (1:03:21) Releases and rel...
2025-07-311h 25Bitcoin Optech PodcastBitcoin Optech: Newsletter #363 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Davidson Souza to discuss Newsletter #363.Changes to services and client software● Floresta v0.8.0 released (0:45) ● RGB v0.12 announced (20:38) ● FROST signing device available (25:34) ● Gemini adds taproot support (29:44) ● Electrum 4.6.0 released (38:14) Releases and release candidates● LND v0.19.2-beta (38:51) Notable code and documentation changes● Bitcoin Core #32604 (39:38) ● Bitcoin Core #32618 (40:55) ● Bitcoin Core #31553 (43:03) ● Core Lightning #7725 (46:53) ● Eclair #2716 (47:23) ● LDK #3628 (52:19) ● LDK #3890 (53:22) ● LND #100
2025-07-2257 minBitcoin Optech PodcastBitcoin Optech: Newsletter #361 RecapSanket Kanjalkar, Jonas Nick, Tadge Dryja, Steven Roose, and Brandon Black join Mark “Murch” Erhardt and Mike Schmidt to discuss Newsletter #361.News● Separating onion message relay from HTLC relay (2:06) Changing consensus● CTV+CSFS advantages for PTLCs (5:45) ● Vault output script descriptor (15:21) ● Continued discussion about CTV+CSFS advantages for BitVM (22:57) ● Open letter about CTV and CSFS (27:59) ● OP_CAT enables Winternitz signatures (1:12:27) ● Commit/reveal function for post-quantum recovery (1:22:46) ● OP_TXHASH variant with support for transaction sponsorship (1:53:31) Notab...
2025-07-102h 19Bitcoin Optech PodcastBitcoin Optech: Newsletter #360 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Daniela Brozzoni and Naiyoma to discuss Newsletter #360.News● Fingerprinting nodes using `addr` messages (1:00) ● Does any software use `H` in descriptors? (29:36) Selected Q&A from Bitcoin Stack Exchange● Is there any way to block Bitcoin Knots nodes as my peers? (33:42) ● What does OP_CAT do with integers? (42:00) ● Async Block Relaying With Compact Block Relay (BIP152) (43:03) ● Why is attacker revenue in selfish mining disproportional to its hash-power? (52:47) Releases and rel...
2025-07-011h 08Bitcoin Optech PodcastBitcoin Optech: Newsletter #356 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Carla Kirk-Cohen, Joost Jager, and Elias Rohrer to discuss Newsletter #356.News● Do attributable failures reduce LN privacy? (0:57) Selected Q&A from Bitcoin Stack Exchange● Which transactions get into blockreconstructionextratxn? (40:40) ● Why would anyone use OP_RETURN over inscriptions, aside from fees? (46:47) ● Why is my Bitcoin node not receiving incoming connections? (48:25) ● How do I configure my node to filter out transactions larger than 400 bytes? (49:44) ● What does not publicly routable node in Bitcoin Core P...
2025-06-031h 12Bitcoin Optech PodcastBitcoin Optech: Newsletter #355 RecapDave Harding is joined by Alex Myers and Rodolfo Novak to discuss Newsletter #355.Changes to services and client software● Cake Wallet added payjoin v2 support (2:38) ● Sparrow adds pay-to-anchor features (6:37) ● Safe Wallet 1.3.0 released (8:00) ● COLDCARD Q v1.3.2 released (9:15) ● Transaction batching using payjoin (19:07) ● JoinMarket Fidelity Bond Simulator (20:46) ● Bitcoin opcodes documented (26:39) ● Bitkey code open sourced (27:59) Releases and release candidates● LND 0.19.0-beta (33:43) ● Core Lightning 25.05rc1 (40:12) Notable code and documentation changes● Bitco...
2025-06-021h 07Bitcoin Optech PodcastBitcoin Optech: Newsletter #354 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Eugene Siegel, Chris Stewart, Bram Cohen, and Robin Linus to discuss Newsletter #353.News● Vulnerability disclosure affecting old versions of Bitcoin Core (1:17) Changing consensus● Proposed BIP for 64-bit arithmetic in Script (5:28) ● Proposed opcodes for enabling recursive covenants through quines (23:11) ● Description of benefits to BitVM from `OP_CTV` and `OP_CSFS` (36:39) Releases and release candidates● LND 0.19.0-beta.rc4 (1:07:28) Notable code and documentation changes●...
2025-05-211h 23Bitcoin Optech PodcastBitcoin Optech: Newsletter #353 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Ruben Somsen, Salvatore Ingala, and Stéphan Vuylsteke to discuss Newsletter #353.News● BIP30 consensus failure vulnerability (0:52) ● Avoiding BIP32 path reuse (28:33) Bitcoin Core PR Review Club● Add bitcoin wrapper executable (16:38) Releases and release candidates● LND 0.19.0-beta.rc4 (45:01) Notable code and documentation changes● Core Lightning #8227 (45:18) ● Core Lightning #8162 (46:43) ● Core Lightning #8166 (47:44) ● Core Lightning #8237 (48:49) ● LDK #3700 (49:28) ● Rust Bitcoin #4387 (49:55...
2025-05-1557 minBitcoin Optech PodcastBitcoin Optech: Newsletter #350 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Niklas Gögge to discuss Newsletter #350.Changes to services and client software● Bitcoin Knots version 28.1.knots20250305 released (11:26) ● PSBTv2 explorer announced (13:51) ● LNbits v1.0.0 released (14:38) ● The Mempool Open Source Project® v3.2.0 released (15:22) ● Coinbase MPC library released (17:25) ● Lightning Network liquidity tool released (21:20) ● Versioned Storage Service announced (22:25) ● Fuzz testing tool for Bitcoin nodes (1:17) ● Bitcoin Control Board components open-sourced (23:50) Releases and release candidates● Bitcoin Core 29.0 (25:13) ● LND 0.19.0-beta.rc2 (34...
