Update comments and delete serialize for view number

node/libs/roles/src/validator/messages/consensus.rs

@@ -358,7 +358,7 @@ impl std::ops::BitAnd for &Signers {
 }
 
 /// A struct that represents a view number.
-#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct ViewNumber(pub u64);
 
 impl ViewNumber {

node/tools/src/rpc/methods/last_view.rs

@@ -1,19 +1,29 @@
 //! Peers method for RPC server.
-use jsonrpsee::core::RpcResult;
+use anyhow::Context;
+use jsonrpsee::{
+    core::RpcResult,
+    types::{error::ErrorCode, ErrorObjectOwned},
+};
 use std::sync::Arc;
 use zksync_consensus_storage::BlockStore;
 
-/// Config response for /config endpoint.
+/// Last view response for /last_view endpoint.
 pub fn callback(node_storage: Arc<BlockStore>) -> RpcResult<serde_json::Value> {
     let sub = &mut node_storage.subscribe();
     let state = sub.borrow().clone();
-    let a = state.last.unwrap().view().number;
+    let last_view = state
+        .last
+        .context("Failed to get last state")
+        .map_err(|_| ErrorObjectOwned::from(ErrorCode::InternalError))?
+        .view()
+        .number
+        .0;
     Ok(serde_json::json!({
-        "last_view": a
+        "last_view": last_view
     }))
 }
 
-/// Config method name.
+/// Last view method name.
 pub fn method() -> &'static str {
     "last_view"
 }