op-program: Pass a ChainConfig to the Config struct rather than a file path to load from

op-program/host/cmd/main_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/ethereum-optimism/optimism/op-node/sources"
 	"github.com/ethereum-optimism/optimism/op-program/host/config"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/stretchr/testify/require"
 )
@@ -17,16 +18,19 @@ import (
 var l1HeadValue = common.HexToHash("0x111111").Hex()
 var l2HeadValue = common.HexToHash("0x222222").Hex()
 var l2ClaimValue = common.HexToHash("0x333333").Hex()
+var l2Genesis = core.DefaultGoerliGenesisBlock()
+var l2GenesisConfig = l2Genesis.Config
 
 func TestLogLevel(t *testing.T) {
+	t.Parallel()
 	t.Run("RejectInvalid", func(t *testing.T) {
-		verifyArgsInvalid(t, "unknown level: foo", addRequiredArgs("--log.level=foo"))
+		verifyArgsInvalid(t, "unknown level: foo", addRequiredArgs(t, "--log.level=foo"))
 	})
 
 	for _, lvl := range []string{"trace", "debug", "info", "error", "crit"} {
 		lvl := lvl
 		t.Run("AcceptValid_"+lvl, func(t *testing.T) {
-			logger, _, err := runWithArgs(addRequiredArgs("--log.level", lvl))
+			logger, _, err := runWithArgs(addRequiredArgs(t, "--log.level", lvl))
 			require.NoError(t, err)
 			require.NotNil(t, logger)
 		})
@@ -34,10 +38,11 @@ func TestLogLevel(t *testing.T) {
 }
 
 func TestDefaultCLIOptionsMatchDefaultConfig(t *testing.T) {
-	cfg := configForArgs(t, addRequiredArgs())
+	t.Parallel()
+	cfg := configForArgs(t, addRequiredArgs(t))
 	defaultCfg := config.NewConfig(
 		&chaincfg.Goerli,
-		"genesis.json",
+		l2GenesisConfig,
 		common.HexToHash(l1HeadValue),
 		common.HexToHash(l2HeadValue),
 		common.HexToHash(l2ClaimValue))
@@ -45,16 +50,17 @@ func TestDefaultCLIOptionsMatchDefaultConfig(t *testing.T) {
 }
 
 func TestNetwork(t *testing.T) {
+	t.Parallel()
 	t.Run("Unknown", func(t *testing.T) {
-		verifyArgsInvalid(t, "invalid network bar", replaceRequiredArg("--network", "bar"))
+		verifyArgsInvalid(t, "invalid network bar", replaceRequiredArg(t, "--network", "bar"))
 	})
 
 	t.Run("Required", func(t *testing.T) {
-		verifyArgsInvalid(t, "flag rollup.config or network is required", addRequiredArgsExcept("--network"))
+		verifyArgsInvalid(t, "flag rollup.config or network is required", addRequiredArgsExcept(t, "--network"))
 	})
 
 	t.Run("DisallowNetworkAndRollupConfig", func(t *testing.T) {
-		verifyArgsInvalid(t, "cannot specify both rollup.config and network", addRequiredArgs("--rollup.config=foo"))
+		verifyArgsInvalid(t, "cannot specify both rollup.config and network", addRequiredArgs(t, "--rollup.config=foo"))
 	})
 
 	t.Run("RollupConfig", func(t *testing.T) {
@@ -65,7 +71,7 @@ func TestNetwork(t *testing.T) {
 		err = os.WriteFile(configFile, configJson, os.ModePerm)
 		require.NoError(t, err)
 
-		cfg := configForArgs(t, addRequiredArgsExcept("--network", "--rollup.config", configFile))
+		cfg := configForArgs(t, addRequiredArgsExcept(t, "--network", "--rollup.config", configFile))
 		require.Equal(t, chaincfg.Goerli, *cfg.Rollup)
 	})
 
