Bitcoin Optech newsletter #393 is here: - summarizes a discussion about recent OP_RETURN usage - describes a protocol to enforce covenant-like spending conditions without consensus changes - summarizes changes to services/client software including Ark software, silent payment and submarine swap support, and more - Optech Newsletter #393 Podcast https://bitcoinops.org/en/newsletters/2026/02/20/ Anthony Towns posted to Delving about the recent OP_RETURN statistics since the release of Bitcoin Core v30.0 on October 10... https://bitcoinops.org/en/newsletters/2026/02/20/#recent-… Misha Komarov posted to Delving Bitcoin about Bitcoin PIPEs, a protocol that allows enforcement of spending conditions without the need for consensus changes or optimistic challenge mechanisms... https://bitcoinops.org/en/newsletters/2026/02/20/#bitcoin… Changes to services and client software: - Second releases hArk-based Ark software - Amboss announces RailsX - Nunchuk adds silent payment support - Electrum adds submarine swap features - Sigbash v2 announced https://bitcoinops.org/en/newsletters/2026/02/20/#changes… Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 17:30 UTC.