Abstract: This proposal introduces a policy-level optimization to the Bitcoin Core mempool validation layer to mitigate potential Denial-of-Service (DoS) vectors stemming from high-frequency, low-weight transaction submissions. By enforcing strict minimum transaction weight rules relative to input structures during the initial policy validation phase, nodes can filter out non-standard, economically unviable transaction paths before allocating critical CPU validation time or propagating them further across the peer-to-peer network. Motivation: The Bitcoin mempool framework relies on policy checks to prevent resource exhaustion attacks. While minimum relay fees filter out standard spam, specific anomalies involving transactions with abnormally low weights relative to their execution overhead can introduce unnecessary validation strain. Implementing an early-stage weight filter within the standard transaction validation sequence provides an explicit, lightweight layer of def...
