chore: add missing getters (#13444)

crates/optimism/rpc/src/eth/mod.rs

@@ -79,6 +79,16 @@ where
                       + 'static,
     >,
 {
+    /// Returns a reference to the [`EthApiNodeBackend`].
+    pub fn eth_api(&self) -> &EthApiNodeBackend<N> {
+        self.inner.eth_api()
+    }
+
+    /// Returns the configured sequencer client, if any.
+    pub fn sequencer_client(&self) -> Option<&SequencerClient> {
+        self.inner.sequencer_client()
+    }
+
     /// Build a [`OpEthApi`] using [`OpEthApiBuilder`].
     pub const fn builder() -> OpEthApiBuilder {
         OpEthApiBuilder::new()
@@ -273,6 +283,18 @@ struct OpEthApiInner<N: OpNodeCore> {
     sequencer_client: Option<SequencerClient>,
 }
 
+impl<N: OpNodeCore> OpEthApiInner<N> {
+    /// Returns a reference to the [`EthApiNodeBackend`].
+    const fn eth_api(&self) -> &EthApiNodeBackend<N> {
+        &self.eth_api
+    }
+
+    /// Returns the configured sequencer client, if any.
+    const fn sequencer_client(&self) -> Option<&SequencerClient> {
+        self.sequencer_client.as_ref()
+    }
+}
+
 /// A type that knows how to build a [`OpEthApi`].
 #[derive(Debug, Default)]
 pub struct OpEthApiBuilder {