Bitcoin Optech Newsletter #412

The Bitcoin Optech Newsletter #412 discusses technical proposals for post-quantum (PQ) security, including STARK aggregation for SPHINCS signatures, hybrid signature schemes (BoP-2), and lattice-based signatures. It also covers P2MR optimizations, a proposal to prohibit specific merkle internal node preimages, and mechanisms to disable elliptic curve (EC) spending paths in the future. Additionally, it lists release candidates for Bitcoin Core (31.1, 30.3, 29.4) and updates for LND, Core Lightning, and LDK.