let task_executor = builder.task_executor().clone();

crates/gwyneth-rbuilder/src/main.rs

@@ -37,11 +37,8 @@ fn main() -> eyre::Result<()> {
 
     if let Err(err) = Cli::<GwynethArgs>::parse().run(|builder, arg| async move {
         let l1_node_config = builder.config().clone();
-        let gwyneth_nodes = create_gwyneth_nodes(
-            &arg, 
-            builder.task_executor().clone(),
-            &l1_node_config
-        ).await;
+        let task_executor = builder.task_executor().clone();
+        let gwyneth_nodes = create_gwyneth_nodes(&arg, task_executor.clone(), &l1_node_config).await;
 
         let enable_engine2 = arg.experimental;
         match enable_engine2 {
@@ -70,7 +67,7 @@ fn main() -> eyre::Result<()> {
                     })
                     .launch_with_fn(|builder| {
                         let launcher = EngineNodeLauncher::new(
-                            builder.task_executor().clone(),
+                            task_executor,
                             builder.config().datadir(),
                         );
                         builder.launch_with(launcher)
@@ -133,6 +130,8 @@ where
             let mut config: Config = load_config_toml_and_env(
                 arg.rbuilder_config.clone().expect("Gwyneth-rbuilder needs config path")
             )?;
+            // Where we set L1 rpc, proposer pk and rollup contract address
+            config.l1_config.update_in_process_setting(&l1_node_config);
             config.base_config.update_in_process_setting(arg, l1_node_config);
 
             // TODO: Check removing this is OK. It seems reth already sets up the global tracing

crates/rbuilder/src/live_builder/base_config.rs

@@ -256,7 +256,6 @@ impl BaseConfig {
         if self.l2_ipc_paths.is_none() {
             eyre::bail!("IPC should be provided with config or in-process GwynethArgs");
         }
-        // TODO(Cecilia): get this from exex
         let layer2_info = tokio::runtime::Handle::current().block_on(Layer2Info::<P>::new(
             l2_providers,
             &self.l2_ipc_paths.clone().unwrap(),

crates/rbuilder/src/live_builder/config.rs

@@ -51,7 +51,7 @@ use ethereum_consensus::{
     state_transition::Context as ContextEth,
 };
 use eyre::Context;
-use reth::tasks::pool::BlockingTaskPool;
+use reth::{builder::NodeConfig, tasks::pool::BlockingTaskPool};
 use reth_chainspec::{Chain, ChainSpec, NamedChain};
 use reth_db::{Database, DatabaseEnv};
 use reth_payload_builder::database::SyncCachedReads as CachedReads;
@@ -61,7 +61,7 @@ use reth_provider::{
 };
 use serde::Deserialize;
 use serde_with::{serde_as, OneOrMany};
-use std::fmt::Debug;
+use std::{fmt::Debug, net::SocketAddr};
 use std::{
     path::{Path, PathBuf},
     str::FromStr,
@@ -158,6 +158,19 @@ impl Default for L1Config {
 }
 
 impl L1Config {
+
+    pub fn update_in_process_setting(
+        &mut self, 
+        l1_node_config: &NodeConfig,
+    ) {
+        assert!(!self.relays.is_empty(), "Must contains at least one relay for L1 proposing");
+        let relay_proposer = self.relays.get_mut(0).unwrap();
+
+        assert!(relay_proposer.l1_proposer_pk.is_some(), "L1 proposer private key should be set");
+        assert!(relay_proposer.l1_rollup_contract.is_some(), "L1 rollup contract should be set");    
+        relay_proposer.l1_rpc_url = Some(SocketAddr::new(l1_node_config.rpc.http_addr, l1_node_config.rpc.http_port).to_string());
+    }
+
     pub fn resolve_cl_node_urls(&self) -> eyre::Result<Vec<String>> {
         crate::live_builder::base_config::resolve_env_or_values::<String>(&self.cl_node_url)
     }

crates/rbuilder/src/primitives/mev_boost.rs

@@ -34,7 +34,7 @@ pub struct RelayConfig {
     #[serde(default, deserialize_with = "deserialize_env_var")]
     pub l1_rpc_url: Option<String>,
     pub l1_proposer_pk: Option<String>,
-    pub l1_smart_contract_address: Option<String>,
+    pub l1_rollup_contract: Option<String>,
 }
 
 impl RelayConfig {
@@ -93,7 +93,7 @@ impl MevBoostRelay {
         let block_proposer =
             if let (Some(l1_rpc_url), Some(l1_smart_contract_address), Some(l1_proposer_pk)) = (
                 &config.l1_rpc_url,
-                &config.l1_smart_contract_address,
+                &config.l1_rollup_contract,
                 &config.l1_proposer_pk,
             ) {
                 Some(BlockProposer::new(