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package main
import (
"fmt"
"os"
challenger "github.com/ethereum-optimism/optimism/op-challenger/challenger"
config "github.com/ethereum-optimism/optimism/op-challenger/config"
flags "github.com/ethereum-optimism/optimism/op-challenger/flags"
version "github.com/ethereum-optimism/optimism/op-challenger/version"
log "github.com/ethereum/go-ethereum/log"
cli "github.com/urfave/cli"
oplog "github.com/ethereum-optimism/optimism/op-service/log"
)
var (
GitCommit = ""
GitDate = ""
)
// VersionWithMeta holds the textual version string including the metadata.
var VersionWithMeta = func() string {
v := version.Version
if GitCommit != "" {
v += "-" + GitCommit[:8]
}
if GitDate != "" {
v += "-" + GitDate
}
if version.Meta != "" {
v += "-" + version.Meta
}
return v
}()
func main() {
args := os.Args
if err := run(args, challenger.Main); err != nil {
log.Crit("Application failed", "err", err)
}
}
type ConfigAction func(log log.Logger, version string, config *config.Config) error
// run parses the supplied args to create a config.Config instance, sets up logging
// then calls the supplied ConfigAction.
// This allows testing the translation from CLI arguments to Config
func run(args []string, action ConfigAction) error {
// Set up logger with a default INFO level in case we fail to parse flags,
// otherwise the final critical log won't show what the parsing error was.
oplog.SetupDefaults()
app := cli.NewApp()
app.Version = VersionWithMeta
app.Flags = flags.Flags
app.Name = "op-challenger"
app.Usage = "Challenge Invalid L2OutputOracle Outputs"
app.Description = "A modular op-stack challenge agent for dispute games written in golang."
app.Action = func(ctx *cli.Context) error {
logger, err := setupLogging(ctx)
if err != nil {
return err
}
logger.Info("Starting challenger", "version", VersionWithMeta)
cfg, err := config.NewConfigFromCLI(ctx)
if err != nil {
return err
}
return action(logger, VersionWithMeta, cfg)
}
return app.Run(args)
}
func setupLogging(ctx *cli.Context) (log.Logger, error) {
logCfg := oplog.ReadCLIConfig(ctx)
if err := logCfg.Check(); err != nil {
return nil, fmt.Errorf("log config error: %w", err)
}
logger := oplog.NewLogger(logCfg)
return logger, nil
}