saved

daemons/node/indexer/handler.go

@@ -178,6 +178,43 @@ func (ix *IndexerService) initNodeHandler() {
 	ix.Host.SetStreamHandler(common.ProtocolPublish, ix.handleNodePublish)
 	ix.Host.SetStreamHandler(common.ProtocolGet, ix.handleNodeGet)
 	ix.Host.SetStreamHandler(common.ProtocolIndexerGetNatives, ix.handleGetNatives)
+	ix.Host.SetStreamHandler(common.ProtocolIndexerConsensus, ix.handleIndexerConsensus)
+}
+
+// handleIndexerConsensus implements Phase 2 liveness voting (ProtocolIndexerConsensus).
+// The caller sends a list of candidate multiaddrs; this indexer replies with the
+// subset it considers currently alive (recent heartbeat in StreamRecords).
+func (ix *IndexerService) handleIndexerConsensus(stream network.Stream) {
+	defer stream.Reset()
+
+	var req common.IndexerConsensusRequest
+	if err := json.NewDecoder(stream).Decode(&req); err != nil {
+		return
+	}
+
+	ix.StreamMU.RLock()
+	streams := ix.StreamRecords[common.ProtocolHeartbeat]
+	ix.StreamMU.RUnlock()
+
+	alive := make([]string, 0, len(req.Candidates))
+	for _, addr := range req.Candidates {
+		ad, err := peer.AddrInfoFromString(addr)
+		if err != nil {
+			continue
+		}
+		ix.StreamMU.RLock()
+		rec, ok := streams[ad.ID]
+		ix.StreamMU.RUnlock()
+		if !ok || rec.HeartbeatStream == nil || rec.HeartbeatStream.UptimeTracker == nil {
+			continue
+		}
+		// D: consider alive only if recent heartbeat AND score above minimum quality bar.
+		if time.Since(rec.HeartbeatStream.UptimeTracker.LastSeen) <= 2*common.RecommendedHeartbeatInterval &&
+			rec.LastScore >= 30.0 {
+			alive = append(alive, addr)
+		}
+	}
+	json.NewEncoder(stream).Encode(common.IndexerConsensusResponse{Alive: alive})
 }
 
 func (ix *IndexerService) handleNodePublish(s network.Stream) {