Bitcoin Optech #316: Time Warp Vulnerability in Testnet4, Onion Message DoS & More This issue describes a new time warp in testnet4, proposed mitigations for onion message denial-of-service concerns, a proposal to allow LN payers to optionally identify themselves, and a major change to Bitcoin Core’s build system that could affect downstream developers and integrators. https://www.nobsbitcoin.com/bitcoin-optech-316/