Add peer limits to CLI defaults (#1192)

params/config.go

@@ -304,9 +304,25 @@ func NewNodeConfigWithDefaults(dataDir, fleet string, networkID uint64) (*NodeCo
 	nodeConfig.WhisperConfig.Enabled = true
 	nodeConfig.WhisperConfig.EnableNTPSync = true
 
+	nodeConfig.updatePeerLimits()
+
 	return nodeConfig, nil
 }
 
+// updatePeerLimits will set default peer limits expectations based on enabled services.
+func (c *NodeConfig) updatePeerLimits() {
+	if c.NoDiscovery && !c.Rendezvous {
+		return
+	}
+	if c.WhisperConfig.Enabled {
+		c.RequireTopics[WhisperDiscv5Topic] = WhisperDiscv5Limits
+		// TODO(dshulyak) register mailserver limits when we will change how they are handled.
+	}
+	if c.LightEthConfig.Enabled {
+		c.RequireTopics[discv5.Topic(LesTopic(int(c.NetworkID)))] = LesDiscoveryLimits
+	}
+}
+
 // NewNodeConfig creates new node configuration object with bare-minimum defaults
 func NewNodeConfig(dataDir, fleet string, networkID uint64) (*NodeConfig, error) {
 	nodeConfig := &NodeConfig{