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Bitcoin Optech: Newsletter #397 Recap
Tuesday, 24 March, 2026

Mark “Murch” Erhardt, Gustavo Flores Echaiz, and Mike Schmidt are joined by Matt Corallo, Gregory Sanders, and Sebastian van Staa to discuss ⁠Newsletter #397⁠.Changes to services and client software● Cake Wallet adds Lightning support (1:06:09) ● Sparrow 2.4.0 and 2.4.2 released (1:13:15) ● Blockstream Jade adds Lightning via Liquid (1:15:33) ● Lightning Labs releases agent tools (14:49) ● Tether launches MiningOS (1:17:38) ● FIBRE network relaunched (1:35) ● TUI for Bitcoin Core released (1:19:34) Releases and release candidates● Bitcoin Core 31.0rc1 (28:24) ● BTCPay Server 2.3.6 (1:20:55) Notable code and documentation changes● Bitcoin Core #31560 (1:21:55) ● Bitcoin Core #31774 (1:23:35) ● Core Lightning #8817 (1:25:12) ● Eclair #3265 (1:27:41) ● LDK #4427 (22:36) ● LDK #4484 (23:45) ● BIPs #1974 (49:52)

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