2025-04-2241 minBitcoin Optech PodcastBitcoin Optech: Newsletter #349 RecapMark “Murch” Erhardt and Dave Harding are joined by Sebastian Falbesoner, Ruben Somsen, and Abubakar Sadiq Ismail to discuss Newsletter #349.News● SwiftSync speedup for initial block download (0:34) Bitcoin Core PR Review Club● Add Fee rate Forecaster Manager (29:33) Releases and release candidates● Core Lightning 25.02.1 (46:54) ● Core Lightning 24.11.2 (47:03) ● BTCPay Server 2.1.0 (48:14) ● Bitcoin Core 29.0rc3 (49:25) ● LND 0.19.0-beta.rc2 (51:21) Notable code and documentation changes● LDK #2256 (53:52) ● LND #9669 (56:16) ● Rust Bitcoin #4302 (57:
2025-04-2258 minBitcoin Optech PodcastBitcoin Optech: Newsletter #348 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Jonas Nick, Jameson Lopp, Steven Roose, Gregory Sanders, and Salvatore Ingala to discuss Newsletter #348.News● Educational and experimental-based secp256k1 implementation (1:09) Changing consensus● Should vulnerable bitcoins be destroyed? (9:17) ● Securely proving UTXO ownership by revealing a SHA256 preimage (34:52) ● Draft BIP for destroying quantum-insecure bitcoins (44:01) ● Criticism of CTV motivation (51:16) ● CTV+CSFS benefits (1:06:02) ● Benefit of CTV to Ark users (1:24:37) ● OP_CHECKCONTRACTVERIFY semantics (1:31:49) ● Draft BIP published for consensus cleanup (1:58...
2025-04-212h 18Bitcoin Optech PodcastBitcoin Optech: Newsletter #347 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Sjors Provoost and Antoine Poinsot to discuss Newsletter #347.News● LN upfront and hold fees using burnable outputs (0:54) ● Discussion of testnets 3 and 4 (5:11) ● Plan to relay certain taproot annexes (19:01) Selected Q&A from Bitcoin Stack Exchange● Why is the witness commitment optional? (24:58) ● Can all consensus valid 64 byte transactions be (third party) malleated to change their size? (36:39) ● How long does it take for a transaction to propagate through the network? (47:37) ● Utility of longte...
2025-04-011h 17Bitcoin Optech PodcastBitcoin Optech: Newsletter #346 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Yong Yu, Alejandro De La Torre, Jan B, and Marco De Leon to discuss Newsletter #346.News● Discussion of LND's dynamic feerate adjustment system (1:24) Changes to services and client software● Wally 1.4.0 released (17:17) ● Bitcoin Core Config Generator announced (18:05) ● A regtest development environment container (18:55) ● Explora transaction visualization tool (20:17) ● Hashpool v0.1 tagged (21:35) ● DMND launching pooled mining (24:36) ● Krux adds taproot and miniscript (22:21) ● Source-available secure element announced (23:01) ●...
2025-03-261h 21Bitcoin Optech PodcastBitcoin Optech: Newsletter #344 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Matt Morehouse, Matt Corallo, and Hunter Beast to discuss Newsletter #344.News● Disclosure of fixed LND vulnerability allowing theft (0:57) ● Discussion about Bitcoin Core's priorities (10:49) Changing consensus● Bitcoin Forking Guide (1:01:11) ● Update on BIP360 pay-to-quantum-resistant-hash (P2QRH) (34:37) ● Private block template marketplace to prevent centralizing MEV (21:06) Releases and release candidates● Core Lightning 25.02 (1:09:57) Notable code and documentation changes● Eclair #3019 (1:11:21) ● Eclair #3016 (1:12:05...
2025-03-111h 21Bitcoin Optech PodcastBitcoin Optech: Newsletter #342 RecapDave Harding and Mike Schmidt are joined by Bastien Teinturier and Joost Jager discuss Newsletter #342.News● Allowing mobile wallets to settle channels without extra UTXOs (0:59) ● Continued discussion about an LN quality of service flag (13:14) Changes to services and client software● Ark Wallet SDK released (40:28) ● Zaprite adds BTCPay Server support (40:57) ● Iris Wallet desktop released (41:21) ● Sparrow 2.1.0 released (41:41) ● Scure-btc-signer 1.6.0 released (42:38) ● Py-bitcoinkernel alpha (43:48) ● Rust-bitcoinkernel library (44:30) ● BIP32 cbip32 library (45:56) ● Lightning Loop moves to MuSig2 (46:22)
2025-03-0358 minBitcoin Optech PodcastBitcoin Optech: Newsletter #341 RecapMark “Murch” Erhardt and Mike Schmidt discuss Newsletter #341.News● Continued discussion about probabilistic payments (0:34) ● Continued discussion about ephemeral anchor scripts for LN (7:26) ● Stats on orphan evictions (14:31) ● Updated proposal for updated BIP process (27:08) Bitcoin Core PR Review Club● Cluster mempool: introduce TxGraph (35:43) Releases and release candidates● LND v0.18.5-beta (43:48) ● Bitcoin Inquisition 28.1 (44:10) Notable code and documentation changes● Bitcoin Core #25832 (51:43) ● Eclair #2989 (55:49) ● LDK #3440 (56:36) ● LND #9470 (57:14...
2025-02-1859 minBitcoin Optech PodcastBitcoin Optech: Newsletter #339 RecapMark “Murch” Erhardt and Dave Harding are joined by Matt Morehouse and 0xB10C to discuss Newsletter #339.News● Vulnerability in LDK claim processing (0:47)● Replacement cycling attacks with miner exploitation (17:28)● Updated stats on compact block reconstruction (23:56)Selected Q&A from Bitcoin Stack Exchange● Who uses or wants to use PSBTv2 (BIP370)? (32:38)● In the bitcoin's block genesis, which parts can be filled arbitrarily? (34:41)● Lightning force close detection (36:47)● Is a segwit-formatted transaction with all inputs of non-witness program type valid? (40:01...
2025-02-071h 15Bitcoin Optech PodcastBitcoin Optech: Newsletter #338 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Andrew Toth and Dave Harding to discuss Newsletter #338.
News
- Draft BIP for unspendable keys in descriptors (0:49)
- PSBTv2 integration testing (9:55)
- Correction about offchain DLCs (15:25)
Changes to services and client software
- Bull Bitcoin Mobile Wallet adds payjoin (28:10)
- Bitcoin Keeper adds miniscript support (28:52)
- Nunchuk adds taproot MuSig2 features (29:26)
- Jade Plus signing device announced (32:08)
- Coinswap v0.1.0 released (32:36)
- Bitcoin Safe 1.0.0 released (35:14)
- Bitcoin Core 28.0 policy demonstration (35:41)
- Rust-payjoin 0.21.0 released (36:21)
- PeerSwap v4.0rc1 (37:34)
- Joinpool...
2025-01-2849 minBitcoin Optech PodcastBitcoin Optech: Newsletter #336 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Abubakar Sadiq Ismail, Gregory Sanders, and Daniel Roberts to discuss Newsletter #336.
News
Investigating mining pool behavior before fixing a Bitcoin Core bug (1:07)
Contract-level relative timelocks (15:04)
Multiparty LN-Symmetry variant with penalties for limiting published updates (29:06)
Releases and release candidates
Bitcoin Core 28.1 (39:54)
BDK 0.30.1 (40:45)
LDK v0.1.0-beta1 (42:01)
Notable code and documentation changes
Bitcoin Core #28121 (42:22)
BDK #1592 (43:14)
2025-01-1447 minBitcoin Optech PodcastBitcoin Optech: Newsletter #334: 2024 Year-in-Review Special RecapMark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding, Niklas Gögge, Gloria Zhao, and Rearden to discuss Newsletter #334: 2024 Year-in-Review Special.