@@ -73,121 +79,130 @@ func TestNetwork(t *testing.T) {
 		name := name
 		expected := cfg
 		t.Run("Network_"+name, func(t *testing.T) {
-			cfg := configForArgs(t, replaceRequiredArg("--network", name))
+			cfg := configForArgs(t, replaceRequiredArg(t, "--network", name))
 			require.Equal(t, expected, *cfg.Rollup)
 		})
 	}
 }
 
 func TestDataDir(t *testing.T) {
+	t.Parallel()
 	expected := "/tmp/mainTestDataDir"
-	cfg := configForArgs(t, addRequiredArgs("--datadir", expected))
+	cfg := configForArgs(t, addRequiredArgs(t, "--datadir", expected))
 	require.Equal(t, expected, cfg.DataDir)
 }
 
 func TestL2(t *testing.T) {
+	t.Parallel()
 	expected := "https://example.com:8545"
-	cfg := configForArgs(t, addRequiredArgs("--l2", expected))
+	cfg := configForArgs(t, addRequiredArgs(t, "--l2", expected))
 	require.Equal(t, expected, cfg.L2URL)
 }
 
 func TestL2Genesis(t *testing.T) {
+	t.Parallel()
 	t.Run("Required", func(t *testing.T) {
-		verifyArgsInvalid(t, "flag l2.genesis is required", addRequiredArgsExcept("--l2.genesis"))
+		verifyArgsInvalid(t, "flag l2.genesis is required", addRequiredArgsExcept(t, "--l2.genesis"))
 	})
 
 	t.Run("Valid", func(t *testing.T) {
-		cfg := configForArgs(t, replaceRequiredArg("--l2.genesis", "/tmp/genesis.json"))
-		require.Equal(t, "/tmp/genesis.json", cfg.L2GenesisPath)
+		cfg := configForArgs(t, replaceRequiredArg(t, "--l2.genesis", writeValidGenesis(t)))
+		require.Equal(t, l2GenesisConfig, cfg.L2ChainConfig)
 	})
 }
 
 func TestL2Head(t *testing.T) {
+	t.Parallel()
 	t.Run("Required", func(t *testing.T) {
-		verifyArgsInvalid(t, "flag l2.head is required", addRequiredArgsExcept("--l2.head"))
+		verifyArgsInvalid(t, "flag l2.head is required", addRequiredArgsExcept(t, "--l2.head"))
 	})
 
 	t.Run("Valid", func(t *testing.T) {
-		cfg := configForArgs(t, replaceRequiredArg("--l2.head", l2HeadValue))
+		cfg := configForArgs(t, replaceRequiredArg(t, "--l2.head", l2HeadValue))
 		require.Equal(t, common.HexToHash(l2HeadValue), cfg.L2Head)
 	})
 
 	t.Run("Invalid", func(t *testing.T) {
-		verifyArgsInvalid(t, config.ErrInvalidL2Head.Error(), replaceRequiredArg("--l2.head", "something"))
+		verifyArgsInvalid(t, config.ErrInvalidL2Head.Error(), replaceRequiredArg(t, "--l2.head", "something"))
 	})
 }
 
 func TestL1Head(t *testing.T) {
+	t.Parallel()
 	t.Run("Required", func(t *testing.T) {
-		verifyArgsInvalid(t, "flag l1.head is required", addRequiredArgsExcept("--l1.head"))
+		verifyArgsInvalid(t, "flag l1.head is required", addRequiredArgsExcept(t, "--l1.head"))
 	})
 
 	t.Run("Valid", func(t *testing.T) {
-		cfg := configForArgs(t, replaceRequiredArg("--l1.head", l1HeadValue))
+		cfg := configForArgs(t, replaceRequiredArg(t, "--l1.head", l1HeadValue))
 		require.Equal(t, common.HexToHash(l1HeadValue), cfg.L1Head)
 	})
 
 	t.Run("Invalid", func(t *testing.T) {
-		verifyArgsInvalid(t, config.ErrInvalidL1Head.Error(), replaceRequiredArg("--l1.head", "something"))
+		verifyArgsInvalid(t, config.ErrInvalidL1Head.Error(), replaceRequiredArg(t, "--l1.head", "something"))
 	})
 }
 
 func TestL1(t *testing.T) {
+	t.Parallel()
 	expected := "https://example.com:8545"
-	cfg := configForArgs(t, addRequiredArgs("--l1", expected))
+	cfg := configForArgs(t, addRequiredArgs(t, "--l1", expected))
 	require.Equal(t, expected, cfg.L1URL)
 }
 
