feat: resolve domains in enode strings (#8188)

Co-authored-by: Serge Radinovich <47865535+sergerad@users.noreply.github.com>

crates/node/builder/Cargo.toml

@@ -58,6 +58,7 @@ eyre.workspace = true
 fdlimit.workspace = true
 confy.workspace = true
 rayon.workspace = true
+backon.workspace = true
 
 [dev-dependencies]
 tempfile.workspace = true

crates/node/builder/src/launch/common.rs

@@ -1,5 +1,6 @@
 //! Helper types that can be used by launchers.
 
+use backon::{ConstantBuilder, Retryable};
 use eyre::Context;
 use rayon::ThreadPoolBuilder;
 use reth_auto_seal_consensus::MiningMode;
@@ -56,17 +57,19 @@ impl LaunchContext {
     /// `config`.
     ///
     /// Attaches both the `NodeConfig` and the loaded `reth.toml` config to the launch context.
-    pub fn with_loaded_toml_config(
+    pub async fn with_loaded_toml_config(
         self,
         config: NodeConfig,
     ) -> eyre::Result<LaunchContextWith<WithConfigs>> {
-        let toml_config = self.load_toml_config(&config)?;
+        let toml_config = self.load_toml_config(&config).await?;
         Ok(self.with(WithConfigs { config, toml_config }))
     }
 
     /// Loads the reth config with the configured `data_dir` and overrides settings according to the
     /// `config`.
-    pub fn load_toml_config(&self, config: &NodeConfig) -> eyre::Result<reth_config::Config> {
+    ///
+    /// This is async because the trusted peers may have to be resolved.
+    pub async fn load_toml_config(&self, config: &NodeConfig) -> eyre::Result<reth_config::Config> {
         let config_path = config.config.clone().unwrap_or_else(|| self.data_dir.config());
 
         let mut toml_config = confy::load_path::<reth_config::Config>(&config_path)
@@ -81,9 +84,16 @@ impl LaunchContext {
 
         if !config.network.trusted_peers.is_empty() {
             info!(target: "reth::cli", "Adding trusted nodes");
-            config.network.trusted_peers.iter().for_each(|peer| {
-                toml_config.peers.trusted_nodes.insert(*peer);
-            });
+
+            // resolve trusted peers if they use a domain instead of dns
+            for peer in &config.network.trusted_peers {
+                let backoff = ConstantBuilder::default().with_max_times(config.network.dns_retries);
+                let resolved = (move || { peer.resolve() })
+                .retry(&backoff)
+                .notify(|err, _| warn!(target: "reth::cli", "Error resolving peer domain: {err}. Retrying..."))
+                .await?;
+                toml_config.peers.trusted_nodes.insert(resolved);
+            }
         }
 
         Ok(toml_config)

crates/node/builder/src/launch/mod.rs

@@ -94,7 +94,7 @@ where
         let ctx = ctx
             .with_configured_globals()
             // load the toml config
-            .with_loaded_toml_config(config)?
+            .with_loaded_toml_config(config).await?
             // attach the database
             .attach(database.clone())
             // ensure certain settings take effect