feat: op-program supports custom chain config

op-program/Makefile

@@ -51,6 +51,11 @@ test:
 verify-sepolia: op-program-host op-program-client
 	env GO111MODULE=on go run ./verify/sepolia/cmd/sepolia.go --l1 $$SEPOLIA_L1URL --l1.beacon $$SEPOLIA_BEACON_URL --l2 $$SEPOLIA_L2URL --datadir /tmp/test-sepolia
 
+verify-devnet:
+	cp ../.devnet/rollup.json ./chainconfig/configs
+	cp ../.devnet/genesis-l2.json ./chainconfig/configs
+	env GO111MODULE=on go run ./verify/devnet/cmd/devnet.go --l1 http://localhost:8545 --l1.beacon http://localhost:5052 --l2 http://localhost:9545 --datadir /tmp/test-devnet
+
 capture-mainnet-genesis: op-program-host op-program-client
 	rm -rf "$(COMPAT_DIR)/mainnet-genesis" "$(COMPAT_DIR)/mainnet-genesis.tar.bz"
 	env GO111MODULE=on go run ./verify/mainnet/cmd/mainnet.go --l1 $$MAINNET_L1URL --l1.beacon $$MAINNET_BEACON_URL --l2 $$MAINNET_L2URL --datadir "$(COMPAT_DIR)/mainnet-genesis" --l1.head "0x4903424f6cc2cfba7c2bf8c8f48ca46721c963fa64b411cfee3697b781e3e5f1" --l2.start "105235063" --l2.end "105235064"
@@ -97,6 +102,7 @@ verify-compat: verify-sepolia-delta verify-sepolia-ecotone verify-mainnet-genesi
 	test \
 	capture-goerli-verify \
 	verify-sepolia \
+	verify-devnet \
 	capture-mainnet-genesis \
 	capture-sepolia-delta \
 	capture-sepolia-ecotone \

op-program/chainconfig/chaincfg.go

@@ -1,13 +1,20 @@
 package chainconfig
 
 import (
+	"embed"
+	"encoding/json"
 	"fmt"
 
 	"github.com/ethereum-optimism/optimism/op-node/rollup"
+	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/params"
 )
 
-var OPSepoliaChainConfig, OPMainnetChainConfig *params.ChainConfig
+//go:embed configs/*json
+var customChainConfigFS embed.FS
+
+var OPSepoliaChainConfig, OPMainnetChainConfig, CustomChainConfig *params.ChainConfig
+var CustomRollupConfig rollup.Config
 
 func init() {
 	mustLoadConfig := func(chainID uint64) *params.ChainConfig {
@@ -19,6 +26,37 @@ func init() {
 	}
 	OPSepoliaChainConfig = mustLoadConfig(11155420)
 	OPMainnetChainConfig = mustLoadConfig(10)
+
+	// Load custom l2 genesis and rollup config from embed FS
+	data, err := customChainConfigFS.ReadFile("configs/genesis-l2.json")
+	if err != nil {
+		panic(err)
+	}
+	var genesis core.Genesis
+	err = json.Unmarshal(data, &genesis)
+	if err != nil {
+		panic(err)
+	}
+	CustomChainConfig = genesis.Config
+
+	file, err := customChainConfigFS.Open("configs/rollup.json")
+	if err != nil {
+		panic(err)
+	}
+	dec := json.NewDecoder(file)
+	dec.DisallowUnknownFields()
+	if err := dec.Decode(&CustomRollupConfig); err != nil {
+		panic(err)
+	}
+	// Both configs must have the same L2 chainID
+	if CustomChainConfig.ChainID.Uint64() != CustomRollupConfig.L2ChainID.Uint64() {
+		panic(fmt.Errorf("mismatched genesis-l2.json chainid %d vs rollup.json chainid %d", CustomChainConfig.ChainID.Uint64(), CustomRollupConfig.L2ChainID.Uint64()))
+	}
+	// Do not override existing superchain registered configs
+	if _, err := params.LoadOPStackChainConfig(CustomChainConfig.ChainID.Uint64()); err == nil {
+		panic(fmt.Errorf("cannot override existing superchain registered config"))
+	}
+	L2ChainConfigsByChainID[CustomChainConfig.ChainID.Uint64()] = CustomChainConfig
 }
 
 var L2ChainConfigsByChainID = map[uint64]*params.ChainConfig{
@@ -27,6 +65,9 @@ var L2ChainConfigsByChainID = map[uint64]*params.ChainConfig{
 }
 
 func RollupConfigByChainID(chainID uint64) (*rollup.Config, error) {
+	if chainID == CustomRollupConfig.L2ChainID.Uint64() {
+		return &CustomRollupConfig, nil
+	}
 	config, err := rollup.LoadOPStackRollupConfig(chainID)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get rollup config for chain ID %d: %w", chainID, err)
@@ -35,5 +76,8 @@ func RollupConfigByChainID(chainID uint64) (*rollup.Config, error) {
 }
 
 func ChainConfigByChainID(chainID uint64) (*params.ChainConfig, error) {
+	if chainID == CustomChainConfig.ChainID.Uint64() {
+		return CustomChainConfig, nil
+	}
 	return params.LoadOPStackChainConfig(chainID)
 }