January
Fee-dependent timelocks (16:18)
Optimized contract protocol exits (17:20)
LN-Symmetry proof-of-concept implementation (18:22)
February
Replace by feerate (22:32)
Human-readable payment instructions (27:25)
Improved ASMap generation (28:09)
LN dual funding (32:33)
Trustless betting on future feerates (32:56)
Summary 2024: Vulnerability disclosures (7:05)
March
BINANAs and BIPs (33:33)
Enhanced feerate estimation (34:41)
More efficient transaction sponsorship (46:08)
April
Consensus cleanup (50:06)
Reforming the BIPs process (51:08)
Inbound routing fees (53:10)
Weak blocks (54...
2024-12-231h 59Bitcoin Optech PodcastBitcoin Optech: Newsletter #333 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding, /dev/fd0, and Gloria Zhao to discuss Newsletter #333.
News
Vulnerability allowing theft from LN channels with miner assistance (1:11)
Deanonymization vulnerability affecting Wasabi and related software (12:00)
Insights into channel depletion (18:12)
Poll of opinions about covenant proposals (31:14)
Incentive-based pseudo-covenants (41:49)
Bitcoin Core developer meeting summaries (46:45)
Bitcoin Core PR Review Club
Track and use all potential peers for orphan resolution (48:18)
Changes to services and client software
Java-based HWI released (1:00:32)
Saving Satoshi Bitcoin development education game announced (1:01:24)
Neovi...
2024-12-181h 34Bitcoin Optech PodcastBitcoin Optech: Newsletter #331 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Anthony Towns to discuss Newsletter #331.
News
Lisp dialect for Bitcoin scripting (0:48)
Selected Q&A from Bitcoin Stack Exchange
How does ColliderScript improve Bitcoin and what features does it enable? (43:24)
Why do standardness rules limit transaction weight? (48:10)
Is the scriptSig spending an PayToAnchor output expected to always be empty? (56:16)
What happens to the unused P2A outputs? (57:13)
Why doesn't Bitcoin's PoW algorithm use a chain of lower-difficulty hashes? (1:01:47)
Clarification on false value in Script (1:04:38)
What is this strange microtransaction in my wallet? (1:06:02)
Are there any...
2024-12-091h 28Bitcoin Optech PodcastBitcoin Optech: Newsletter #328 RecapMark “Murch” Erhardt and Gregory Sanders discuss Newsletter #328.
News
Disclosure of a vulnerability affecting Bitcoin Core versions before 25.1 (0:53)
Bitcoin Core PR Review Club
Ephemeral Dust (6:54)
Releases and release candidates
Bitcoin Core 27.2 (14:55)
Libsecp256k1 0.6.0 (15:40)
Notable code and documentation changes
LDK #3360 (17:40)
LDK #3207 (18:45)
2024-11-2220 minBitcoin Optech PodcastBitcoin Optech: Newsletter #326 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Elle Mouton and Andrew Toth to discuss Newsletter #326.
News
Updates to the version 1.75 channel announcements proposal (1:36)
Draft BIP for sending silent payments with PSBTs (16:28)
Selected Q&A from Bitcoin Stack Exchange
Duplicate blocks in blk*.dat files? (30:07)
How was the structure of pay-to-anchor decided? (32:45)
What are the benefits of decoy packets in BIP324? (36:38)
Why is the opcode limit 201? (39:20)
Will my node relay a transaction if it is below my minimum tx relay fee? (40:31)
Why doesn't the Bitcoin Core wallet support BIP69? (42:09)
How can I...
2024-10-2957 minBitcoin Optech PodcastBitcoin Optech: Newsletter #324 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Antoine Poinsot to discuss Newsletter #324.
News
Disclosure of vulnerabilities affecting Bitcoin Core versions before 25.0 (1:09)
CVE-2024-38365 btcd consensus failure (11:22)
Guide for wallets employing Bitcoin Core 28.0 (23:27)
Bitcoin Core PR Review Club
Add getorphantxs (27:43)
Releases and release candidates
Bitcoin Inquisition 28.0 (26:35)
BDK 1.0.0-beta.5 (31:39)
Notable code and documentation changes
Core Lightning #7494 (32:22)
Core Lightning #7539 (34:46)
LDK #3179 (35:46)
LND #8960 (36:56)
Libsecp256k1 #1479 (37:38)
Rust Bitcoin #2945 (39:29)
BIPs #1674 (39:49)
2024-10-2145 minBitcoin Optech PodcastBitcoin Optech: Newsletter #323 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Bastien Teinturier to discuss Newsletter #323.
News
Impending btcd security disclosure (0:54)
Releases and release candidates
Bitcoin Core 28.0 (3:11)
BDK 1.0.0-beta.5 (15:13)
Notable code and documentation changes
Bitcoin Core #30043 (20:47)
Bitcoin Core #30510 (22:15)
Core Lightning #7644 (25:06)
Eclair #2848 (26:28)
Eclair #2860 (30:57)
Eclair #2861 (29:17)
Eclair #2875 (31:19)
LDK #3303 (40:24)
BDK #1616 (41:29)
BIPs #1600 (46:02)
BOLTs #798 (48:25)
2024-10-0855 minBitcoin Optech PodcastBitcoin Optech: Newsletter #322 RecapJon Atack and Mike Schmidt are joined by Gloria Zhao and Jonas Nick to discuss Newsletter #322.
News
Disclosure of vulnerability affecting Bitcoin Core versions before 24.0.1 (2:01)
Hybrid jamming mitigation testing and changes (17:51)
Shielded client-side validation (CSV) (25:28)
Draft of updated BIP process (48:47)
Selected Q&A from Bitcoin Stack Exchange
What specific verifications are done on a fresh Bitcoin TX and in what order? (54:31)
Why is my bitcoin directory larger than my pruning data limit setting? (55:42)
What do I need to have set up to have `getblocktemplate` work? (58:19)
Can a silent payment address body be brute forced? (1:00:02)
Why d...
2024-10-011h 15Bitcoin Optech PodcastBitcoin Optech: Newsletter #321 RecapRijndael and Mike Schmidt are joined by Andy Schroder and Virtu to discuss Newsletter #321.
