refactor: Enable library usage of rollup-boost

* unify client configuration with ClientArgs struct
* Consolidate BuilderArgs/L2ClientArgs into unified ClientArgs pattern
* Move JWT handling into ClientArgs with helper methods
* Update ProxyLayer to accept HttpClient instances instead of raw config
* Add RollupBoostServer::new_from_args for cleaner initialization
* Bump reth-rpc-layer to v1.8.2

Author: teddyknox

crates/rollup-boost/src/cli.rs

@@ -1,25 +1,18 @@
-use alloy_rpc_types_engine::JwtSecret;
 use clap::Parser;
-use eyre::bail;
 use jsonrpsee::{RpcModule, server::Server};
-use parking_lot::Mutex;
-use std::{
-    net::{IpAddr, SocketAddr},
-    path::PathBuf,
-    str::FromStr,
-    sync::Arc,
-};
+use std::{net::SocketAddr, path::PathBuf};
 use tokio::signal::unix::{SignalKind, signal as unix_signal};
 use tracing::{Level, info};
 
 use crate::{
-    BlockSelectionPolicy, Flashblocks, FlashblocksArgs, ProxyLayer, RollupBoostServer, RpcClient,
+    BlockSelectionPolicy, ClientArgs, DebugServer, FlashblocksArgs, PayloadSource, ProxyLayer,
+    RollupBoostServer,
     client::rpc::{BuilderArgs, L2ClientArgs},
     debug_api::ExecutionMode,
     get_version, init_metrics,
-    payload::PayloadSource,
     probe::ProbeLayer,
 };
+use crate::{FlashblocksService, RpcClient};
 
 #[derive(Clone, Parser, Debug)]
 #[clap(author, version = get_version(), about)]
@@ -112,90 +105,34 @@ impl RollupBoostArgs {
         init_metrics(&self)?;
 
         let debug_addr = format!("{}:{}", self.debug_host, self.debug_server_port);
-        let l2_client_args = self.l2_client;
-
-        let l2_auth_jwt = if let Some(secret) = l2_client_args.l2_jwt_token {
-            secret
-        } else if let Some(path) = l2_client_args.l2_jwt_path.as_ref() {
-            JwtSecret::from_file(path)?
-        } else {
-            bail!("Missing L2 Client JWT secret");
-        };
+        let l2_client_args: ClientArgs = self.l2_client.clone().into();
+        let l2_http_client = l2_client_args.new_http_client(PayloadSource::L2)?;
 
-        let l2_client = RpcClient::new(
-            l2_client_args.l2_url.clone(),
-            l2_auth_jwt,
-            l2_client_args.l2_timeout,
-            PayloadSource::L2,
-        )?;
-
-        let builder_args = self.builder;
-        let builder_auth_jwt = if let Some(secret) = builder_args.builder_jwt_token {
-            secret
-        } else if let Some(path) = builder_args.builder_jwt_path.as_ref() {
-            JwtSecret::from_file(path)?
-        } else {
-            bail!("Missing Builder JWT secret");
-        };
-
-        let builder_client = RpcClient::new(
-            builder_args.builder_url.clone(),
-            builder_auth_jwt,
-            builder_args.builder_timeout,
-            PayloadSource::Builder,
-        )?;
+        let builder_client_args: ClientArgs = self.builder.clone().into();
+        let builder_http_client = builder_client_args.new_http_client(PayloadSource::Builder)?;
 
         let (probe_layer, probes) = ProbeLayer::new();
-        let execution_mode = Arc::new(Mutex::new(self.execution_mode));
-
-        let (rpc_module, health_handle): (RpcModule<()>, _) = if self.flashblocks.flashblocks {
-            let flashblocks_args = self.flashblocks;
-            let inbound_url = flashblocks_args.flashblocks_builder_url;
-            let outbound_addr = SocketAddr::new(
-                IpAddr::from_str(&flashblocks_args.flashblocks_host)?,
-                flashblocks_args.flashblocks_port,
-            );
-
-            let builder_client = Arc::new(Flashblocks::run(
-                builder_client.clone(),
-                inbound_url,
-                outbound_addr,
-                flashblocks_args.flashblock_builder_ws_reconnect_ms,
-            )?);
-
-            let rollup_boost = RollupBoostServer::new(
-                l2_client,
-                builder_client,
-                execution_mode.clone(),
-                self.block_selection_policy,
-                probes.clone(),
-                self.external_state_root,
-                self.ignore_unhealthy_builders,
-            );
 
