autopilot+lnrpc: wire up SetNodeScores RPC to set scores of agent

autopilot/manager.go

@@ -287,3 +287,27 @@ func (m *Manager) QueryHeuristics(nodes []NodeID) (HeuristicScores, error) {
 	log.Debugf("Querying heuristics for %d nodes", len(n))
 	return m.pilot.queryHeuristics(n)
 }
+
+// SetNodeScores is used to set the scores of the given heuristic, if it is
+// active, and ScoreSettable.
+func (m *Manager) SetNodeScores(name string, scores map[NodeID]float64) error {
+	// It must be ScoreSettable to be available for external
+	// scores.
+	s, ok := m.cfg.PilotCfg.Heuristic.(ScoreSettable)
+	if !ok {
+		return fmt.Errorf("current heuristic doesn't support " +
+			"external scoring")
+	}
+
+	// Heuristic was found, set its node scores.
+	applied, err := s.SetNodeScores(name, scores)
+	if err != nil {
+		return err
+	}
+
+	if !applied {
+		return fmt.Errorf("heuristic with name %v not found", name)
+	}
+
+	return nil
+}