Pragmatic definition of consensus for light clients

The discussion revolves around an innovative approach to Zero-Knowledge Proofs (ZKPs) in the context of blockchain technology, specifically focusing on a method that bypasses traditional consensus mechanisms such as script executions. The idea is to utilize ZKPs as a means to verify utreexo proofs directly linked to a blockchain tip, which also contains a specific number of Proof of Work (PoW) confirmations. This proposal seeks to streamline the process by counting only the transactions (UTXOs) entering and exiting each block, thereby updating the utreexo within the internal logic of the system.

The concept extends to creating recursive ZKPs, which would build upon previous proofs to validate new block additions continuously. This mechanism could potentially enable a network of lightweight clients that not only reduces the dependency on central nodes but also facilitates decentralization by allowing these clients to bootstrap third-party verifications with minimal trust requirements. The envisioned end result is not a competition between chains but rather between the ZKPs generated by different nodes. The most reliable and up-to-date ZKP, determined by its accumulated PoW, would be selected by network participants.

This approach could redefine how blockchain networks operate by significantly reducing the data required for verifying transactions and state changes, thus enhancing speed and efficiency while maintaining security through cryptographic proofs. Such a system would particularly benefit environments where bandwidth or storage capabilities are limited, yet a high level of trust and security is paramount.