Regarding Sentry Nodes, many people only see them as "mining machines," but they don't understand how they reconstruct trust. In traditional centralized servers, game companies are like gods; they can say your equipment is gone, and it's gone. In the XAI network, tens of thousands of Sentry Nodes form a "decentralized audit bureau." Using challenge protocols from game theory, as long as one node worldwide detects abnormal transaction data and issues a challenge, it can trigger on-chain arbitration. This "1/N" security model is highly cost-effective: it doesn't require all nodes to perform redundant calculations (which would be a huge waste), yet it achieves the security level of full network consensus. This is what Web3 infrastructure should look like: efficient, low-cost, and absolutely honest.