Bitcoin Optech Podcast

Author: Bitcoin Optech

Join Bitcoin Optech as we discuss Bitcoin and Lightning technology each week and review our newsletters. https://bitcoinops.org/
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Bitcoin Optech: Newsletter #390 Recap
Wednesday, 4 February, 2026

Mark “Murch” Erhardt and Gustavo Flores Echaiz are joined by Liam Eagen to discuss Newsletter #390.News● Argo: a garbled-circuits scheme with more efficient off-chain computation (0:48) ● LN-Symmetry update (26:05) Selected Q&A from Bitcoin Stack Exchange● What is stored in dbcache and with what priority? (34:21) ● Can one do a coinjoin in Shielded CSV? (24:02) ● In Bitcoin Core, how to use Tor for broadcasting new transactions only? (36:47) ● Brassard-Høyer-Tapp (BHT) algorithm and Bitcoin (BIP360) (38:31) ● Why does BitHash alternate sha256 and ripmed160? (39:24) Releases and release candidates● Libsecp256k1 0.7.1 (41:09) Notable code and documentation changes● Bitcoin Core #33822 (42:59) ● Bitcoin Core #34269 (44:50) ● Core Lightning #8850 (47:38) ● LDK #4349 (49:16) ● Rust Bitcoin #5470 (50:54) ● Rust Bitcoin #5443 (51:26) ● BDK #2037 (52:51) ● BIPs #2076 (55:49) ● BIPs #1500 (59:39)