 func TestL1TrustRPC(t *testing.T) {
+	t.Parallel()
 	t.Run("DefaultFalse", func(t *testing.T) {
-		cfg := configForArgs(t, addRequiredArgs())
+		cfg := configForArgs(t, addRequiredArgs(t))
 		require.False(t, cfg.L1TrustRPC)
 	})
 	t.Run("Enabled", func(t *testing.T) {
-		cfg := configForArgs(t, addRequiredArgs("--l1.trustrpc"))
+		cfg := configForArgs(t, addRequiredArgs(t, "--l1.trustrpc"))
 		require.True(t, cfg.L1TrustRPC)
 	})
 	t.Run("EnabledWithArg", func(t *testing.T) {
-		cfg := configForArgs(t, addRequiredArgs("--l1.trustrpc=true"))
+		cfg := configForArgs(t, addRequiredArgs(t, "--l1.trustrpc=true"))
 		require.True(t, cfg.L1TrustRPC)
 	})
 	t.Run("Disabled", func(t *testing.T) {
-		cfg := configForArgs(t, addRequiredArgs("--l1.trustrpc=false"))
+		cfg := configForArgs(t, addRequiredArgs(t, "--l1.trustrpc=false"))
 		require.False(t, cfg.L1TrustRPC)
 	})
 }
 
 func TestL1RPCKind(t *testing.T) {
+	t.Parallel()
 	t.Run("DefaultBasic", func(t *testing.T) {
-		cfg := configForArgs(t, addRequiredArgs())
+		cfg := configForArgs(t, addRequiredArgs(t))
 		require.Equal(t, sources.RPCKindBasic, cfg.L1RPCKind)
 	})
 	for _, kind := range sources.RPCProviderKinds {
 		t.Run(kind.String(), func(t *testing.T) {
-			cfg := configForArgs(t, addRequiredArgs("--l1.rpckind", kind.String()))
+			cfg := configForArgs(t, addRequiredArgs(t, "--l1.rpckind", kind.String()))
 			require.Equal(t, kind, cfg.L1RPCKind)
 		})
 	}
 	t.Run("RequireLowercase", func(t *testing.T) {
-		verifyArgsInvalid(t, "rpc kind", addRequiredArgs("--l1.rpckind", "AlChemY"))
+		verifyArgsInvalid(t, "rpc kind", addRequiredArgs(t, "--l1.rpckind", "AlChemY"))
 	})
 	t.Run("UnknownKind", func(t *testing.T) {
-		verifyArgsInvalid(t, "\"foo\"", addRequiredArgs("--l1.rpckind", "foo"))
+		verifyArgsInvalid(t, "\"foo\"", addRequiredArgs(t, "--l1.rpckind", "foo"))
 	})
 }
 
 func TestL2Claim(t *testing.T) {
+	t.Parallel()
 	t.Run("Required", func(t *testing.T) {
-		verifyArgsInvalid(t, "flag l2.claim is required", addRequiredArgsExcept("--l2.claim"))
+		verifyArgsInvalid(t, "flag l2.claim is required", addRequiredArgsExcept(t, "--l2.claim"))
 	})
 
 	t.Run("Valid", func(t *testing.T) {
-		cfg := configForArgs(t, replaceRequiredArg("--l2.claim", l2ClaimValue))
+		cfg := configForArgs(t, replaceRequiredArg(t, "--l2.claim", l2ClaimValue))
 		require.EqualValues(t, common.HexToHash(l2ClaimValue), cfg.L2Claim)
 	})
 
 	t.Run("Invalid", func(t *testing.T) {
-		verifyArgsInvalid(t, config.ErrInvalidL2Claim.Error(), replaceRequiredArg("--l2.claim", "something"))
+		verifyArgsInvalid(t, config.ErrInvalidL2Claim.Error(), replaceRequiredArg(t, "--l2.claim", "something"))
 	})
 }
 
@@ -214,36 +229,46 @@ func runWithArgs(cliArgs []string) (log.Logger, *config.Config, error) {
 	return logger, cfg, err
 }
 
-func addRequiredArgs(args ...string) []string {
-	req := requiredArgs()
+func addRequiredArgs(t *testing.T, args ...string) []string {
+	req := requiredArgs(t)
 	combined := toArgList(req)
 	return append(combined, args...)
 }
 
-func addRequiredArgsExcept(name string, optionalArgs ...string) []string {
-	req := requiredArgs()
+func addRequiredArgsExcept(t *testing.T, name string, optionalArgs ...string) []string {
+	req := requiredArgs(t)
 	delete(req, name)
 	return append(toArgList(req), optionalArgs...)
 }
 
