Bitcoin Optech Podcast

Mark “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 after a block height? (52:09)

● Configure Bitcoin Core to use onion nodes in addition to IPv4 and IPv6 nodes? (53:45)

Releases and release candidates

● Bitcoin Core 29.1rc2 (54:22)

● Core Lightning v25.09rc4 (56:45)

Notable code and documentation changes

● Bitcoin Core #31802 (57:37)

● LDK #3979 (1:04:46)

● LND #10102 (1:06:19)

● Rust Bitcoin #4907 (1:07:04)

Mark “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)

Gloria 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 2.2.0 (1:17:44)

● Bitcoin Core 29.1rc1 (1:18:13)

Notable code and documentation changes

● Bitcoin Core #32941 (1:21:11)

● Bitcoin Core #31385 (1:24:06)

● Bitcoin Core #31244 (1:26:38)

● Bitcoin Core #30635 (1:29:54)

● Bitcoin Core #28944 (1:32:29)

● Eclair #3133 (1:35:08)

● LND #10097 (1:36:23)

● LND #9625 (1:38:12)

● Rust Bitcoin #4730 (1:38:43)

● BLIPs #55 (1:40:57)

Correction (1:42:03)

Mark “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 documentation changes

● Bitcoin Core #29954 (1:48:12)

● Bitcoin Core #33004 (1:49:13)

● LDK #3246 (1:52:37)

● LDK #3892 (1:53:35)

● LDK #3662 (1:54:31)

Mark “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 release candidates

● Libsecp256k1 v0.7.0 (1:04:26)

Notable code and documentation changes

● Bitcoin Core #32521 (1:05:16)

● Bitcoin Core #31829 (1:15:00)

● LDK #3801 (1:19:51)

● LDK #3842 (1:21:11)

● BIPs #1890 (1:21:57)

● BOLTs #1232 (1:23:53)

Mark “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 #10001 (54:30)

Mark “Murch” Erhardt and Mike Schmidt are joined by Josh Doman and Gloria Zhao to discuss ⁠Newsletter #362⁠.

News

● Compressed descriptors (0:34)

Bitcoin Core PR Review Club

● Improve TxOrphanage denial of service bounds (9:14)

Releases and release candidates

● LND v0.19.2-beta.rc2 (46:22)

Notable code and documentation changes

● Core Lightning #8377 (47:17)

● BDK #1957 (50:41)

● BIPs #1888 (51:18)

Sanket 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)

Notable code and documentation changes

● Bitcoin Core #32540 (2:13:29)

● Bitcoin Core #32638 (2:14:47)

● Bitcoin Core #32819 (2:15:25)

● LDK #3618 (2:17:41)

Mark “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 release candidates

● Bitcoin Core 28.2 (57:51)

Notable code and documentation changes

● Bitcoin Core #31981 (59:21)

● Eclair #3109 (1:00:48)

● LND #9950 (1:01:31)

● LDK #3868 (1:01:56)

● LDK #3873 (1:03:10)

● Libsecp256k1 #1678 (1:04:11)

● BIPs #1803 (1:06:21)

Mark “Murch” Erhardt and Mike Schmidt are joined by Bryan Bishop, Robin Linus, and Rene Pickhardt to discuss ⁠Newsletter #359⁠.

News

● Proposal to restrict access to Bitcoin Core Project discussion (1:11)

● Improvements to BitVM-style contracts (21:17)

● Channel rebalancing research (41:57)

Changes to services and client software

● Cove v1.0.0 released (1:03:58)

● Liana v11.0 released (1:04:59)

● Stratum v2 STARK proof demo (1:06:48)

● Breez SDK adds BOLT12 and BIP353 (1:08:41)

Releases and release candidates

● Core Lightning 25.05 (1:09:51)

Notable code and documentation changes

● Eclair #3110 (1:11:32)

● Eclair #3101 (1:12:41)

● LDK #3817 (1:13:35)

● LDK #3623 (1:14:04)

● BTCPay Server #6755 (1:15:11)

● Rust libsecp256k1 #798 (1:15:54)