News
Proving UTXO set inclusion in zero knowledge (1:47)
LN offline payments (11:32)
DNS seeding for non-IP addresses (30:00)
Changes to services and client software
Strike adds BOLT12 support (42:15)
BitBox02 adds silent payment support (43:29)
The Mempool Open Source Project v3.0.0 released (45:22)
ZEUS v0.9.0 released (46:39)
Live Wallet adds consolidation support (47:04)
Bisq adds Lightning support (48:30)
Releases and release candidates
HWI 3.1.0 (49:32)
Core Lightning 24.08.1 (49:56)
BDK 1.0.0-beta.4 (50:27)
Bitcoin Core 28.0rc2 (51:04)
Notable code and documentation changes
Bitcoin Core #28358 (52:23)
Bitcoin Core #30286 (53:53)
Bitcoin Core #30807 (55:24)
LND #8981 (56:36)
LDK #3140 (57:34)
LDK #3163 (58:50)
LDK...
2024-09-241h 02Bitcoin Optech PodcastBitcoin Optech: Newsletter #320 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Bruno Garcia, Shehzan Maredia, Gloria Zhao, Fabian Jahr, and Gregory Sanders to discuss Newsletter #320.
News
Mutation testing for Bitcoin Core (1:39)
DLC-based loan contract execution (9:15)
Bitcoin Core PR Review Club
Testing Bitcoin Core 28.0 Release Candidates (21:08)
Releases and release candidates
LND v0.18.3-beta (51:33)
BDK 1.0.0-beta.2 (53:05)
Bitcoin Core 28.0rc1 (53:14)
Notable code and documentation changes
Bitcoin Core #30509 (53:38)
Bitcoin Core #29605 (1:00:52)
2024-09-181h 03Bitcoin Optech PodcastBitcoin Optech: Newsletter #319 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Filippo Merli, Lorenzo Bonazzi, Matt Corallo, Eric Voskuil, and rkrux to discuss Newsletter #319.
News
Stratum v2 extension for fee revenue sharing (1:49)
OP_CAT research fund (17:53)
Mitigating merkle tree vulnerabilities (22:43)
Releases and release candidates
Core Lightning 24.08 (55:21)
LDK 0.0.124 (57:59)
LND v0.18.3-beta.rc2 (1:06:19)
BDK 1.0.0-beta.2 (1:06:43)
Bitcoin Core 28.0rc1 (1:07:27)
Notable code and documentation changes
Bitcoin Core #30454 (1:15:05)
Bitcoin Core #22838 (1:17:41)
Eclair #2865 (1:19:56)
LND #9009 (1:21:49)
LDK #3268 (1:23:33)
BIPs #1657 (1:26:55)
2024-09-101h 29Bitcoin Optech PodcastBitcoin Optech: Newsletter #318 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Jay Beddict to discuss Newsletter #318.
News
New Bitcoin Mining Development mailing list (0:48)
Selected Q&A from Bitcoin Stack Exchange
Can a BIP152 compact block be sent before validation by a node that doesn't know all transactions? (15:03)
Did Segwit (BIP141) eliminate all txid malleability issues listed in BIP62? (18:13)
Why are the checkpoints still in the codebase in 2024? (22:35)
Bulletproof++ as generic ZKP ala SNARKs? (26:28)
How can OP_CAT be used to implement additional covenants? (28:13)
Why do some bech32 bitcoin addresses contain a large number of 'q's? (32:25)
How does a 0...
2024-09-0352 minBitcoin Optech PodcastBitcoin Optech: Newsletter #317 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Bob McElrath and moonsettler to discuss Newsletter #317.
News
Simple (but imperfect) anti-exfiltration protocol (0:53)
Changes to services and client software
Proton Wallet announced (23:33)
CPUNet testnet announced (25:38)
Lightning.Pub launches (38:52)
Taproot Assets v0.4.0-alpha released (39:45)
Stratum v2 benchmarking tool released (41:31)
STARK verification PoC on signet (42:52)
SeedSigner 0.8.0 released (48:48)
Floresta 0.6.0 released (50:25)
Releases and release candidates
Core Lightning 24.08rc2 (51:52)
LND v0.18.3-beta.rc1 (52:33)
Notable code and documentation changes
Bitcoin Core #28553 (53:18)
Bitcoin Core #30246 (56:39)
Bitcoin Core GUI #824 (1:02:10)
Core Lightning #7540 (1:04:20)
Core Lightning #7403 (1:05:20)
LND #8943 (1:06:13)
BDK #1478 (1:07:26)
BDK #1533 (1:08:12)
BOLTs #1182 (1:11:49)
BLIPs #39 (1:12:55)
2024-08-271h 14Bitcoin Optech PodcastBitcoin Optech: Newsletter #316 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Bastien Teinturier and Hennadii Stepanov to discuss Newsletter #316.
News
New time warp vulnerability in testnet4 (1:05)
Onion message DoS risk discussion (14:20)
Optional identification and authentication of LN payers (28:04)
Bitcoin Core switch to CMake build system (36:15)
Releases and release candidates
BDK 1.0.0-beta.1 (53:55)
Core Lightning 24.08rc2 (54:10)
LND v0.18.3-beta.rc1 (54:29)
Notable code and documentation changes
Bitcoin Core #29519 (55:01)
Bitcoin Core #30598 (59:29)
Bitcoin Core #28280 (1:02:18)
Bitcoin Core #28052 (1:04:47)
Core Lightning #7528 (1:08:01)
Core Lightning #7533 (1:10:11)
Core Lightning #7517 (1:11:19)
LND #8955 (1:13:08)
LND #8886 (1:14:39)
LND #8967 (1:19:45)
LDK #3215 (1:22:13)
BLIPs #27 (1:26:27)
2024-08-201h 32Bitcoin Optech PodcastBitcoin Optech: Newsletter #315 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Matt Corallo, Greg Sanders, Sivaram Dhakshinamoorthy to discuss Newsletter #315.
News
Faster seed exfiltration attack (1:24)
Block withholding attacks and potential solutions (17:21)
Statistics on compact block reconstruction (21:47)
Replacement cycle attack against pay-to-anchor (36:23)
Proposed BIP for scriptless threshold signatures (42:24)
Optimistic verification of zero-knowledge proofs using CAT, MATT, and Elftrace (50:40)
Bitcoin Core PR Review Club (33:15)
Releases and release candidates
Libsecp256k1 0.5.1 (53:11)
BDK 1.0.0-beta.1 (53:43)
Notable code and documentation changes
Bitcoin Core #30493 (54:38)
Bitcoin Core #30285 (57:33)
Bitcoin Core #30352 (1:02:26)
Bitcoin Core #29775 (1:02:39)
Core Lightning #7476 (1:08:21)
Eclair #2884 (1:08:55)
LND #8952 (1:12:10)
LND #8735 (1:13:40)
BIPs #1601 (1:14:44)
2024-08-131h 20Bitcoin Optech PodcastBitcoin Optech: Newsletter #314 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Sergi Delgado to discuss Newsletter #314.
