openethereum-node-status/cmd/node-status/main.go

package main

import (
	"fmt"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/knadh/koanf"
	"github.com/knadh/koanf/parsers/toml"
	"github.com/knadh/koanf/providers/env"
	"github.com/knadh/koanf/providers/file"
	"github.com/rs/zerolog"
	"github.com/rs/zerolog/log"

	"git.grassecon.org/grassrootseconomics/openethereum-node-status/internal/server"
	"git.grassecon.org/grassrootseconomics/openethereum-node-status/pkg/rpc"
)

const (
	confEnvOverridePrefix = ""
)

var (
	conf = koanf.New(".")
)

func main() {
	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
	zerolog.SetGlobalLevel(zerolog.InfoLevel)
	ginMode := gin.ReleaseMode

	// confini style config loading/overriding
	confFile := file.Provider("config/config.toml")

	if err := conf.Load(confFile, toml.Parser()); err != nil {
		log.Fatal().
			Err(err).
			Str("service", "koanf").
			Msg("cannot load config file")
	}

	if err := conf.Load(env.Provider(confEnvOverridePrefix, ".", func(s string) string {
		return strings.ReplaceAll(strings.ToLower(
			strings.TrimPrefix(s, confEnvOverridePrefix)), "_", ".")
	}), nil); err != nil {
		log.Fatal().
			Err(err).
			Str("module", "main").
			Msg("cannot load env variables")
	}

	if conf.Bool("debug.enabled") {
		zerolog.SetGlobalLevel(zerolog.DebugLevel)
		ginMode = gin.DebugMode
		log.Debug().Str("module", "main").Msg("debug mode enabled")
	}

	server.RpcClient = rpc.NewRpcClient(conf.String("rpc.endpoint"))

	if err := server.Start(fmt.Sprintf(":%s", conf.String("server.port")), ginMode); err != nil {
		log.Fatal().
			Err(err).
			Str("module", "main").
			Msg("could not start server")
	}
}