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

The recent discussion on the Bitcoin Development Mailing List highlighted an interesting facet of Bitcoin's functionality, focusing on its built-in script language known as Bitcoin Script. The dialogue brought forth a proposal to enhance this scripting language by adding several conditionally verified opcodes. These particular opcodes are deemed essential for the development and implementation of covenants within the Bitcoin framework. By introducing these opcodes, users would gain the ability to craft more sophisticated scripts or 'filters'.

A novel approach was suggested to test and understand the potential impact of these new opcodes on covenant creation. This involves executing the script as if it were input 0, offering a practical experiment to gauge the effectiveness and utility of the proposed opcode additions. Such an experiment could provide valuable insights into how best to expand Bitcoin Script’s capabilities specifically in the context of covenants, potentially leading to more robust and versatile scripting solutions within the Bitcoin ecosystem. This proposition underlines a proactive strategy to refine and improve Bitcoin's scripting language through community involvement and technical exploration.