Enable execution only mode in nitro

changelog/bragaigor-nit-4241.md

@@ -0,0 +1,5 @@
+### Changed
+- enable execution and consensus only mode
+
+### Configuration
+- Add `--chain.genesis-block-num` genesis block number for the L2 chain

cmd/conf/chain.go

@@ -53,24 +53,27 @@ func (c *ParentChainConfig) Validate() error {
 }
 
 type L2Config struct {
-	ID        uint64                   `koanf:"id"`
-	Name      string                   `koanf:"name"`
-	InfoFiles []string                 `koanf:"info-files"`
-	InfoJson  string                   `koanf:"info-json"`
-	DevWallet genericconf.WalletConfig `koanf:"dev-wallet"`
+	ID              uint64                   `koanf:"id"`
+	Name            string                   `koanf:"name"`
+	GenesisBlockNum uint64                   `koanf:"genesis-block-num"`
+	InfoFiles       []string                 `koanf:"info-files"`
+	InfoJson        string                   `koanf:"info-json"`
+	DevWallet       genericconf.WalletConfig `koanf:"dev-wallet"`
 }
 
 var L2ConfigDefault = L2Config{
-	ID:        0,
-	Name:      "",
-	InfoFiles: []string{}, // Default file used is chaininfo/arbitrum_chain_info.json, stored in DefaultChainInfo in chain_info.go
-	InfoJson:  "",
-	DevWallet: genericconf.WalletConfigDefault,
+	ID:              0,
+	Name:            "",
+	GenesisBlockNum: 0,
+	InfoFiles:       []string{}, // Default file used is chaininfo/arbitrum_chain_info.json, stored in DefaultChainInfo in chain_info.go
+	InfoJson:        "",
+	DevWallet:       genericconf.WalletConfigDefault,
 }
 
 func L2ConfigAddOptions(prefix string, f *pflag.FlagSet) {
 	f.Uint64(prefix+".id", L2ConfigDefault.ID, "L2 chain ID (determines Arbitrum network)")
 	f.String(prefix+".name", L2ConfigDefault.Name, "L2 chain name (determines Arbitrum network)")
+	f.Uint64(prefix+".genesis-block-num", L2ConfigDefault.GenesisBlockNum, "genesis block number for the L2 chain")
 	f.StringSlice(prefix+".info-files", L2ConfigDefault.InfoFiles, "L2 chain info json files")
 	f.String(prefix+".info-json", L2ConfigDefault.InfoJson, "L2 chain info in json string format")
 

cmd/nitro/config/config.go

@@ -143,6 +143,10 @@ func (c *NodeConfig) Validate() error {
 	if err := c.ParentChain.Validate(); err != nil {
 		return err
 	}
+
+	if c.Execution.RPCServer.Enable && c.Node.RPCServer.Enable {
+		return errors.New("rpc mode supports running either execution or consensus in a single process, not both; disable either execution.rpc-server.enable or node.rpc-server.enable")
+	}
 	if err := c.Node.Validate(); err != nil {
 		return err
 	}
@@ -169,8 +173,10 @@ func (c *NodeConfig) Validate() error {
 		if c.Node.Sequencer || c.Node.BatchPoster.Enable {
 			return errors.New("sequencing and batch-posting are currently not supported when connecting to an execution client over RPC")
 		}
-	} else if c.Execution.ConsensusRPCClient.URL != "" {
-		return errors.New("consensus is connecting directly to execution but execution is connecting to consensus over an rpc- invalid case")
+	} else if c.Execution.RPCServer.Enable && c.Execution.ConsensusRPCClient.URL == "" {
+		return errors.New("communication over rpc is enabled on execution but consensus RPC client is not set")
+	} else if c.Node.RPCServer.Enable && c.Node.ExecutionRPCClient.URL == "" {
+		return errors.New("communication over rpc is enabled on consensus but execution RPC client is not set")
 	}
 	if err := c.BlocksReExecutor.Validate(); err != nil {
 		return err