op-node: Add pectra blob schedule fix kill-switch (#14922)

* op-node: Add pectra blob schedule fix kill-switch

* move ignore flag into node config

Author: sebastianst

Diff for: op-node/flags/flags.go

@@ -419,6 +419,16 @@ var (
 		Destination: new(string),
 		Category:    InteropCategory,
 	}
+
+	IgnoreMissingPectraBlobSchedule = &cli.BoolFlag{
+		Name: "ignore-missing-pectra-blob-schedule",
+		Usage: "Ignore missing pectra blob schedule fix for Sepolia and Holesky chains. Only set if you know what you are doing!" +
+			"Ask your chain's operator for the correct Pectra blob schedule activation time and set it via the rollup.json config" +
+			"or use the --override.pectrablobschedule flag.",
+		EnvVars:  prefixEnvVars("IGNORE_MISSING_PECTRA_BLOB_SCHEDULE"),
+		Category: RollupCategory,
+		Hidden:   true,
+	}
 )
 
 var requiredFlags = []cli.Flag{
@@ -471,6 +481,7 @@ var optionalFlags = []cli.Flag{
 	InteropRPCAddr,
 	InteropRPCPort,
 	InteropJWTSecret,
+	IgnoreMissingPectraBlobSchedule,
 }
 
 var DeprecatedFlags = []cli.Flag{

Diff for: op-node/node/config.go

@@ -76,6 +76,8 @@ type Config struct {
 
 	// AltDA config
 	AltDA altda.CLIConfig
+
+	IgnoreMissingPectraBlobSchedule bool
 }
 
 // ConductorRPCFunc retrieves the endpoint. The RPC may not immediately be available.
@@ -127,6 +129,8 @@ func (cfg *Config) LoadPersisted(log log.Logger) error {
 	return nil
 }
 
+var ErrMissingPectraBlobSchedule = errors.New("probably missing Pectra blob schedule")
+
 // Check verifies that the given configuration makes sense
 func (cfg *Config) Check() error {
 	if err := cfg.L1.Check(); err != nil {
@@ -154,6 +158,13 @@ func (cfg *Config) Check() error {
 	if err := cfg.Rollup.Check(); err != nil {
 		return fmt.Errorf("rollup config error: %w", err)
 	}
+	if !cfg.IgnoreMissingPectraBlobSchedule && cfg.Rollup.ProbablyMissingPectraBlobSchedule() {
+		log.Error("Your rollup config seems to be missing the Pectra blob schedule fix. " +
+			"Reach out to your chain operator for the correct Pectra blob schedule configuration. " +
+			"If you know what you are doing, you can disable this error by setting the " +
+			"'--ignore-missing-pectra-blob-schedule' flag or 'IGNORE_MISSING_PECTRA_BLOB_SCHEDULE' env var.")
+		return ErrMissingPectraBlobSchedule
+	}
 	if err := cfg.Metrics.Check(); err != nil {
 		return fmt.Errorf("metrics config error: %w", err)
 	}

Diff for: op-node/rollup/types.go

@@ -358,6 +358,32 @@ func (cfg *Config) HasOptimismWithdrawalsRoot(timestamp uint64) bool {
 	return cfg.IsIsthmus(timestamp)
 }
 
+// ProbablyMissingPectraBlobSchedule returns whether the chain is likely missing the Pectra blob
+// schedule fix.
+// A chain probably needs the Pectra blob schedule fix if:
+// - its L1 in Holesky or Sepolia, and
+// - its genesis is before the L1's Prague activation.
+func (cfg *Config) ProbablyMissingPectraBlobSchedule() bool {
+	if cfg.PectraBlobScheduleTime != nil {
+		return false
+	}
+
+	var pragueTime uint64
+	if cfg.L1ChainID.Cmp(params.HoleskyChainConfig.ChainID) == 0 {
+		pragueTime = *params.HoleskyChainConfig.PragueTime
+	} else if cfg.L1ChainID.Cmp(params.SepoliaChainConfig.ChainID) == 0 {
+		pragueTime = *params.SepoliaChainConfig.PragueTime
+	} else {
+		// Only Holesky and Sepolia chains may have run into the
+		// Pectra blob schedule bug.
+		return false
+	}
+
+	// Only chains whose genesis was before the L1's prague activation need
+	// the Pectra blob schedule fix.
+	return pragueTime >= cfg.Genesis.L2Time
+}
+
 // validateAltDAConfig checks the two approaches to configuring alt-da mode.
 // If the legacy values are set, they are copied to the new location. If both are set, they are check for consistency.
 func validateAltDAConfig(cfg *Config) error {

Diff for: op-node/rollup/types_test.go

@@ -13,6 +13,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/params"
 
 	"github.com/ethereum-optimism/optimism/op-service/eth"
 )
@@ -823,3 +824,66 @@ func TestConfigImplementsBlockType(t *testing.T) {
 		})
 	}
 }
+
+func TestConfig_ProbablyMissingPectraBlobSchedule(t *testing.T) {
+	hol, sep := params.HoleskyChainConfig, params.SepoliaChainConfig
+
+	for _, tt := range []struct {
+		name                   string
+		pectraBlobScheduleTime *uint64
+		l2genesisTime          uint64
+		l1chainID              *big.Int
+		expMissing             bool
+	}{
+		{
+			name:                   "sepolia-ok",
+			pectraBlobScheduleTime: u64ptr(1742486400), // sepolia superchain
+			l2genesisTime:          1691802540,         // op-sepolia
+			l1chainID:              sep.ChainID,
+		},
+		{
+			name:                   "holesky-ok",
+			pectraBlobScheduleTime: u64ptr(1742486400), // sepolia superchain
+			l2genesisTime:          1691802540,         // op-sepolia
+			l1chainID:              hol.ChainID,
+		},
+		{
+			name:          "sepolia-missing",
+			l2genesisTime: 1691802540, // op-sepolia
+			l1chainID:     sep.ChainID,
+			expMissing:    true,
+		},
+		{
+			name:          "holesky-missing",
+			l2genesisTime: 1691802540, // op-sepolia
+			l1chainID:     hol.ChainID,
+			expMissing:    true,
+		},
+		{
+			name:          "sepolia-young-genesis",
+			l2genesisTime: *sep.PragueTime + 1,
+			l1chainID:     sep.ChainID,
+		},
+		{
+			name:          "holesky-young-genesis",
+			l2genesisTime: *hol.PragueTime + 1,
+			l1chainID:     hol.ChainID,
+		},
+		{
+			name:          "other-missing-ok",
+			l2genesisTime: 1691802540,
+			l1chainID:     big.NewInt(1),
+		},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			cfg := &Config{
+				Genesis: Genesis{
+					L2Time: tt.l2genesisTime,
+				},
+				PectraBlobScheduleTime: tt.pectraBlobScheduleTime,
+				L1ChainID:              tt.l1chainID,
+			}
+			assert.Equal(t, tt.expMissing, cfg.ProbablyMissingPectraBlobSchedule())
+		})
+	}
+}

Diff for: op-node/service.go

@@ -115,6 +115,8 @@ func NewConfig(ctx *cli.Context, log log.Logger) (*node.Config, error) {
 		ConductorRpcTimeout: ctx.Duration(flags.ConductorRpcTimeoutFlag.Name),
 
 		AltDA: altda.ReadCLIConfig(ctx),
+
+		IgnoreMissingPectraBlobSchedule: ctx.Bool(flags.IgnoreMissingPectraBlobSchedule.Name),
 	}
 
 	if err := cfg.LoadPersisted(log); err != nil {