News
Disclosure of vulnerabilities affecting Bitcoin Core versions before 22.0 (0:56)
Optimizing block building with cluster mempool (11:23)
Hyperion network event simulator for the Bitcoin P2P network (14:30)
Releases and release candidates
BDK 1.0.0-beta.1 (41:01)
Notable code and documentation changes
Bitcoin Core #30515 (41:36)
Bitcoin Core #30126 (43:00)
Bitcoin Core #30482 (44:18)
Bitcoin Core #30275 (45:18)
Bitcoin Core #30408 (47:29)
Core Lightning #7474 (49:27)
LND #8891 (51:21)
LDK #3139 (51:57)
Rust Bitcoin #3010 (52:48)
2024-08-0656 minBitcoin Optech PodcastBitcoin Optech: Newsletter #313 RecapMark “Murch” Erhardt and Mike Schmidt discuss Newsletter #313.
News
Varied discussion of free relay and fee bumping upgrades (0:31)
Selected Q&A from Bitcoin Stack Exchange
Why is restructure of mempool required with cluster mempool? (29:54)
DEFAULT_MAX_PEER_CONNECTIONS for Bitcoin Core is 125 or 130? (36:32)
Why do protocol developers work on maximizing miner revenue? (38:34)
Is there an economic incentive to use P2WSH over P2TR? (42:26)
How many blocks per second can sustainably be created using a time warp attack? (45:30)
pkh() nested in tr() is allowed? (49:01)
Can a block more than a week old be considered a valid c...
2024-07-301h 13Bitcoin Optech PodcastBitcoin Optech: Newsletter #311 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Vojtěch Strnad and Fabian Jahr to discuss Newsletter #311.
News (1:00)
Bitcoin Core PR Review Club
Testnet4 including PoW difficulty adjustment fix (15:14)
Releases and release candidates
Bitcoin Core 26.2 (37:23)
LND v0.18.2-beta (37:42)
Notable code and documentation changes
Rust Bitcoin #2949 (40:04)
BDK #1487 (41:20)
2024-07-1646 minBitcoin Optech PodcastBitcoin Optech: Newsletter #310 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Antoine Poinsot and Elle Mouton to discuss Newsletter #310.
News
Disclosure of vulnerabilities affecting Bitcoin Core versions before 0.21.0 (0:59)
Adding a BOLT11 invoice field for blinded paths (22:17)
Releases and release candidates
Bitcoin Core 26.2rc1 (36:43)
Notable code and documentation changes
Bitcoin Core #28167 (37:48)
Bitcoin Core #30007 (39:07)
Bitcoin Core #30200 (40:37)
Core Lightning #7342 (41:33)
LND #8796 (42:55)
LDK #3125 (45:26)
BIPs #1610 (46:21)
BIPs #1540 (49:07)
2024-07-0953 minBitcoin Optech PodcastBitcoin Optech: Newsletter #309 RecapMark “Murch” Erhardt and Mike Schmidt are joined by René Pickhardt to discuss Newsletter #309.
News
Estimating the likelihood that an LN payment is feasible (1:04)
Selected Q&A from Bitcoin Stack Exchange
How is the progress of Initial Block Download (IBD) calculated? (31:25)
What is `progress increase per hour` during synchronization? (33:50)
Should an even Y coordinate be enforced after every key-tweak operation, or only at the end? (34:45)
Signet mobile phone wallets? (37:28)
What block had the most transaction fees? Why? (39:01)
bitcoin-cli listtransactions fee amount is way off, why? (41:48)
Did uncompressed public keys use the `04` prefix before compressed public key...
2024-07-021h 18Bitcoin Optech PodcastBitcoin Optech: Newsletter #306 RecapMark “Murch” Erhardt and Dave Harding are joined by Fabian Jahr, Anthony Towns, and Matt Corallo to discuss Newsletter #306.
News
Upcoming disclosure of vulnerabilities affecting old versions of Bitcoin Core (1:02)
BIP and experimental implementation of testnet4 (10:17)
Functional encryption covenants (24:58)
Updates to proposed soft fork for 64-bit arithmetic (31:27)
`OP_CAT` script to validate proof of work (33:32)
Proposed update to BIP21 (42:12)
Releases and release candidates
Core Lightning 24.05rc2 (54:53)
Bitcoin Core 27.1rc1 (55:51)
Notable code and documentation changes
Core Lightning #7252 (56:50)
LDK #2931 (1:02:19)
Rust Bitcoin #2644 (1:04:11)
BIPs #1541 (1:05:19)
BIPs #1556 (1:07:34)
BLIPs #32 (1:09:28)
2024-06-111h 17Bitcoin Optech PodcastBitcoin Optech: Newsletter #305 RecapMark “Murch” Erhardt and Dave Harding are joined by Setor Blagogee, Oghenovo Usiwoma, Pierre Rochard, and Alex Bosworth to discuss Newsletter #305.
News
Light client protocol for silent payments (1:52)
Raw taproot descriptors (14:56)
Should overlapping soft fork proposals be considered mutually exclusive? (28:02)
Selected Q&A from Bitcoin Stack Exchange
What's the smallest possible coinbase transaction / block size? (1:13:32)
Understanding Script's number encoding, CScriptNum (1:14:18)
Is there a way to make a BTC wallet address public but hide how many BTC it contains? (1:16:04)
Testing increased feerates in regtest (1:18:05)
Why is my P2P_V2 peer connected over a v1 conne...
2024-06-041h 45Bitcoin Optech PodcastBitcoin Optech: Newsletter #304 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Andrew Toth, Antoine Poinsot, and Tony Klausing to discuss Newsletter #304.
News
Upgrading existing LN channels (1:27)
Challenges in rewarding pool miners (6:58)
Spending previously received SP outputs (12:40)
Proposed miniscript BIP (21:32)
Channel value pegging (31:42)
Changes to services and client software
Silent payment resources (43:50)
Cake Wallet adds silent payments (46:14)
Coordinator-less coinjoin PoC (46:26)
OCEAN adds BOLT12 support (47:10)
Coinbase adds Lightning support (48:57)
Bitcoin escrow tooling announced (49:20)
Block's call for mining community feedback (49:48)
Sentrum wallet tracker released (50:34)
Stack Wallet adds FROST support (51:19)
Transaction broadcast tool announced (53:41)
Releases and release candidates
Bitcoin I...
2024-05-271h 23Bitcoin Optech PodcastBitcoin Optech: Newsletter #301 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Ethan Heilman and Gloria Zhao to discuss Newsletter #301.
