Bitcoin Optech Podcast

Gustavo Flores Echaiz and Brandon Black are joined by Adam Gibson, Vincenzo Palazzo, and João Dias to discuss Newsletter #428.

News

● Trust-minimized exits from a single-issuer layer 2 (1:32)

● Descriptor syntax for hash preimages (18:03)

Changes to services and client software

● Ibis Wallet v5.0-beta released (26:31)

● Landfall wallet for Lightning mining payouts (28:57)

● rbitcoin 0.8.0 released (38:44)

Releases and release candidates

● Eclair 0.14.4 (43:18)

● BDK chain 0.23.4 (45:37)

● LND v0.21.5-beta.rc1 (47:09)

Notable code and documentation changes

● Eclair #3409 (50:16)

● Eclair #3411 (52:20)

● LDK #5126 (55:03)

● LND #10919 (56:19)

● BTCPay Server #7679 (1:01:06)

● BTCPay Server #7684 (1:02:39)

● BDK #2325 (1:04:18)

● BOLTs #1357 (1:07:13)

● BOLTs #1352 (1:10:03)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Erick Cestari and Adam Gibson to discuss Newsletter #427.

News

● Disclosure of two DoS vulnerabilities fixed in Eclair v0.14.1 (0:53)

● Offchain contracts in Lightning channels (12:57)

Releases and release candidates

● Bitcoin Core 32.0rc4 (43:15)

Notable code and documentation changes

● Eclair #3396 (49:25)

● Eclair #3399 (53:23)

● Eclair #3395 (57:23)

● Eclair #3401 (59:09)

● LDK #5080 (1:01:03)

● LDK #5087 (1:02:46)

● LND #11068 (1:05:04)

● Rust Bitcoin #6956 (1:07:44)

● BDK #2319 (1:10:22)

Gustavo Flores Echaiz is joined by Clara Shikhelman and Elias Rohrer to discuss ⁠Newsletter #426⁠.

News

● Dynamic one-byte message type IDs for BIP324 (45:02)

● Discussion of conventions for tagged hash tags in BIPs (49:04)

● Proposal for onchain, private bitcoin transfers with no consensus changes (1:15)

Releases and release candidates

● Bitcoin Core 32.0rc3 (53:34)

● Core Lightning 26.06.9 (54:38)

● LDK v0.3-rc3 (23:38)

● LDK v0.2.7 (24:33)

● BTCPay Server 2.4.5 (56:55)

Notable code and documentation changes

● Bitcoin Core #36277 (59:51)

● Bitcoin Core #36365 (1:05:09)

● Bitcoin Core #36338 (1:07:53)

● Bitcoin Core #32895 (1:10:38)

● Core Lightning #9582 (1:12:38)

● Eclair #3390 (1:18:03)

● LDK #5057 (33:00)

● LDK #5042 (35:55)

● LDK #5046 (38:25)

● LDK #5028 (41:43)

● LND #11290 (1:20:41)

Gustavo Flores Echaiz and Brandon Black are joined by Matt Morehouse to discuss ⁠Newsletter #425⁠.

News

● Disclosure of two DoS vulnerabilities in Eclair (1:01)

● Proposal for wallet label synchronization (15:25)

Changing consensus

● Continued discussion of PQC output types (21:36)

● Block-wide signature aggregation via SNARKs (27:17)

● Bounds on chain length with BIP54 time warp fixes (35:19)

● Comparing covenant proposals for vaults (39:23)

● Depots for probabilistic Lightning channels (43:18)

Releases and release candidates

● LND v0.21.4-beta.rc1 (48:40)

● LND v0.20.5-beta.rc1 (50:29)

Notable code and documentation changes

● Bitcoin Core #29278 (51:55)

● Bitcoin Core #35984 (53:43)

● Bitcoin Core #35301 (56:45)

● Bitcoin Core #36312 (58:51)

● Bitcoin Core #36284 (1:01:59)

● Bitcoin Core #35752 (1:07:47)

● Bitcoin Core #35813 (1:11:46)

● BIPs #2276 (1:13:07)

● LDK #4993 (1:16:39)

● LND #11173 (1:19:40)

● LND #11190 (1:22:12)

● LND #11212 (1:27:37)

● LND #11258 (1:29:58)

Gustavo Flores Echaiz and Mike Schmidt are joined by Ahmet Kurt and Jan B to discuss Newsletter #424.

