RPC nodes in Web3 are a critical vulnerability — they can lag, desync, or serve manipulated state data, causing AI agents to execute transactions on false blockchain realities. Layer 4 of the Lirix architecture addresses this with a Byzantine Fault Tolerance-inspired Truth Consensus Engine. It concurrently polls all configured RPC nodes, calculates block height spread, and throws an RPCUnavailableException if divergence exceeds 2 blocks (fail-closed principle). A deterministic Breathing Circuit Breaker complements this by tracking per-node failures, amputating nodes after 3 strikes, enforcing a hard cooldown, and allowing resurrection after a successful request. Python code for the cluster health verification logic is provided.
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