The Bitcoin Optech Newsletter's 2025 year in review is presented in a panel format, featuring discussions on Lightning Network advancements, soft fork proposals like transaction templates and consensus cleanup, script restoration, and quantum computing threats. The panel analyzes transaction templates, consensus cleanup, and opcode proposals, diving into the technical aspects of Taproot, v3, splicing, and channel jamming, as well as script restoration and signature aggregation schemes. The discussion also covers the challenges of probabilistic payments, quantum resistance, cluster mempool implementation, Erlay, and Stratum v2, and concludes with a discussion on the Bitcoin Kernel C API.
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