News

● Proposal for a post-quantum Lightning Network (1:10)

Selected Q&A from Bitcoin Stack Exchange

● What would be a drawback if sum instead of SHA256 of amounts was used in the taproot signature message? (36:18)

● Post-BIP110 fork is it necessary to resync from block 0? (39:32)

● Can a Bitcoin node build a partial UTXO set from only the most recent blocks and use it to validate new transactions? (42:16)

Releases and release candidates

● Bitcoin Core 32.0rc2 (21:13)

● Core Lightning 26.06.8 (45:36)

● LDK v0.3-rc2 (47:15)

Notable code and documentation changes

● Bitcoin Core #34566 (51:31)

● BIPs #1951 (54:14)

● BIPs #2224 (57:45)

● Core Lightning #9507 (1:02:00)

● Core Lightning #9508 (1:07:35)

● Core Lightning #9509 (1:12:02)

● Core Lightning #9510 (1:16:03)

● Core Lightning #9513 (1:20:01)

● LND #11198 (1:21:47)

● LND #11146 (1:24:15)

● LND #11132 (1:27:20)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Davidson Souza, Eric Price, and PortlandHODL to discuss ⁠Newsletter #423⁠.

News

● Vardiff controllers that strand slowing miners (23:06)

● Improvements in Utreexo initial block download (1:18)

● New BIP draft for unspendable internal keys (1:17:51)

Changes to services and client software

● BitBoxApp adds Spark-based Lightning payments (1:24:09)

● Covenants.diy script editor (1:28:40)

● EntropyLab offline key calculator (59:46)

Releases and release candidates

● Eclair 0.14.3 (1:31:10)

Notable code and documentation changes

● Bitcoin Core #35445 (1:33:34)

● Bitcoin Core #36076 (1:38:51)

● Bitcoin Core #36150 (1:42:18)

● Bitcoin Core #36174 (1:44:37)

● Bitcoin Core #34743 (1:46:13)

● Bitcoin Core #36081 (1:48:07)

● Bitcoin Core #35975 (1:48:59)

● BIPs #2241 (1:50:04)

● BIPs #2258 (1:53:09)

● Eclair #3380 (1:56:33)

● Eclair #3376 (1:57:37)

● Eclair #3372 (2:04:34)

● LND #11163 (2:05:57)

● BDK #2246 (2:07:44)

Mark “Murch” Erhardt and Mike Schmidt are joined by Adam Gibson and Rob Segers to discuss Newsletter #422.

News

● A protocol for probabilistic coinjoin and covert betting (1:14)

● Update on silent payments light clients (43:26)

Releases and release candidates

● LDK v0.3-rc1 (1:04:06)

● LDK v0.2.6 (1:05:58)

● BTCPay Server 2.4.4 (1:07:44)

Notable code and documentation changes

● Bitcoin Core #35949 (1:13:04)

● Bitcoin Core #34931 (1:15:11)

● Bitcoin Core #36048 (1:18:14)

● Bitcoin Core #36123 (1:21:12)

● Bitcoin Core #36176 (1:22:32)

● Core Lightning #9434 (1:24:49)

● LND #11061 (1:26:29)

● LND #11125 (1:27:23)

● LND #11064 (1:28:33)

● BTCPay Server #7561 (1:29:31)

● BTCPay Server #7559 (1:31:03)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by average_gary, Erick Cestari, Conduition, and Greg Sanders to discuss Newsletter #421.

News

● Using silent payments for miner payouts in coinbase transaction (2:19)

● Responsible disclosure of a denial-of-service vulnerability in CLN (27:42)

Changing consensus

● Continued discussion of PQC output types (54:03)

● DropKick commit/reveal PQC rescue (1:14:08)

● SHRINCS draft BIP (1:35:48)

● BIP448 and CSFS/CTV demos and applications (37:55)

Releases and release candidates

● Core Lightning 26.06.7 (1:51:35)

● LND v0.21.3-beta (1:55:32)

● LND v0.20.4-beta (1:55:37)

Notable code and documentation changes

● Bitcoin Core #36111 (1:58:21)

● Bitcoin Core #36032 (2:01:17)

● Core Lightning #9435 (2:04:52)

● Eclair #3368 (2:08:10)

● Eclair #3366 (2:10:54)

● LND #11090 (2:14:55)

● LND #11140 (2:20:33)

● HWI #792 (2:23:55)

● BDK #2262 (2:25:48)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Níckolas Goline, Optout, Abubakar Sadiq Ismail, and Moonsettler to discuss Newsletter #420.

