Increase block cache size to 400k for faster wallet sync

- Increase default cache-size from 40,000 to 400,000 blocks
- Add Python gRPC protobuf bindings for testing

cmd/server/main.go

@@ -98,7 +98,7 @@ func main() {
 	flag.Uint64Var(&opts.logLevel, "log-level", uint64(logrus.InfoLevel), "log level (logrus 1-7)")
 	flag.StringVar(&opts.logPath, "log-file", "", "log file to write to")
 	flag.StringVar(&opts.confPath, "conf-file", "", "conf file to pull RPC creds from")
-	flag.IntVar(&opts.cacheSize, "cache-size", 40000, "number of blocks to hold in the cache")
+	flag.IntVar(&opts.cacheSize, "cache-size", 400000, "number of blocks to hold in the cache")
 
 	// creating --version as a requirement of help2man
 	if len(os.Args) > 1 && (os.Args[1] == "--version" || os.Args[1] == "-v") {