-func replaceRequiredArg(name string, value string) []string {
-	req := requiredArgs()
+func replaceRequiredArg(t *testing.T, name string, value string) []string {
+	req := requiredArgs(t)
 	req[name] = value
 	return toArgList(req)
 }
 
 // requiredArgs returns map of argument names to values which are the minimal arguments required
 // to create a valid Config
-func requiredArgs() map[string]string {
+func requiredArgs(t *testing.T) map[string]string {
+	genesisFile := writeValidGenesis(t)
 	return map[string]string{
 		"--network":    "goerli",
 		"--l1.head":    l1HeadValue,
 		"--l2.head":    l2HeadValue,
 		"--l2.claim":   l2ClaimValue,
-		"--l2.genesis": "genesis.json",
+		"--l2.genesis": genesisFile,
 	}
 }
 
+func writeValidGenesis(t *testing.T) string {
+	dir := t.TempDir()
+	j, err := json.Marshal(l2Genesis)
+	require.NoError(t, err)
+	genesisFile := dir + "/genesis.json"
+	require.NoError(t, os.WriteFile(genesisFile, j, 0666))
+	return genesisFile
+}
+
 func toArgList(req map[string]string) []string {
 	var combined []string
 	for name, value := range req {

op-program/host/config/config.go

 package config
 
 import (
+	"encoding/json"
 	"errors"
+	"fmt"
+	"os"
 
 	opnode "github.com/ethereum-optimism/optimism/op-node"
 	"github.com/ethereum-optimism/optimism/op-node/rollup"
 	"github.com/ethereum-optimism/optimism/op-node/sources"
 	"github.com/ethereum-optimism/optimism/op-program/host/flags"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/params"
 	"github.com/urfave/cli"
 )
 
@@ -23,15 +28,23 @@ var (
 
 type Config struct {
 	Rollup *rollup.Config
+	// DataDir is the directory to read/write pre-image data from/to.
+	//If not set, an in-memory key-value store is used and fetching data must be enabled
 	DataDir string
-	L2URL         string
-	L2GenesisPath string
+
+	// L1Head is the block has of the L1 chain head block
 	L1Head     common.Hash
-	L2Head        common.Hash
-	L2Claim       common.Hash
 	L1URL      string
 	L1TrustRPC bool
 	L1RPCKind  sources.RPCProviderKind
+
+	// L2Head is the agreed L2 block to start derivation from
+	L2Head common.Hash
+	L2URL  string
+	// L2Claim is the claimed L2 output root to verify
+	L2Claim common.Hash
+	// L2ChainConfig is the op-geth chain config for the L2 execution engine
+	L2ChainConfig *params.ChainConfig
 }
 
 func (c *Config) Check() error {
@@ -50,7 +63,7 @@ func (c *Config) Check() error {
 	if c.L2Claim == (common.Hash{}) {
 		return ErrInvalidL2Claim
 	}
-	if c.L2GenesisPath == "" {
+	if c.L2ChainConfig == nil {
 		return ErrMissingL2Genesis
 	}
 	if (c.L1URL != "") != (c.L2URL != "") {
@@ -67,10 +80,10 @@ func (c *Config) FetchingEnabled() bool {
 }
 
 // NewConfig creates a Config with all optional values set to the CLI default value
-func NewConfig(rollupCfg *rollup.Config, l2GenesisPath string, l1Head common.Hash, l2Head common.Hash, l2Claim common.Hash) *Config {
+func NewConfig(rollupCfg *rollup.Config, l2Genesis *params.ChainConfig, l1Head common.Hash, l2Head common.Hash, l2Claim common.Hash) *Config {
 	return &Config{
 		Rollup:        rollupCfg,
-		L2GenesisPath: l2GenesisPath,
+		L2ChainConfig: l2Genesis,
 		L1Head:        l1Head,
 		L2Head:        l2Head,
 		L2Claim:       l2Claim,
@@ -98,11 +111,16 @@ func NewConfigFromCLI(ctx *cli.Context) (*Config, error) {
 	if l1Head == (common.Hash{}) {
 		return nil, ErrInvalidL1Head
 	}
+	l2GenesisPath := ctx.GlobalString(flags.L2GenesisPath.Name)
+	l2ChainConfig, err := loadChainConfigFromGenesis(l2GenesisPath)
+	if err != nil {
+		return nil, fmt.Errorf("invalid genesis: %w", err)
+	}
 	return &Config{
 		Rollup:        rollupCfg,
 		DataDir:       ctx.GlobalString(flags.DataDir.Name),
 		L2URL:         ctx.GlobalString(flags.L2NodeAddr.Name),
-		L2GenesisPath: ctx.GlobalString(flags.L2GenesisPath.Name),
+		L2ChainConfig: l2ChainConfig,
 		L2Head:        l2Head,
 		L2Claim:       l2Claim,
 		L1Head:        l1Head,
@@ -111,3 +129,16 @@ func NewConfigFromCLI(ctx *cli.Context) (*Config, error) {
 		L1RPCKind:     sources.RPCProviderKind(ctx.GlobalString(flags.L1RPCProviderKind.Name)),
 	}, nil
 }
+
+func loadChainConfigFromGenesis(path string) (*params.ChainConfig, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("read l2 genesis file: %w", err)
+	}
+	var genesis core.Genesis
+	err = json.Unmarshal(data, &genesis)
+	if err != nil {
+		return nil, fmt.Errorf("parse l2 genesis file: %w", err)
+	}
+	return genesis.Config, nil
+}