Action items

● Prepare for an upcoming Core Lightning security release (1:46)

News

● Discussion on universal opt-in replay protection (53:54)

● HWI repository to enter maintenance mode (1:24:05)

● Request for comments on using block-range filters (19:06)

Releases and release candidates

● BTCPay Server 2.4.3 (1:28:31)

● Eclair 0.14.2 (1:29:09)

Notable code and documentation changes

● Bitcoin Core #34075 (31:21)

● Bitcoin Core #35730 (1:32:02)

● Bitcoin Core #35580 (1:34:03)

● Bitcoin Core #35665 (1:38:36)

● Bitcoin Core #35933 (1:43:02)

● Core Lightning #9374 (1:45:58)

● Eclair #3342 (1:47:15)

● Eclair #3321 (1:48:55)

● LND #11008 (1:50:44)

● HWI #841 (1:52:09)

● HWI #849 (1:53:48)

● Rust Bitcoin #6755 (1:55:12)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Bastien Teinturier, Salvatore Ingala, and spacebear to discuss Newsletter #419.

News

● Reorg vulnerability in LND channel closes (1:13)

● Draft BIP for `rawtr()` output script descriptor (1:14:36)

Changes to services and client software

● Payjoin Dev Kit (rust-payjoin) 1.0.0 released (55:33)

● Silent Payments sender plugin for Electrum (1:21:41)

● Superscalar implementation announced (1:22:34)

● Cofund multisig wallet announced (1:24:57)

● Lexe adds human-readable addresses and LNURL-withdraw (1:25:55)

● Ledger Bitcoin app 2.5.0 adds human-readable policy descriptions (37:17)

● Bark 0.5.0 released (1:27:34)

● Bitcoin-PIR for private UTXO queries (1:28:16)

● OP_TEMPLATEHASH Ark demonstration (1:29:44)

● libshrincs formally verified hash-based signatures (1:34:00)

Notable code and documentation changes

● Bitcoin Core #32784 (1:38:08)

● Bitcoin Core #35797 (1:40:45)

● Bitcoin Core #35531 (1:44:14)

● Bitcoin Core #35889 (1:48:44)

● Bitcoin Core #35605 (1:51:06)

● Eclair #3352 (12:15)

● Eclair #3351 (20:31)

● Eclair #3345 (23:16)

● LND #8754 (1:54:23)

● LND #11065 (1:55:47)

● HWI #842 (1:57:04)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Michael Ford (fanquake) and Martin Zumsande to discuss ⁠Newsletter #418⁠.

News

● Message transfer failure (33:07)

● Static Bitcoin Core binaries available for testing (1:19)

● Replacing per-peer transaction rate-limiting with global rate limits (18:44)

Releases and release candidates

● BTCPay Server 2.4.2 (43:16)

● LND v0.21.2-beta (45:45)

● LND v0.20.3-beta (45:45)

Notable code and documentation changes

● Bitcoin Core #35493 (48:10)

● Core Lightning #9150 (50:57)

● BIPs #2248 (54:13)

● BIPs #2225 (56:07)

● Eclair #3346 (58:50)

● Eclair #3341 (1:02:22)

● LND #11019 (1:05:18)

● LND #11023 (1:09:03)

● Libsecp256k1 #1904 (1:11:49)

● HWI #839 (1:13:58)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Conduition, Ram, and Fabian Jahr to discuss Newsletter #417.

News

● Draft BIP for stale tip relay (29:26)

Changing consensus

● CISA for taproot keypath spends (BIP460) (40:38)

● Segwit commitment to post-quantum witness data (57:51)

● PQC output type discussion (1:45)

● Input-triggered transaction expiry (1:03:36)

● Layered quantum recovery of hashed addresses (21:53)

● Segregated Data (SegData) BIP draft (1:08:33)

Releases and release candidates

● Libsecp256k1 0.8.0 (1:15:24)

Notable code and documentation changes

● Bitcoin Core #35501 (1:18:10)

● Core Lightning #9298 (1:22:47)

● Core Lightning #9353 (1:25:02)

● Eclair #3336 (1:26:15)

● LND #10942 (1:27:53)

● LND #10992 (1:29:35)

● Rust Bitcoin #6364 (1:31:55)

● Rust Bitcoin #6642 (1:33:22)

● BTCPay Server #7491 (1:36:52)

● BTCPay Server #7488 (1:38:35)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Rob Hamilton, PortlandHODL, Chandra Pratap, and fabohax to discuss Newsletter #416.

