Pragmatic definition of consensus for light clients

The recent discussion highlights a distinct approach to blockchain node management, focusing on the practicality and personal relevance of rule enforcement rather than adhering strictly to all protocols as traditional full nodes do. The argument presented advocates for a selective enforcement strategy where only rules that directly impact the user's financial security and those they are personally invested in are enforced. This method diverges from running a standard full node by prioritizing user-specific concerns such as the safety of their UTXOs and the economic viability of following particular forks.

Further emphasizing the practical aspects, the approach suggests that nodes need not enforce every rule if those rules do not relate to the user’s core interests or financial stakes. Instead, it proposes that nodes should operate with flexibility, adapting confirmations and responses based on the observed dominance and demand of certain forks — essentially allowing users to follow the path that holds the most economic promise and broad support, evidenced by Proof of Work (PoW). This stance is posited as more aligned with real-world user expectations, who may prefer not to support a fork that loses significant economic backing or relevance.

Moreover, this perspective introduces a nuanced view of consensus, which does not merely follow the majority for its own sake but combines an honest assessment of what benefits the user financially and security-wise. It challenges the conventional wisdom of full compliance with all soft or hard forks, proposing instead that users engage with the blockchain in a way that guards their investments and only involves them in rules and forks that have substantial implications for their assets. The dialogue around this topic underscores the need for a personalized node operation strategy that aligns more closely with individual needs and expectations rather than a one-size-fits-all model prevalent in typical full node setups.