News
Consensus-enforced lamport signatures on top of ECDSA signatures (1:00)
Bitcoin Core PR Review Club
Index TxOrphanage by wtxid, allow entries with same txid (31:04)
Releases and release candidates
Libsecp256k1 v0.5.0 (51:15)
LND v0.18.0-beta.rc1 (52:12)
Notable code and documentation changes
Bitcoin Core #28970 (26:33)
Bitcoin Core #28016 (53:05)
Bitcoin Core #29623 (57:00)
2024-05-091h 00Bitcoin Optech PodcastBitcoin Optech: Newsletter #300 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Tadge Dryja to discuss Newsletter #300.
News
CTV-like exploding keys proposal (0:59)
Analyzing a contract protocol with Alloy (13:07)
Arrests of Bitcoin developers (22:37)
CoreDev.tech Berlin event (28:53)
Releases and release candidates
Bitcoin Inquisition 25.2 (31:35)
LND v0.18.0-beta.rc1 (35:59)
Notable code and documentation changes
Bitcoin Core #27679 (36:48)
Core Lightning #7240 (39:39)
Eclair #2851 (44:02)
LND #8147 (45:49)
LND #8627 (47:37)
Libsecp256k1 #1058 (1:00:01)
BIPs #1382 (1:02:01)
BIPs #1068 (1:03:35)
2024-05-021h 05Bitcoin Optech PodcastBitcoin Optech: Newsletter #299 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Gregory Sanders to discuss Newsletter #299.
News
Weak blocks proof-of-concept implementation (0:56)
BIP editors update (20:08)
Selected Q&A from Bitcoin Stack Exchange
Where exactly is the off-by-one difficulty bug? (26:44)
How is P2TR different than P2PKH using opcodes from a developer perspective? (32:10)
Are replacement transactions larger in size than their predecessors and than non-RBF transactions? (34:15)
Are Bitcoin signatures still vulnerable to nonce reuse? (36:59)
How do miners manually add transactions to a block template? (39:48)
Releases and release candidates
LND v0.17.5-beta (41:40)
Notable c...
2024-04-2549 minBitcoin Optech PodcastBitcoin Optech: Newsletter #297 RecapDave Harding and Mike Schmidt are joined by Kulpreet Singh, Chris Stewart, Jameson Lopp, and Joost Jager to discuss Newsletter #297.
News
DSL for experimenting with contracts (1:24)
Updating BIP2 (15:50)
Discussion about resetting and modifying testnet (21:00)
Bitcoin Core PR Review Club
Implement 64 bit arithmetic op codes in the Script interpreter (37:19)
Releases and release candidates
HWI 3.0.0 (46:17)
Core Lightning 24.02.2 (48:06)
Bitcoin Core 27.0rc1 (49:41)
Notable code and documentation changes
Bitcoin Core #29648 (50:25)
Bitcoin Core #29130 (21:00)
2024-04-151h 18Bitcoin Optech PodcastBitcoin Optech: Newsletter #296 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Antoine Poinsot to discuss Newsletter #296.
News
Revisiting consensus cleanup (0:46)
Choosing new BIP editors (27:21)
Releases and release candidates
Bitcoin Core 26.1 (37:22)
Bitcoin Core 27.0rc1 (39:09)
HWI 3.0.0-rc1 (39:40)
Notable code and documentation changes
Bitcoin Core #27307 (40:59)
Bitcoin Core #29242 (43:50)
Core Lightning #7094 (52:59)
BDK #1351 (54:41)
2024-04-041h 03Bitcoin Optech PodcastBitcoin Optech: Newsletter #295 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding, Peter Todd, Abubakar Sadiq Ismail, David Gumberg, and Jeffrey Czyz to discuss Newsletter #295.
News
Disclosure of free relay attack (1:22)
Transaction fee sponsorship improvements (9:55)
Mempool-based feerate estimation (34:49)
Selected Q&A from Bitcoin Stack Exchange
What are the risks of running a pre-SegWit node (0.12.1)? (50:30)
When is OP_RETURN cheaper than OP_FALSE OP_IF? (55:51)
Why does BIP-340 use secp256k1? (56:33)
What criteria does Bitcoin Core use to create block templates? (58:08)
How does the initialblockdownload field in the getblockchaininfo RPC work? (1:04:45)
Releases and r...
2024-03-281h 36Bitcoin Optech PodcastBitcoin Optech: Newsletter #294 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Sebastian Falbesoner, Anthony Towns, and Russell O’Connor to discuss Newsletter #294.
News
BIP324 proxy for light clients (1:20)
Overview of BTC Lisp (10:44)
Changes to services and client software
BitGo adds RBF support (38:59)
Phoenix Wallet v2.2.0 released (40:11)
Bitkey hardware signing device released (44:19)
Envoy v1.6.0 released (47:49)
VLS v0.11.0 released (49:22)
Portal hardware signing device announced (50:54)
Braiins mining pool adds Lightning support (51:44)
Ledger Bitcoin App 2.2.0 released (54:14)
Releases and release candidates
Bitcoin Core 26.1rc2 (55:51)
Bitcoin Core 27.0rc1 (56:48)
Notable code and documentation changes
Bitcoin Core #27375 (57:43)
Bitcoin Cor...
2024-03-211h 11Bitcoin Optech PodcastBitcoin Optech: Newsletter #293 RecapMark “Murch” Erhardt and Mike Schmidt are joined by ZmnSCPxj, Anthony Towns, and Armin Sabouri to discuss Newsletter #293.
News
Trustless onchain betting on potential soft forks (1:11)
Overview of Chia Lisp for Bitcoiners (14:06)
Bitcoin Core PR Review Club
Re enable `OP_CAT` (35:48)
Releases and release candidates
Core Lightning v24.02.1 (50:33)
Bitcoin Core 26.1rc1 (51:03)
Bitcoin Core 27.0rc1 (52:11)
Notable code and documentation changes
LND #8136 (54:58)
LND #8499 (57:26)
LDK #2916 (58:31)
2024-03-141h 00Bitcoin Optech PodcastBitcoin Optech: Newsletter #292 RecapMark “Murch” Erhardt and Dave Harding are joined by Josie Baker, Salvatore Ingala, and Fabian Jahr to discuss Newsletter #292.
News
Updating BIP21 `bitcoin:` URIs (18:07)
PSBTs for multiple concurrent MuSig2 signing sessions (46:30)
Discussion about adding more BIP editors (58:33)
GitLab backup for Bitcoin Core GitHub project (1:11)
Releases and release candidates
Eclair v0.10.0 (1:03:24)
Bitcoin Core 26.1rc1 (1:05:18)
Notable code and documentation changes
Bitcoin Core #29412 (1:06:53)
Eclair #2829 (1:17:29)
LND #8378 (1:19:06)
BIPs #1421 (1:20:28)
2024-03-071h 22Bitcoin Optech PodcastBitcoin Optech: Newsletter #289 RecapDave Harding and Mike Schmidt are joined by Gregory Sanders and Gloria Zhao to discuss Newsletter #289.
