Bitcoin Optech Podcast

By Bitcoin OptechNews Tech News

Bitcoin Optech Podcast episodes

February 22, 2024Bitcoin Optech: Newsletter #290 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, callebtc, Chris Stewart, Fabian Jahr, and Pierre Corbin to discuss ⁠Newsletter #290⁠.
News
DNS-based human-readable Bitcoin payment instructions (1:41)

Thinking about mempool incentive compatibility (9:50)

Cashu and other ecash system design discussion (29:15)

Continued discussion about 64-bit arithmetic and `OP_INOUT_AMOUNT` opcode (39:52)

Improved reproducible ASMap creation process (49:17)
Changes to services and client software
Multiparty coordination protocol NWC announced (1:11:00)

Mutiny Wallet v0.5.7 released (1:19:07)

GroupHug transaction batching service (1:19:48)

Boltz announces taproot swaps (1:22:43)
Releases and release candidates
Core Lightning 24.02rc1 (1:24:07)
Notable code and documentation changes
Bitcoin Core #27877 (1:24:58)

BOLTs #851 (1:29:00)
1 hr 33 min
February 15, 2024Bitcoin Optech: Newsletter #289 Recap
Dave 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)
1 hr 3 min
February 08, 2024Bitcoin Optech: Newsletter #288 Recap
Dave 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)
1 hr 22 min
February 01, 2024Bitcoin Optech: Newsletter #287 Recap
Mark “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 influence on transaction selection? (43:22)
Releases and release candidates
HWI 2.4.0 (48:03)
Notable code and documentation changes
Bitcoin Core #29291 (48:41)

Eclair #2811 (49:23)

LND #8167 (52:10)

LND #7733 (53:01)

LND #8275 (54:01)

Rust Bitcoin #2366 (56:34)

HWI #716 (58:35)

BDK #1172 (58:49)

BINANAs #3 (59:29)
1 hr 3 min
January 26, 2024Bitcoin Optech: Newsletter #286 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Niklas Gögge, Bastien Teinturier, Anthony Towns, Gloria Zhao, Nicholas Gregory, and Tom Trevethan to discuss ⁠Newsletter #286⁠.
News
Disclosure of fixed consensus failure in btcd (1:33)

Proposed changes to LN for v3 relay and ephemeral anchors (13:40)

New documentation repository (29:56)
Changes to services and client software
Envoy 1.5 released (45:41)

Liana v4.0 released (46:39)

Mercury Layer announced (47:46)

AQUA wallet announced (57:18)

Samourai Wallet announces atomic swap feature (57:49)
Releases and release candidates
LDK 0.0.120 (58:37)

HWI 2.4.0-rc1 (59:11)
Notable code and documentation changes
Bitcoin Core #29239 (59:37)

Eclair #2810 (1:02:16)

LDK #2791 (1:05:32)

Rust Bitcoin #2230 (1:07:43)
1 hr 11 min
January 18, 2024Bitcoin Optech: Newsletter #285 Recap
Mark “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)
1 hr 16 min
January 11, 2024Bitcoin Optech: Newsletter #284 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Gloria Zhao, Gregory Sanders, Dave Harding, and Stéphan Vuylsteke to discuss Newsletter #284.
News
Discussion about LN anchors and v3 transaction relay proposal (1:03)

LN-Symmetry research implementation (35:03)
Bitcoin Core PR Review Club
Nuke adjusted time (attempt 2) (50:01)
Notable code and documentation changes
LND #8308 (1:05:06)
1 hr 9 min
January 04, 2024Bitcoin Optech: Newsletter #283 Recap
Mark “Murch” Erhardt and Mike Schmidt are joined by Niklas Gögge, Antoine Riard, Abubakar Sadiq Ismail, Gloria Zhao, Salvatore Ingala, Johan Torås Halseth and SeedHammer Team to discuss Newsletter #283.

News
Disclosure of past LND vulnerabilities (2:07)

Fee-dependent timelocks (25:09)

Cluster fee estimation (8:32)

How to specify unspendable keys in descriptors (17:48)

V3 transaction pinning costs (34:14)

Descriptors in PSBT draft BIP (48:19)

Verification of arbitrary programs using proposed opcode from MATT (57:52)

Pool exit payment batching with delegation using fraud proofs (1:04:59)

New coin selection strategies (1:14:36)
Releases and release candidates
Core Lightning 23.11.2 (1:17:57)

Libsecp256k1 0.4.1 (1:18:14)
Notable code and documentation changes
Bitcoin Core #28349 (1:19:06)

Core Lightning #6957 (1:20:21)

Core Lightning #6869 (1:21:15)

Eclair #2796 (1:21:47)

Eclair #2787 (1:22:23)

LDK #2781 (1:23:14)

LDK #2723 (1:24:16)

BIPs #1504 (1:25:00)
1 hr 27 min
December 27, 2023Bitcoin Optech: Newsletter #282: 2023 Year-in-Review Special Recap
Mark “Murch” Erhardt, Dave Harding, and Mike Schmidt discuss ⁠Newsletter #282: 2023 Year-in-Review Special⁠.

January
Bitcoin Inquisition (10:59)

Swap-in-potentiam (14:03)

BIP329 wallet label export format (19:32)
February
Ordinals and inscriptions (20:22)

Bitcoin Search, ChatBTC, and TL;DR (41:50)

Peer storage backups (43:40)

LN quality of service (44:10)

HTLC endorsement (47:31)

Codex32 (48:33)
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 meeting (1:38:00)
August
Onion messages (1:38:28)

Outdated backup proofs (1:41:52)

Simple taproot channels (1:44:39)
September
Compressed Bitcoin transactions (1:46:40)
Summary 2023: Major releases of popular infrastructure projects (1:48:19)
October
Payment switching and splitting (1:49:46)

Sidepools (1:51:30)

AssumeUTXO (1:55:28)

Version 2 P2P transport (1:55:51)

Miniscript (1:57:18)

State compression and BitVM (2:00:07)
November
Offers (2:05:53)

Liquidity advertisements (2:08:26)
Summary 2023: Bitcoin Optech (1:11)
December
Cluster mempool (2:11:10)

Warnet (2:13:12)
2 hr 19 min
December 19, 2023Bitcoin Optech: Newsletter #281 Recap
Mark “Murch” Erhardt and Dave Harding are joined by Bastien Teinturier and Rodolfo Novak to discuss Newsletter #281.

News
Discussion about griefing liquidity ads (0:46)
Changes to services and client software
Stratum v2 mining pool launches (15:43)

Bitcoin network simulation tool warnet announced (16:31)

Payjoin client for Bitcoin Core released (17:30)

Call for community block arrival timestamps (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 of RBF exist and which one does Bitcoin Core support and use by default? (31:37)

What is the Block 1,983,702 Problem? (34:48)

What are hash functions used for in bitcoin? (45:12)
Releases and release candidates
LND 0.17.3-beta (51:59)
Notable code and documentation changes
LDK #2685 (52:22)

Libsecp256k1 #1446 (53:04)

BTCPay Server #5389 (53:36)

BTCPay Server #5490 (59:54)
1 hr 5 min