[BIP Proposal] Mempool Validation and Relay Policies via User-Defined Scripts

JavaScript's current implementations, particularly V8, are highlighted for their frequent security vulnerabilities despite being among the best-maintained. This raises concerns about the effectiveness of JavaScript in safe sandboxing environments. The discussion suggests that for many users, especially those not versed in advanced computing concepts, engaging with filesystems presents a challenge. These users, often running nodes, might benefit from interfaces and systems designed with simplicity and accessibility in mind.

The correspondence proposes the development of a domain-specific language (DSL) as a solution to these challenges. This new DSL would aim to mitigate potential abuse, such as censorship, while being user-friendly and allowing for optimizations that could be native or even dynamically adapted based on runtime profiling. This approach suggests a significant leap in design complexity but is seen as a necessary evolution to address the shortcomings of current implementations effectively.

Despite recognizing the potential benefits of a DSL, there is an acknowledgment of the practicality and immediate usefulness of the existing concept. It is recommended to fully develop and test the current proof-of-concept (POC) in real-world scenarios before considering a Bitcoin Improvement Proposal (BIP) for the interface. This step-by-step approach underscores the importance of validating concepts through practical application before embarking on more ambitious developments.