+        let (health_handle, rpc_module) = if self.flashblocks.flashblocks {
+            let rollup_boost = RollupBoostServer::<FlashblocksService>::new_from_args(
+                self.clone(),
+                probes.clone(),
+            )?;
             let health_handle = rollup_boost
                 .spawn_health_check(self.health_check_interval, self.max_unsafe_interval);
-
-            // Spawn the debug server
-            rollup_boost.start_debug_server(debug_addr.as_str()).await?;
-            (rollup_boost.try_into()?, health_handle)
+            let debug_server = DebugServer::new(rollup_boost.execution_mode.clone());
+            debug_server.run(&debug_addr).await?;
+            let rpc_module: RpcModule<()> = rollup_boost.try_into()?;
+            (health_handle, rpc_module)
         } else {
-            let rollup_boost = RollupBoostServer::new(
-                l2_client,
-                Arc::new(builder_client),
-                execution_mode.clone(),
-                self.block_selection_policy,
-                probes.clone(),
-                self.external_state_root,
-                self.ignore_unhealthy_builders,
-            );
-
+            let rollup_boost =
+                RollupBoostServer::<RpcClient>::new_from_args(self.clone(), probes.clone())?;
             let health_handle = rollup_boost
                 .spawn_health_check(self.health_check_interval, self.max_unsafe_interval);
-
-            // Spawn the debug server
-            rollup_boost.start_debug_server(debug_addr.as_str()).await?;
-            (rollup_boost.try_into()?, health_handle)
+            let debug_server = DebugServer::new(rollup_boost.execution_mode.clone());
+            debug_server.run(&debug_addr).await?;
+            let rpc_module: RpcModule<()> = rollup_boost.try_into()?;
+            (health_handle, rpc_module)
         };
 
         // Build and start the server
@@ -205,12 +142,8 @@ impl RollupBoostArgs {
             tower::ServiceBuilder::new()
                 .layer(probe_layer)
                 .layer(ProxyLayer::new(
-                    l2_client_args.l2_url,
-                    l2_auth_jwt,
-                    l2_client_args.l2_timeout,
-                    builder_args.builder_url,
-                    builder_auth_jwt,
-                    builder_args.builder_timeout,
+                    l2_http_client.clone(),
+                    builder_http_client.clone(),
                 ));
 
         let server = Server::builder()
@@ -247,6 +180,12 @@ impl RollupBoostArgs {
     }
 }
 
+impl Default for RollupBoostArgs {
+    fn default() -> Self {
+        Self::parse_from::<_, &str>(std::iter::empty())
+    }
+}
+
 #[derive(Clone, Debug)]
 pub enum LogFormat {
     Json,

crates/rollup-boost/src/client/rpc.rs

@@ -1,5 +1,6 @@
 use crate::EngineApiExt;
 use crate::client::auth::AuthLayer;
+use crate::client::http::HttpClient as RollupBoostHttpClient;
 use crate::payload::{NewPayload, OpExecutionPayloadEnvelope, PayloadSource, PayloadVersion};
 use crate::server::EngineApiClient;
 use crate::version::{CARGO_PKG_VERSION, VERGEN_GIT_SHA};
@@ -10,6 +11,7 @@ use alloy_rpc_types_engine::{
 };
 use alloy_rpc_types_eth::{Block, BlockNumberOrTag};
 use clap::{Parser, arg};
+use eyre::bail;
 use http::{HeaderMap, Uri};
 use jsonrpsee::core::async_trait;
 use jsonrpsee::core::middleware::layer::RpcLogger;
@@ -101,7 +103,7 @@ impl From<RpcClientError> for ErrorObjectOwned {
 ///
 /// - **Engine API** calls are faciliated via the `auth_client` (requires JWT authentication).
 ///
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct RpcClient {
     /// Handles requests to the authenticated Engine API (requires JWT authentication)
     auth_client: RpcClientService,
@@ -376,8 +378,57 @@ impl EngineApiExt for RpcClient {
     }
 }
 
