feat: Non-zero Default Fees

server/config/config.go

@@ -306,3 +306,7 @@ func GetConfig(v *viper.Viper) Config {
 		},
 	}
 }
+
+func (c Config) ValidateBasic() bool {
+	return c.BaseConfig.MinGasPrices != ""
+}

server/start.go

@@ -122,7 +122,7 @@ which accepts a path for the resulting pprof file.
 				serverCtx.Logger.Info("starting ABCI without Tendermint")
 				return startStandAlone(serverCtx, appCreator)
 			}
-
+			
 			serverCtx.Logger.Info("starting ABCI with Tendermint")
 
 			// amino is needed here for backwards compatibility of REST routes
@@ -274,6 +274,9 @@ func startInProcess(ctx *Context, clientCtx client.Context, appCreator types.App
 	ctx.Logger.Debug("initialization: tmNode started")
 
 	config := config.GetConfig(ctx.Viper)
+	if !config.ValidateBasic() {
+		return fmt.Errorf("MinGasPrices is not empty")
+	}
 
 	// Add the tx service to the gRPC router. We only need to register this
 	// service if API or gRPC is enabled, and avoid doing so in the general

server/util.go

@@ -230,7 +230,6 @@ func interceptConfigs(rootViper *viper.Viper) (*tmcfg.Config, error) {
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse %s: %w", appCfgFilePath, err)
 		}
-
 		config.WriteConfigFile(appCfgFilePath, appConf)
 	}
 
@@ -241,7 +240,7 @@ func interceptConfigs(rootViper *viper.Viper) (*tmcfg.Config, error) {
 	if err := rootViper.MergeInConfig(); err != nil {
 		return nil, fmt.Errorf("failed to merge configuration: %w", err)
 	}
-
+	
 	return conf, nil
 }