Action items

● Move funds secured by COLDCARD-generated keys (1:07)

News

● Wallets generated by COLDCARD at risk of theft (2:18)

● Disclosure of two DoS vulnerabilities in Core Lightning (36:26)

● Proof of concept for a zero-knowledge proof of reserves (49:54)

Selected Q&A from Bitcoin Stack Exchange

● What is Bitcoin's objective definition of transaction neutrality? (1:03:07)

● Why does BIP110's decentralization benefit not outweigh its impact on transaction neutrality? (1:05:17)

● Why does BIP110 require a 55% signaling threshold if its nodes reject non-signaling blocks? (1:09:46)

● Why use ElligatorSwift encoding in BIP324? (1:17:12)

● Was the OP_SUCCESSx reservation in BIP342 designed with specific opcode families in mind? (1:25:36)

● What is the difference between the long-term feerate and the discard feerate? (1:29:14)

● What is the quickest method for migrating a legacy wallet to a descriptor wallet on a pruned node? (1:32:40)

● Is there historical data on orphan/stale block rates during high-fee periods? (1:36:09)

Releases and release candidates

● BTCPay Server 2.4.1 (1:41:25)

● Eclair 0.14.1 (1:42:14)

Notable code and documentation changes

● Bitcoin Core #34628 (1:44:26)

● Bitcoin Core #28463 (1:49:49)

● Bitcoin Core #32800 (1:54:18)

● Bitcoin Core #34683 (1:56:54)

● Bitcoin Core #33014 (1:58:09)

● Eclair #3325 (1:59:31)

● BOLTs #1346 (2:00:57)

● BOLTs #1344 (2:01:01)

● BOLTs #1343 (2:04:14)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Fabian Jahr, Kruw, and Mojo to discuss ⁠Newsletter #415⁠.

News

● Draft BIP for full aggregation of BIP340 signatures (1:32)

Changes to services and client software

● Wasabi Wallet 2.8.0 released (33:11)

● Coinswap v0.2.2 released (46:08)

● Go secp256k1 library announced (1:08:38)

● ASMap dashboard announced (21:06)

● Wavelength alpha released (1:10:01)

Releases and release candidates

● Core Lightning v26.06.6 (1:13:06)

● Bitcoin Inquisition 29.4 (1:16:03)

Notable code and documentation changes

● Bitcoin Core #35215 (1:17:11)

● Bitcoin Core #35766 (1:21:16)

● BIPs #2075 (1:22:44)

● BIPs #2204 (1:25:46)

● Core Lightning #8935 (1:28:43)

● Core Lightning #9324 (1:33:14)

● libsecp256k1 #1765 (1:35:16)

● Rust Bitcoin #6317 (1:41:46)

● BTCPay Server #7457 (1:44:10)

● BLIPs #71 (1:46:24)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Keagan McClelland and Andrew Toth to discuss Newsletter #414.

News

● Formal verification of the Bitcoin protocol (1:11)

Releases and release candidates

● Bitcoin Core 30.3 (39:42)

● Bitcoin Core 29.4 (39:43)

Notable code and documentation changes

● Bitcoin Core #35295 (52:43)

● Bitcoin Core #34897 (1:13:54)

● Bitcoin Core #35406 (1:16:13)

● Bitcoin Core #35380 (1:21:36)

● Bitcoin Core #35568 (1:07:36)

● Bitcoin Core #34538 (1:23:43)

● BIPs #2208 (1:25:52)

● LND #10962 (1:27:27)

● LND #10897 (1:30:12)

● BINANAs #21 (1:31:34)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Sjors Provoost to discuss Newsletter #413.

News

● Using fountain codes for IBD (13:53)

Releases and release candidates

● Bitcoin Core 31.1 (22:52)

● LND v0.20.2-beta (28:49)

Notable code and documentation changes

● Bitcoin Core #32489 (31:11)

● Bitcoin Core #32606 (33:59)

● Bitcoin Core #34020 (0:48)

● Core Lightning #9104 (42:55)

● Eclair #3323 (45:11)

● LND #10832 (46:24)

Mark “Murch” Erhardt and Mike Schmidt are joined by Conduition and Jeremy Rubin to discuss Newsletter #412.