News
Ideas for relay enhancements after cluster mempool is deployed (1:11)
What would have happened if v3 semantics had been applied to anchor outputs a year ago? (25:55)
Bitcoin-Dev mailing list move (35:47)
I Love Free Software Day (37:56)
Bitcoin Core PR Review Club
Add `maxfeerate` and `maxburnamount` args to `submitpackage` (39:57)
Notable code and documentation changes
Bitcoin Core #28948 (46:24)
Core Lightning #6785 (49:39)
Eclair #2818 (50:18)
Eclair #2816 (52:29)
LND #8338 (56:20)
LDK #2856 (56:56)
LDK #2442 (59:09)
Rust Bitcoin #2451 (59:39)
2024-02-151h 02Bitcoin Optech PodcastBitcoin Optech: Newsletter #288 RecapDave Harding and Mike Schmidt are joined by Bastien Teinturier and Eugene Siegel to discuss Newsletter #288.
News
Public disclosure of a block stalling bug in Bitcoin Core affecting LN (1:26)
Securely opening zero-conf channels with v3 transactions (17:08)
Requirement to verify inputs use segwit in protocols vulnerable to txid malleability (27:00)
Proposal for replace by feerate to escape pinning (35:21)
Bitcoin-Dev mailing list migration update (51:15)
Releases and release candidates
LND v0.17.4-beta (1:00:02)
Notable code and documentation changes
Bitcoin Core #29189 (1:01:13)
Bitcoin Core #28956 (1:07:23)
Bitcoin Core #29347 (1:10:03)
Core Lightning #6985 (1:10:45)
Core Lightning #6904 (1:12:54)
Core Lightning #7022 (1:14:53)
Core Lightning #6936 (1:16:16)
LND #8345 (1:18:02)
2024-02-081h 21Bitcoin Optech PodcastBitcoin Optech: Newsletter #287 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao and Brandon Black to discuss Newsletter #287.
News
Kindred replace by fee (1:10)
Opposition to CTV based on commonly requiring exogenous fees (19:11)
Selected Q&A from Bitcoin Stack Exchange
How does block synchronization work in Bitcoin Core today? (28:14)
How does headers-first prevent disk-fill attack? (30:31)
Is BIP324 v2transport redundant on Tor and I2P connections? (33:57)
What's a rule of thumb for setting the maximum number of connections? (34:57)
Why isn't the upper bound (+2h) on the block timestamp set as a consensus rule? (37:01)
Sigop count and its influ...
2024-02-011h 02Bitcoin Optech PodcastBitcoin Optech: Newsletter #285 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Brandon Black, Chris Stewart, Gregory Sanders, and Oliver Gugger to discuss Newsletter #285.
News
Disclosure of past vulnerability in Core Lightning (2:15)
New LNHANCE combination soft fork proposed (4:59)
Proposal for 64-bit arithmetic soft fork (21:08)
Overview of cluster mempool proposal (38:25)
Updated specification and implementation of Bitcoin transaction compression (45:22)
Discussion of Miner Extractable Value (MEV) in non-zero ephemeral anchors (46:51)
Releases and release candidates
LDK 0.0.119 (56:24)
Notable code and documentation changes
Bitcoin Core #29058 (57:17)
Bitcoin Core #29200 (58:59)
Bitcoin Core #28890 (1:00:08)
Eclair #2808 (1:01:25)
LND #8188 (1:02:09)
LND #8096 (1:07:44)
LND #8095 (1:09:08)
2024-01-181h 15Bitcoin Optech PodcastBitcoin Optech: Newsletter #282: 2023 Year-in-Review Special RecapMark “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)
March
Hierarchical channels (50:57)
Summary 2023: Soft fork proposals (54:22)
April
Watchtower accountability proofs (1:04:24)
Route blinding (1:05:58)
MuSig2 (1:08:36)
RGB and Taproot Assets (1:12:47)
Channel splicing (1:16:06)
May
LSP specifications (1:21:10)
Payjoin (1:23:07)
Ark (1:27:40)
June
Silent payments (1:30:33)
Summary 2023: Security disclosures (1:32:34)
July
Validating Lightning Signer (1:36:10)
LN developer...
2023-12-272h 18Bitcoin Optech PodcastBitcoin Optech: Newsletter #281 RecapMark “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 (18:44)
Envoy 1.4 released (21:41)
BBQr encoding scheme announced (22:09)
Zeus v0.8.0 released (22:45)
Selected Q&A from Bitcoin Stack Exchange
What are all the rules related to CPFP fee bumping? (25:16)
How is the total number of RBF replaced transactions calculated? (29:41)
What types...
2023-12-191h 04Bitcoin Optech PodcastBitcoin Optech: Newsletter #280 RecapMark “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 #28848 (58:49)
LDK #2540 (59:49)
2023-12-071h 02Bitcoin Optech PodcastBitcoin Optech: Newsletter #279 RecapMark “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 full node on mainnet? (41:40)
What is the relation between nLockTime and nSequence? (44:40)
What would happen if we provide to OP_CHECKMULTISIG more than threshold number (m) of signatures? (52:18)
What is (mempool) policy? (54:30)
What does Pay to Co...
2023-11-301h 10Bitcoin Optech PodcastBitcoin Optech: Newsletter #275 RecapMark “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)
2023-11-0238 minBitcoin Optech PodcastBitcoin Optech: Newsletter #274 RecapMark “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 Stack Exchange
How does the Branch and Bound coin selection algorithm work? (52:17)
Why is each transaction broadcast twice in the Bitcoin network? (54:29)
Why are OP_MUL and OP_DIV disabled in Bitcoin? (56:57)
Why are hashSequence and hashPrevouts computed separately? (58:56)
Why d...
2023-10-261h 27Bitcoin Optech PodcastBitcoin Optech: Newsletter #272 RecapMike 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 (33:08)
Bitcoin Core GUI #764 (34:55)
Core Lightning #6676 (36:29)
2023-10-1238 minBitcoin Optech PodcastBitcoin Optech: Newsletter #270 RecapMark “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 scratch without downloading block headers first? (26:56)
Where is the bitcoin source code is the 21 million hard cap stated? (28:56)
Are blocks containing non-standard transactions relayed through the network or not as in th...
2023-09-2856 minBitcoin Optech PodcastBitcoin Optech: Newsletter #266 RecapMark “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...