op-program/host/config/config_test.go

@@ -6,11 +6,12 @@ import (
 	"github.com/ethereum-optimism/optimism/op-node/chaincfg"
 	"github.com/ethereum-optimism/optimism/op-node/rollup"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/params"
 	"github.com/stretchr/testify/require"
 )
 
 var validRollupConfig = &chaincfg.Goerli
-var validL2GenesisPath = "genesis.json"
+var validL2Genesis = params.GoerliChainConfig
 var validL1Head = common.Hash{0xaa}
 var validL2Head = common.Hash{0xbb}
 var validL2Claim = common.Hash{0xcc}
@@ -60,7 +61,7 @@ func TestL2ClaimRequired(t *testing.T) {
 
 func TestL2GenesisRequired(t *testing.T) {
 	config := validConfig()
-	config.L2GenesisPath = ""
+	config.L2ChainConfig = nil
 	err := config.Check()
 	require.ErrorIs(t, err, ErrMissingL2Genesis)
 }
@@ -132,7 +133,7 @@ func TestRequireDataDirInNonFetchingMode(t *testing.T) {
 }
 
 func validConfig() *Config {
-	cfg := NewConfig(validRollupConfig, validL2GenesisPath, validL1Head, validL2Head, validL2Claim)
+	cfg := NewConfig(validRollupConfig, validL2Genesis, validL1Head, validL2Head, validL2Claim)
 	cfg.DataDir = "/tmp/configTest"
 	return cfg
 }

op-program/host/l2/l2.go

@@ -2,25 +2,17 @@ package l2
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
-	"os"
 
 	cll2 "github.com/ethereum-optimism/optimism/op-program/client/l2"
 	"github.com/ethereum-optimism/optimism/op-program/host/config"
 	"github.com/ethereum-optimism/optimism/op-program/preimage"
-	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/log"
-	"github.com/ethereum/go-ethereum/params"
 )
 
 func NewEngine(logger log.Logger, pre preimage.Oracle, hint preimage.Hinter, cfg *config.Config) (*cll2.OracleEngine, error) {
 	oracle := cll2.NewCachingOracle(cll2.NewPreimageOracle(pre, hint))
-	genesis, err := loadL2Genesis(cfg)
-	if err != nil {
-		return nil, err
-	}
-	engineBackend, err := cll2.NewOracleBackedL2Chain(logger, oracle, genesis, cfg.L2Head)
+	engineBackend, err := cll2.NewOracleBackedL2Chain(logger, oracle, cfg.L2ChainConfig, cfg.L2Head)
 	if err != nil {
 		return nil, fmt.Errorf("create l2 chain: %w", err)
 	}
@@ -34,16 +26,3 @@ func NewFetchingOracle(ctx context.Context, logger log.Logger, cfg *config.Confi
 	}
 	return oracle, nil
 }
-
-func loadL2Genesis(cfg *config.Config) (*params.ChainConfig, error) {
-	data, err := os.ReadFile(cfg.L2GenesisPath)
-	if err != nil {
-		return nil, fmt.Errorf("read l2 genesis file: %w", err)
-	}
-	var genesis core.Genesis
-	err = json.Unmarshal(data, &genesis)
-	if err != nil {
-		return nil, fmt.Errorf("parse l2 genesis file: %w", err)
-	}
-	return genesis.Config, nil
-}