Changing consensus

● Benchmarking SLH-DSA STARK aggregation (1:05)

● Bird of Prey 2 (BoP-2) non-malleable schnorr and PQ signatures (10:21)

● Lattice-based signatures (19:41)

● Public key recovery for P2MR EC leaves (25:50)

● Aligning privacy incentives in P2MR (30:48)

● Prohibit merkle internal node preimages that encode minimal 64-byte transactions (49:38)

● Triggering EC disabling with a NUMS point spend or hashrate majority (37:36)

Releases and release candidates

● Bitcoin Core 31.1rc1 (1:32:43)

● Bitcoin Core 30.3rc1 (1:32:48)

● Bitcoin Core 29.4rc1 (1:32:52)

● Core Lightning v26.06.2 (1:36:01)

● LND v0.20.2-beta.rc1 (1:36:39)

● LND v0.21.1-beta (1:38:10)

● LDK v0.2.4 (1:38:57)

Notable code and documentation changes

● Bitcoin Core #35266 (1:40:00)

● Bitcoin Core #35550 (1:41:10)

● Bitcoin Core #35610 (1:42:15)

● BIPs #2196 (1:43:52)

● BIPs #2165 (1:47:46)

● BIPs #2201 (1:50:13)

● LND #10900 (1:51:20)

● LND #10927 (1:52:37)

● LDK #4748 (1:54:13)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Nishant Bansal and Matthew Zipkin to discuss Newsletter #411.

News

● LND zero-timestamp gossip DoS disclosure (1:00)

Selected Q&A from Bitcoin Stack Exchange

● Is it a bug that `OP_IF` is part of the tapscript opcodes? (34:02)

● Why would forbidding `OP_IF` in tapscript be a problem? (41:11)

● Does a softfork always succeed? (49:17)

● How to set up Bitcoin Core to mine a valid block after the BIP110 activation in August 2026? (56:44)

● Are BIP110 blocks on a branch with lower difficulty valid? (59:47)

● What is the story behind Bitcoin test networks? (1:07:41)

● Why was `-datacarriersize` redefined in 2022, and why was the 2023 proposal to expand it not merged? (1:15:35)

● Are chains of 26 unconfirmed transactions prohibited by the wallet in Bitcoin Core 31.0? (1:25:33)

● Are there changes in Bitcoin Core 29.0 that affect memory usage? (1:28:20)

● What is Bitcoin Core's release schedule? (1:30:21)

Releases and release candidates

● LDK v0.1.10 (1:34:50)

● LDK v0.2.3 (1:35:31)

● BTCPay Server 2.4.0 (1:37:04)

Notable code and documentation changes

● Bitcoin Core #35070 (1:39:27)

● Bitcoin Core #35182 (13:15)

● BIPs #2198 (1:46:09)

● LDK #4713 (1:51:17)

● LDK #4684 (1:53:47)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by rkrux, Roland Bewick, and Steven Roose to discuss ⁠Newsletter #410⁠.

News

● Discussion of removing RBF signaling from wallet transactions (0:57)

Changes to services and client software

● Sparrow Wallet 2.5.0 adds silent payments receiving (59:55)

● Bark live on Bitcoin mainnet (29:46)

● Arké Ark wallet announced (32:18)

● Noah Ark wallet announced (31:52)

● Alby Hub v1.23.0 released (15:00)

● JoinMarket NG 0.32.0 released (1:01:02)

Notable code and documentation changes

● Bitcoin Core #35221 (1:02:13)

● Bitcoin Core #35254 (1:06:59)

● Bitcoin Core #35498 (1:09:26)

● Eclair #3318 (1:11:06)

● LND #10789 (1:13:05)

● Rust Bitcoin #6321 (1:14:09)

● LDK #4685 (1:16:14)

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Vasil Dimov to discuss Newsletter #409.

News

● Draft BIP for testnet5 (0:31)

Releases and release candidates

● LND 0.21.0-beta (17:25)

● Core Lightning 26.06.1 (20:19)

Notable code and documentation changes

● Bitcoin Core #35410 (21:28)

● Bitcoin Core #34779 (38:00)

● Bitcoin Core #32150 (41:36)

● LDK #4647 (45:14)

● BTCPay Server #7218 (51:34)

● BIPs #2186 (53:07)