op-node: Enable ban expiry gater.

Ensures that banned peers are unable to connect until the ban expires.

op-node/p2p/host.go

@@ -163,9 +163,7 @@ func (conf *Config) Host(log log.Logger, reporter metrics.Reporter, metrics Host
 	if err != nil {
 		return nil, fmt.Errorf("failed to open connection gater: %w", err)
 	}
-	// TODO(CLI-4015): apply connGtr enhancements
-	// connGtr = gating.AddBanExpiry(connGtr, ps, log, cl, reporter)
-	//connGtr = gating.AddScoring(connGtr, ps, 0)
+	connGtr = gating.AddBanExpiry(connGtr, ps, log, clock.SystemClock, metrics)
 	connGtr = gating.AddMetering(connGtr, metrics)
 
 	connMngr, err := DefaultConnManager(conf)

op-node/p2p/node.go

@@ -206,11 +206,7 @@ func (n *NodeP2P) Peers() []peer.ID {
 }
 
 func (n *NodeP2P) GetPeerScore(id peer.ID) (float64, error) {
-	scores, err := n.store.GetPeerScores(id)
-	if err != nil {
-		return 0, err
-	}
-	return scores.Gossip.Total, nil
+	return n.store.GetPeerScore(id)
 }
 
 func (n *NodeP2P) IsStatic(id peer.ID) bool {

op-node/p2p/store/iface.go

@@ -37,6 +37,9 @@ type ScoreDatastore interface {
 	// GetPeerScores returns the current scores for the specified peer
 	GetPeerScores(id peer.ID) (PeerScores, error)
 
+	// GetPeerScore returns the current combined score for the specified peer
+	GetPeerScore(id peer.ID) (float64, error)
+
 	// SetScore applies the given store diff to the specified peer
 	SetScore(id peer.ID, diff ScoreDiff) error
 }

op-node/p2p/store/scorebook.go

@@ -78,6 +78,14 @@ func (d *scoreBook) GetPeerScores(id peer.ID) (PeerScores, error) {
 	return record.PeerScores, nil
 }
 
+func (d *scoreBook) GetPeerScore(id peer.ID) (float64, error) {
+	scores, err := d.GetPeerScores(id)
+	if err != nil {
+		return 0, err
+	}
+	return scores.Gossip.Total, nil
+}
+
 func (d *scoreBook) SetScore(id peer.ID, diff ScoreDiff) error {
 	return d.book.SetRecord(id, diff)
 }

op-node/p2p/store/scorebook_test.go

@@ -188,6 +188,10 @@ func assertPeerScores(t *testing.T, store ExtendedPeerstore, id peer.ID, expecte
 	result, err := store.GetPeerScores(id)
 	require.NoError(t, err)
 	require.Equal(t, result, expected)
+
+	score, err := store.GetPeerScore(id)
+	require.NoError(t, err)
+	require.Equal(t, expected.Gossip.Total, score)
 }
 
 func createMemoryStore(t *testing.T) ExtendedPeerstore {