feat: Cannon

.gitignore

@@ -2,6 +2,7 @@ sentry.yaml
 server.yaml
 discovery.yaml
 mimicry.yaml
+cannon.yaml
 dist
 GeoLite2-ASN.mmdb
 GeoLite2-City.mmdb

cmd/cannon.go

@@ -0,0 +1,86 @@
+//nolint:dupl // disable duplicate code warning for cmds
+package cmd
+
+import (
+	"os"
+
+	"github.com/creasty/defaults"
+	"github.com/ethpandaops/xatu/pkg/cannon"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	yaml "gopkg.in/yaml.v3"
+)
+
+var (
+	cannonCfgFile string
+)
+
+// cannonCmd represents the cannon command
+var cannonCmd = &cobra.Command{
+	Use:   "cannon",
+	Short: "Runs Xatu in cannon mode.",
+	Long: `Runs Xatu in cannon mode, which means it will connect to xatu
+	server and process jobs like deriving events from beacon blocks..`,
+	Run: func(cmd *cobra.Command, args []string) {
+		initCommon()
+
+		log.WithField("location", cannonCfgFile).Info("Loading config")
+
+		config, err := loadcannonConfigFromFile(cannonCfgFile)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		log.Info("Config loaded")
+
+		logLevel, err := logrus.ParseLevel(config.LoggingLevel)
+		if err != nil {
+			log.WithField("logLevel", config.LoggingLevel).Fatal("invalid logging level")
+		}
+
+		log.SetLevel(logLevel)
+
+		cannon, err := cannon.New(cmd.Context(), log, config)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		if err := cannon.Start(cmd.Context()); err != nil {
+			log.Fatal(err)
+		}
+
+		log.Info("Xatu cannon exited - cya!")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(cannonCmd)
+
+	cannonCmd.Flags().StringVar(&cannonCfgFile, "config", "cannon.yaml", "config file (default is cannon.yaml)")
+}
+
+func loadcannonConfigFromFile(file string) (*cannon.Config, error) {
+	if file == "" {
+		file = "cannon.yaml"
+	}
+
+	config := &cannon.Config{}
+
+	if err := defaults.Set(config); err != nil {
+		return nil, err
+	}
+
+	yamlFile, err := os.ReadFile(file)
+
+	if err != nil {
+		return nil, err
+	}
+
+	type plain cannon.Config
+
+	if err := yaml.Unmarshal(yamlFile, (*plain)(config)); err != nil {
+		return nil, err
+	}
+
+	return config, nil
+}