2023-08-311h 13Bitcoin Optech PodcastBitcoin Optech: Newsletter #265 RecapMark “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)
2023-08-2458 minBitcoin Optech PodcastBitcoin Optech: Newsletter #263 RecapMark “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)
2023-08-101h 35Bitcoin Optech PodcastBitcoin Optech: Newsletter #261 RecapMark “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
...
2023-07-271h 19Bitcoin Optech PodcastBitcoin Optech: Newsletter #257 RecapMark “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 r...
2023-06-291h 47Bitcoin Optech PodcastBitcoin Optech: Newsletter #255 RecapMark “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)
2023-06-151h 18Bitcoin Optech PodcastBitcoin Optech: Newsletter #253 RecapMark “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 h...
2023-06-011h 46Bitcoin Optech PodcastBitcoin Optech: Newsletter #252 RecapMark “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...
2023-05-251h 05Bitcoin Optech PodcastBitcoin Optech: Newsletter #251 RecapMark “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 #2...
2023-05-181h 13Bitcoin Optech PodcastBitcoin Optech: Newsletter #250 RecapMark “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)
2023-05-1156 minBitcoin Optech PodcastBitcoin Optech: Newsletter #249 RecapMark “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)
2023-05-041h 17Bitcoin Optech PodcastBitcoin Optech: Newsletter #248 RecapMark “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)
2023-04-2734 minBitcoin Optech PodcastBitcoin Optech: Newsletter #244 RecapMark “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)
Releas...
2023-03-301h 21Bitcoin Optech PodcastBitcoin Optech: Newsletter #241 RecapMark “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)
2023-03-1344 minBitcoin Optech PodcastBitcoin Optech: Newsletter #240 RecapMark "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)
2023-03-0621 minBitcoin Optech PodcastBitcoin Optech: Newsletter #239 RecapJoin 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 Co...
2023-02-271h 01Bitcoin Optech PodcastBitcoin Optech: Newsletter #238 RecapMark “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...
2023-02-161h 03Bitcoin Optech PodcastBitcoin Optech: Newsletter #235 RecapMark “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 requi...
2023-01-261h 02Bitcoin Optech PodcastBitcoin Optech: Newsletter #231: 2022 Year-in-Review Special RecapMark “Murch” Erhardt and Mike Schmidt are joined by Dave Harding to discuss Newsletter #231.
January
Stateless invoices (7:37)
Legal defense fund (11:21)
February
Fee sponsorship (12:45)
Phantom node payments (15:14)
March
LN pathfinding (17:37)
Zero-conf channels (21:12)
Summary 2022: Replace-By-Fee (24:02)
April
Silent payments (31:17)
Taro (35:06)
Quantum-safe key exchange (45:29)
May
MuSig2 (48:51)
Package relay (52:12)
Bitcoin kernel library (54:49)
June
LN protocol developers meeting (57:46)
July
Onion message rate limiting (1:03:58)
Miniscript descripto...
2022-12-222h 06Bitcoin Optech PodcastBitcoin Optech: Newsletter #230 RecapMark “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) chann...
2022-12-151h 28Bitcoin Optech PodcastBitcoin Optech: Newsletter #225 RecapMark “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)
2022-11-1043 minBitcoin Optech PodcastBitcoin Optech: Newsletter #224 RecapMark “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)
2022-11-031h 13Bitcoin Optech PodcastBitcoin Optech: Newsletter #222 RecapMark “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...
2022-10-201h 27Bitcoin Optech PodcastBitcoin Optech: Newsletter #219 RecapMark “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 candi...
2022-09-291h 14Bitcoin Optech PodcastBitcoin Optech: Newsletter #217 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Larry Ruane to discuss Newsletter #217.
Bitcoin Core PR Review Club
Reduce bandwidth during initial headers sync when a block is found (4:58)
Releases and release candidates
LDK 0.0.111 (25:09)
Notable code and documentation changes
Bitcoin Core #25614 (26:20)
Bitcoin Core #25768 (30:41)
Bitcoin Core #19602 (34:44)
Eclair #2406 (39:27)
Eclair #2190 (44:26)
Rust Bitcoin #1196 (46:51)
2022-09-1550 minBitcoin Optech PodcastBitcoin Optech: Newsletter #215 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Craig Raw to discuss Newsletter #215.
News
Wallet label export format (1:00)
Selected Q&A from Bitcoin Stack Exchange
Why isn't it possible to add an OP_RETURN commitment (or some arbitrary script) inside a taproot script path with a descriptor? (23:12)
Why does Bitcoin Core rebroadcast transactions? (24:56)
When did Bitcoin Core deprecate the mining function? (33:27)
UTXO spendable by me or deposit to exchange after 5 years? (35:50)
What was the bug for the Bitcoin value overflow in 2010? (41:03)
Releases and release candidates
LND 0.15.1-beta (45:13)
Notab...
2022-09-011h 04Bitcoin Optech PodcastBitcoin Optech: Newsletter #213 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Lloyd Fournier to discuss Newsletter #213.
News
Using Bitcoin-compatible BLS signatures for DLCs (1:59)
Releases and release candidates
Rust Bitcoin 0.29 (40:47)
Core Lightning 0.12.0rc2 (43:02)
Notable code and documentation changes
Bitcoin Core #23480 (43:19)
Bitcoin Core #22751 (44:50)
Eclair #2273 (47:34)
Eclair #2361 (50:27)
LND #6810 (52:03)
LND #6816 (53:10)
BDK #640 (53:58)
2022-08-1855 minBitcoin Optech PodcastBitcoin Optech: Newsletter #212 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Peter Todd, Larry Ruane, and Gloria Zhao to discuss Newsletter #212.
News
Lowering the default minimum transaction relay feerate (2:30)
Bitcoin Core PR Review Club
Decouple validation cache initialization from ArgsManager (31:25)
Notable code and documentation changes
Bitcoin Core #25610 (45:50)
Bitcoin Core #24584 (49:27)
Core Lightning #5071 (53:55)
BDK #645 (55:05)
BOLTs #911 (56:02)
2022-08-111h 00Bitcoin Optech PodcastBitcoin Optech: Newsletter #210 RecapMark “Murch” Erhardt and Mike Schmidt are joined by Ruben Somsen to discuss Newsletter #210.
News
Multiformat single-sig message signing (2:05)
Proof of micro-burn (9:43)
Selected Q&A from Bitcoin Stack Exchange
Why do invalid signatures in `OP_CHECKSIGADD` not push to the stack? (30:41)
What are packages in Bitcoin Core and what is their use case? (34:17)
How much blockspace would it take to spend the complete UTXO set? (37:43)
Does an uneconomical output need to be kept in the UTXO set? (39:37)
Is there code in libsecp256k1 that should be moved to the Bitcoin Core codeb...
2022-07-2758 min