op-node: Expose method to load rollup config without a CLI context. (#9554)

op-bootnode/bootnode/entrypoint.go

@@ -50,7 +50,7 @@ func Main(cliCtx *cli.Context) error {
 	m := metrics.NewMetrics("default")
 	ctx := context.Background()
 
-	config, err := opnode.NewRollupConfig(logger, cliCtx)
+	config, err := opnode.NewRollupConfigFromCLI(logger, cliCtx)
 	if err != nil {
 		return err
 	}

op-conductor/conductor/config.go

@@ -101,7 +101,7 @@ func NewConfig(ctx *cli.Context, log log.Logger) (*Config, error) {
 		return nil, errors.Wrap(err, "missing required flags")
 	}
 
-	rollupCfg, err := opnode.NewRollupConfig(log, ctx)
+	rollupCfg, err := opnode.NewRollupConfigFromCLI(log, ctx)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to load rollup config")
 	}

op-node/cmd/networks/cmd.go

@@ -29,7 +29,7 @@ var Subcommands = []*cli.Command{
 				return errors.New("must specify a network name")
 			}
 
-			rCfg, err := opnode.NewRollupConfig(logger, ctx)
+			rCfg, err := opnode.NewRollupConfigFromCLI(logger, ctx)
 			if err != nil {
 				return err
 			}

op-node/service.go

@@ -33,7 +33,7 @@ func NewConfig(ctx *cli.Context, log log.Logger) (*node.Config, error) {
 		return nil, err
 	}
 
-	rollupConfig, err := NewRollupConfig(log, ctx)
+	rollupConfig, err := NewRollupConfigFromCLI(log, ctx)
 	if err != nil {
 		return nil, err
 	}
@@ -196,12 +196,21 @@ func NewDriverConfig(ctx *cli.Context) *driver.Config {
 	}
 }
 
-func NewRollupConfig(log log.Logger, ctx *cli.Context) (*rollup.Config, error) {
+func NewRollupConfigFromCLI(log log.Logger, ctx *cli.Context) (*rollup.Config, error) {
 	network := ctx.String(opflags.NetworkFlagName)
 	rollupConfigPath := ctx.String(opflags.RollupConfigFlagName)
 	if ctx.Bool(flags.BetaExtraNetworks.Name) {
 		log.Warn("The beta.extra-networks flag is deprecated and can be omitted safely.")
 	}
+	rollupConfig, err := NewRollupConfig(log, network, rollupConfigPath)
+	if err != nil {
+		return nil, err
+	}
+	applyOverrides(ctx, rollupConfig)
+	return rollupConfig, nil
+}
+
+func NewRollupConfig(log log.Logger, network string, rollupConfigPath string) (*rollup.Config, error) {
 	if network != "" {
 		if rollupConfigPath != "" {
 			log.Error(`Cannot configure network and rollup-config at the same time.
@@ -213,7 +222,6 @@ Conflicting configuration is deprecated, and will stop the op-node from starting
 		if err != nil {
 			return nil, err
 		}
-		applyOverrides(ctx, rollupConfig)
 		return rollupConfig, nil
 	}
 
@@ -227,7 +235,6 @@ Conflicting configuration is deprecated, and will stop the op-node from starting
 	if err := json.NewDecoder(file).Decode(&rollupConfig); err != nil {
 		return nil, fmt.Errorf("failed to decode rollup config: %w", err)
 	}
-	applyOverrides(ctx, &rollupConfig)
 	return &rollupConfig, nil
 }
 

op-program/host/config/config.go

@@ -46,7 +46,6 @@ type Config struct {
 	L1RPCKind   sources.RPCProviderKind
 
 	// L2Head is the l2 block hash contained in the L2 Output referenced by the L2OutputRoot
-	// TODO(inphi): This can be made optional with hardcoded rollup configs and output oracle addresses by searching the oracle for the l2 output root
 	L2Head common.Hash
 	// L2OutputRoot is the agreed L2 output root to start derivation from
 	L2OutputRoot common.Hash
@@ -138,7 +137,7 @@ func NewConfigFromCLI(log log.Logger, ctx *cli.Context) (*Config, error) {
 	if err := flags.CheckRequired(ctx); err != nil {
 		return nil, err
 	}
-	rollupCfg, err := opnode.NewRollupConfig(log, ctx)
+	rollupCfg, err := opnode.NewRollupConfigFromCLI(log, ctx)
 	if err != nil {
 		return nil, err
 	}