+// NodeKey retrieves the currently configured private key of the node, checking
+// first any manually set key, falling back to the one found in the configured
+// data folder. If no key can be found, a new one is generated.
+func (cfg *Config) PrivateKey() *chainkd.XPrv {
+ if cfg.XPrv != nil {
+ return cfg.XPrv
+ }
+
+ filePath := rootify(cfg.PrivateKeyFile, cfg.BaseConfig.RootDir)
+ fildReader, err := os.Open(filePath)
+ if err != nil {
+ log.WithField("err", err).Panic("fail on open private key file")
+ }
+
+ defer fildReader.Close()
+ buf := make([]byte, 128)
+ if _, err = io.ReadFull(fildReader, buf); err != nil {
+ log.WithField("err", err).Panic("fail on read private key file")
+ }
+
+ var xprv chainkd.XPrv
+ if _, err := hex.Decode(xprv[:], buf); err != nil {
+ log.WithField("err", err).Panic("fail on decode private key")
+ }
+
+ cfg.XPrv = &xprv
+ xpub := cfg.XPrv.XPub()
+ cfg.XPub = &xpub
+ return cfg.XPrv
+}
+