trace provider

op-challenger/cmd/main_test.go

@@ -428,6 +428,8 @@ func requiredArgs(traceType config.TraceType) map[string]string {
 		args["--cannon-server"] = cannonServer
 		args["--cannon-prestate"] = cannonPreState
 		args["--cannon-l2"] = cannonL2
+	case config.TraceTypeOutput:
+		// No additional args required
 	}
 	return args
 }

op-challenger/config/config.go

@@ -39,6 +39,7 @@ type TraceType string
 const (
 	TraceTypeAlphabet TraceType = "alphabet"
 	TraceTypeCannon   TraceType = "cannon"
+	TraceTypeOutput   TraceType = "output"
 
 	// Mainnet games
 	CannonFaultGameID = 0
@@ -47,7 +48,7 @@ const (
 	AlphabetFaultGameID = 255
 )
 
-var TraceTypes = []TraceType{TraceTypeAlphabet, TraceTypeCannon}
+var TraceTypes = []TraceType{TraceTypeAlphabet, TraceTypeCannon, TraceTypeOutput}
 
 // GameIdToString maps game IDs to their string representation.
 var GameIdToString = map[uint8]string{

op-challenger/flags/flags.go

@@ -210,6 +210,9 @@ func CheckRequired(ctx *cli.Context) error {
 		if !ctx.IsSet(AlphabetFlag.Name) {
 			return fmt.Errorf("flag %s is required", "alphabet")
 		}
+	case config.TraceTypeOutput:
+		// Mark the flag as unsupported for now so that we can implement downstream
+		return fmt.Errorf("flag %s is not supported", "output")
 	default:
 		return fmt.Errorf("invalid trace type. must be one of %v", config.TraceTypes)
 	}