+#[derive(Debug, Clone)]
+pub struct ClientArgs {
+    /// Auth server address
+    pub url: Uri,
+
+    /// Hex encoded JWT secret to use for the authenticated engine-API RPC server.
+    pub jwt_token: Option<JwtSecret>,
+
+    /// Path to a JWT secret to use for the authenticated engine-API RPC server.
+    pub jwt_path: Option<PathBuf>,
+
+    /// Timeout for http calls in milliseconds
+    pub timeout: u64,
+}
+
+impl ClientArgs {
+    fn get_auth_jwt(&self) -> eyre::Result<JwtSecret> {
+        if let Some(secret) = self.jwt_token {
+            Ok(secret)
+        } else if let Some(path) = self.jwt_path.as_ref() {
+            Ok(JwtSecret::from_file(path)?)
+        } else {
+            bail!("Missing Client JWT secret");
+        }
+    }
+
+    pub fn new_rpc_client(&self, payload_source: PayloadSource) -> eyre::Result<RpcClient> {
+        RpcClient::new(
+            self.url.clone(),
+            self.get_auth_jwt()?,
+            self.timeout,
+            payload_source,
+        )
+        .map_err(eyre::Report::from)
+    }
+
+    pub fn new_http_client(
+        &self,
+        payload_source: PayloadSource,
+    ) -> eyre::Result<RollupBoostHttpClient> {
+        Ok(RollupBoostHttpClient::new(
+            self.url.clone(),
+            self.get_auth_jwt()?,
+            payload_source,
+            self.timeout,
+        ))
+    }
+}
+
 /// Generates Clap argument structs with a prefix to create a unique namespace when specifying RPC client config via the CLI.
-macro_rules! define_rpc_args {
+macro_rules! define_client_args {
     ($(($name:ident, $prefix:ident)),*) => {
         $(
             paste! {
@@ -399,12 +450,24 @@ macro_rules! define_rpc_args {
                     #[arg(long, env, default_value_t = 1000)]
                     pub [<$prefix _timeout>]: u64,
                 }
+
+
+                impl From<$name> for ClientArgs {
+                    fn from(args: $name) -> Self {
+                        ClientArgs {
+                            url: args.[<$prefix _url>].clone(),
+                            jwt_token: args.[<$prefix _jwt_token>].clone(),
+                            jwt_path: args.[<$prefix _jwt_path>],
+                            timeout: args.[<$prefix _timeout>],
+                        }
+                    }
+                }
             }
         )*
     };
 }
 
-define_rpc_args!((BuilderArgs, builder), (L2ClientArgs, l2));
+define_client_args!((BuilderArgs, builder), (L2ClientArgs, l2));
 
 #[cfg(test)]
 pub mod tests {

crates/rollup-boost/src/flashblocks/mod.rs

@@ -4,9 +4,9 @@ pub use launcher::*;
 
 mod primitives;
 mod service;
+pub use service::*;
 
 pub use primitives::*;
-pub use service::*;
 
 mod inbound;
 mod outbound;

crates/rollup-boost/src/flashblocks/service.rs

@@ -164,7 +164,7 @@ impl FlashblockBuilder {
     }
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct FlashblocksService {
     client: RpcClient,
 

crates/rollup-boost/src/payload.rs

@@ -239,6 +239,7 @@ pub struct PayloadTrace {
     pub trace_id: Option<tracing::Id>,
 }
 
+#[derive(Debug)]
 pub struct PayloadTraceContext {
     block_hash_to_payload_ids: Cache<B256, Vec<PayloadId>>,
     payload_id: Cache<PayloadId, PayloadTrace>,

crates/rollup-boost/src/probe.rs

@@ -62,7 +62,7 @@ pub struct ProbeLayer {
 }
 
 impl ProbeLayer {
-    pub(crate) fn new() -> (Self, Arc<Probes>) {
+    pub fn new() -> (Self, Arc<Probes>) {
         let probes = Arc::new(Probes::default());
         (
             Self {