Add node cache info

main.go

@@ -48,6 +48,7 @@ type configParams struct {
 	StatFilename       string   `short:"s" long:"stat" description:"save successful rebalance information to the specified CSV file" json:"stat" toml:"stat"`
 	NodeCacheFilename  string   `long:"node-cache-filename" description:"save and load other nodes information to this file, improves cold start performance"  json:"node_cache_filename" toml:"node_cache_filename"`
 	NodeCacheLifetime  int      `long:"node-cache-lifetime" description:"nodes with last update older than this time (in minutes) will be removed from cache after loading it" json:"node_cache_lifetime" toml:"node_cache_lifetime" default:"1440"`
+	NodeCacheInfo      bool     `long:"node-cache-info" description:"show red and cyan 'x' characters in routes to indicate node cache misses and hits respectively" json:"node_cache_info" toml:"node_cache_info"`
 }
 
 var params, cfgParams configParams

routes.go

@@ -138,6 +138,14 @@ func (r *regolancer) printRoute(ctx context.Context, route *lnrpc.Route) {
 	fmt.Printf("%s %s sat | %s ppm\n", faintWhiteColor("Total fee:"),
 		formatFee(route.TotalFeesMsat), formatFeePPM(route.TotalAmtMsat, route.TotalFeesMsat))
 	for i, hop := range route.Hops {
+		cached := ""
+		if params.NodeCacheInfo {
+			cached = errColor("x")
+			if _, ok := r.nodeCache[hop.PubKey]; ok {
+				cached = cyanColor("x")
+			}
+			cached += "|"
+		}
 		nodeInfo, err := r.getNodeInfo(ctx, hop.PubKey)
 		if err != nil {
 			errs = errs + err.Error() + "\n"
@@ -147,7 +155,7 @@ func (r *regolancer) printRoute(ctx context.Context, route *lnrpc.Route) {
 		if i > 0 {
 			fee = hiWhiteColorF("%-6d", route.Hops[i-1].FeeMsat)
 		}
-		fmt.Printf("%s %s [%s|%sch|%ssat|%s]\n", faintWhiteColor(hop.ChanId), fee, cyanColor(nodeInfo.Node.Alias),
+		fmt.Printf("%s %s [%s%s|%sch|%ssat|%s]\n", faintWhiteColor(hop.ChanId), fee, cached, cyanColor(nodeInfo.Node.Alias),
 			infoColor(nodeInfo.NumChannels), formatAmt(nodeInfo.TotalCapacity), infoColor(nodeInfo.Node.PubKey))
 	}
 	if errs != "" {