Add heartbeat endpoint for aggregator #550
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| // CalculateAdaptiveScore computes the adaptive score based on the provided block height and all block heights. | ||
| // The score reflects how far behind the provided block height is compared to others using Median Absolute Deviation (MAD). |
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Implements a heartbeat service that aggregates blockchain synchronization metrics across multiple verifier nodes, enabling validators to identify lagging nodes and assess their health.
Heartbeat Request contains
SendTimestamp: Unix timestampChainDetails.BlockHeightsByChain:map<chainSelector, blockHeight>Response contains
ChainBenchmarks: Per-chain aggregated metricsBlockHeight: Network maximum across all callersScore: Adaptive MAD-based score (1.0 = healthy, >1.0 = lagging)Metrics Added:
verifier_heartbeat_timestamp(gauge): Last heartbeat timestamp per verifierverifier_heartbeats_total(counter): Total heartbeats received per verifierverifier_heartbeat_chain_heads(gauge): Block height per verifier per chainverifier_heartbeat_score(gauge): Adaptive lag score per verifier per chainAll metrics include
caller_idandchain_selectorlabels for per-verifier, per-chain visibility.