return error instead of panic

rpc/backend/backend.go

@@ -157,7 +157,10 @@ func NewBackend(
 		panic(err)
 	}
 
-	appConf := config.GetConfig(ctx.Viper)
+	appConf, err := config.GetConfig(ctx.Viper)
+	if err != nil {
+		panic(err)
+	}
 
 	algos, _ := clientCtx.Keyring.SupportedAlgorithms()
 	if !algos.Contains(hd.EthSecp256k1) {

rpc/backend/node_info.go

@@ -236,7 +236,11 @@ func (b *Backend) NewMnemonic(uid string, language keyring.Language, hdPath, bip
 // NOTE: this function accepts only integers to have the same interface than go-eth
 // to use float values, the gas prices must be configured using the configuration file
 func (b *Backend) SetGasPrice(gasPrice hexutil.Big) bool {
-	appConf := config.GetConfig(b.clientCtx.Viper)
+	appConf, err := config.GetConfig(b.clientCtx.Viper)
+	if err != nil {
+		b.logger.Debug("could not get the server config", "error", err.Error())
+		return false
+	}
 
 	var unit string
 	minGasPrices := appConf.GetMinGasPrices()

server/config/config.go

@@ -291,10 +291,10 @@ func (c TLSConfig) Validate() error {
 }
 
 // GetConfig returns a fully parsed Config object.
-func GetConfig(v *viper.Viper) Config {
+func GetConfig(v *viper.Viper) (Config, error) {
 	cfg, err := config.GetConfig(v)
 	if err != nil {
-		panic(err)
+		return Config{}, err
 	}
 
 	return Config{
@@ -324,7 +324,7 @@ func GetConfig(v *viper.Viper) Config {
 			CertificatePath: v.GetString("tls.certificate-path"),
 			KeyPath:         v.GetString("tls.key-path"),
 		},
-	}
+	}, nil
 }
 
 // ParseConfig retrieves the default environment configuration for the

server/start.go

@@ -281,7 +281,10 @@ func startInProcess(ctx *server.Context, clientCtx client.Context, appCreator ty
 		return err
 	}
 
-	config := config.GetConfig(ctx.Viper)
+	config, err := config.GetConfig(ctx.Viper)
+	if err != nil {
+		return err
+	}
 
 	if err := config.ValidateBasic(); err != nil {
 		if strings.Contains(err.Error(), "set min gas price in app.toml or flag or env variable") {