add MinGasPrices check in interceptConfigs

server/start.go

@@ -122,11 +122,7 @@ which accepts a path for the resulting pprof file.
 				serverCtx.Logger.Info("starting ABCI without Tendermint")
 				return startStandAlone(serverCtx, appCreator)
 			}
-
-			if flagMinGasPricesStr, _ := cmd.Flags().GetString(FlagMinGasPrices); flagMinGasPricesStr == "" {
-				return fmt.Errorf("FlagMinGasPrices must not be empty")
-			}
-
+
 			serverCtx.Logger.Info("starting ABCI with Tendermint")
 
 			// amino is needed here for backwards compatibility of REST routes

server/util.go

@@ -224,23 +224,59 @@ func interceptConfigs(rootViper *viper.Viper) (*tmcfg.Config, error) {
 
 	conf.SetRoot(rootDir)
 
+	appCfgFilePath := filepath.Join(configPath, "app.toml")
+
+	appConf, err := config.ParseConfig(rootViper)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse %s: %w", appCfgFilePath, err)
+	}
+
+	if _, err := os.Stat(appCfgFilePath); os.IsNotExist(err) {
+		config.WriteConfigFile(appCfgFilePath, appConf)
+	}
+
+	// app.toml config file exist
+	rootViper.SetConfigType("toml")
+	rootViper.SetConfigName("app")
+	rootViper.AddConfigPath(configPath)
+
+	// reading config from app.toml 
+	if err := rootViper.ReadInConfig(); err != nil {
+		return nil, err
+	}
+	// unmarshalling to appConf
+	if err := rootViper.Unmarshal(appConf); err != nil {
+		return nil, err
+	}
+    // TODO play with prefixes envVars and flags
+	if appConf.BaseConfig.MinGasPrices == ""{
+		return nil, fmt.Errorf("MinGasPrices must not be empty")
+	}
+
+	if err := rootViper.MergeInConfig(); err != nil {
+		return nil, fmt.Errorf("failed to merge configuration: %w", err)
+	}
+
+	/*
 	appCfgFilePath := filepath.Join(configPath, "app.toml")
 	if _, err := os.Stat(appCfgFilePath); os.IsNotExist(err) {
 		appConf, err := config.ParseConfig(rootViper)
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse %s: %w", appCfgFilePath, err)
 		}
-
 		config.WriteConfigFile(appCfgFilePath, appConf)
 	}
 
+
 	rootViper.SetConfigType("toml")
 	rootViper.SetConfigName("app")
 	rootViper.AddConfigPath(configPath)
 
+
 	if err := rootViper.MergeInConfig(); err != nil {
 		return nil, fmt.Errorf("failed to merge configuration: %w", err)
 	}
+	*/
 
 	return conf, nil
 }