chore: create election backbone

[renancloudwalk]

No description provided.

[github-actions]

PR Review 🔍

⏱️ Estimated effort to review [1-5]	4, due to the complexity and the number of changes in the consensus logic, including new data structures and significant modifications to the existing methods. Understanding the implications of these changes on the system's behavior, especially in a consensus algorithm, requires careful consideration and thorough testing.
🧪 Relevant tests	No
⚡ Possible issues	Possible Bug: The discover_peers method initializes peers with a new Vec, but it should be using the HashMap from the Consensus struct. This could lead to a situation where the peers are not correctly tracked or updated.
	Data Race: The use of Arc<Mutex<...>> for peers suggests shared mutability, but proper locking and error handling need to be ensured to prevent data races or deadlocks.
🔒 Security concerns	No

Code feedback:

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relevant file	src/eth/consensus.rs
suggestion	Consider initializing the peers HashMap directly in the discover_peers method to avoid potential issues with peer tracking. This change ensures that the peer discovery process populates the shared state correctly. [important]
relevant line	let peers = Arc::new(Mutex::new(HashMap::new()));

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relevant file	src/eth/consensus.rs
suggestion	Implement error handling for the lock acquisition on peers in the discover_peers method. This is crucial to prevent the application from panicking in case the lock is poisoned. [important]
relevant line	let mut peers_lock = consensus.peers.lock().await;

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relevant file	src/eth/consensus.rs
suggestion	Replace the placeholder term 0 in the discover_peers method with a dynamic value that reflects the current term of the consensus. This change is essential for maintaining the correct state of the consensus algorithm. [important]
relevant line	term: 0, // Replace with actual term

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relevant file	src/eth/consensus.rs
suggestion	Modify the logging statement in discover_peers to include more details about each peer, such as their role and last heartbeat. This enhancement will improve the observability of the system. [medium]
relevant line	"Discovered peers",

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[github-actions]

PR Code Suggestions ✨

Category	Suggestion	Score
Robustness	Add error handling for peer connection failures Implement error handling for the connect method when creating AppendEntryServiceClient instances. This prevents the application from panicking or behaving unexpectedly if the connection fails. src/eth/consensus.rs [250] -let client = AppendEntryServiceClient::connect(address.clone()).await?; +let client = match AppendEntryServiceClient::connect(address.clone()).await { + Ok(client) => client, + Err(e) => { + tracing::error!("Failed to connect to {}: {:?}", address, e); + continue; // Skip this peer or handle appropriately + } +}; Suggestion importance[1-10]: 9 Why: Adding error handling for the connect method is crucial for robustness, as it ensures the application can gracefully handle connection failures without panicking or behaving unexpectedly.	9
Possible issue	Replace hardcoded term initialization with dynamic consensus term Replace the hardcoded term value in the Peer struct initialization with a dynamic value that reflects the current consensus term. This ensures that the peer's term is correctly initialized according to the current state of the consensus algorithm. src/eth/consensus.rs [258] -term: 0, // Replace with actual term +term: current_term, // Use the actual current term from consensus state Suggestion importance[1-10]: 8 Why: This suggestion addresses a significant issue by ensuring that the term value in the Peer struct is dynamically set according to the current consensus state, which is crucial for maintaining the correctness of the consensus algorithm.	8
Enhancement	Handle None case for leader_name more explicitly Consider handling the case where leader_name is None more explicitly in the new function to avoid using an empty string as a default, which might lead to unexpected behavior in consensus operations. src/eth/consensus.rs [102] -leader_name: leader_name.clone().unwrap_or_default(), +leader_name: leader_name.clone().unwrap_or_else(|| "default_leader".to_string()), Suggestion importance[1-10]: 7 Why: This suggestion improves the robustness of the code by explicitly handling the None case for leader_name, which can prevent potential issues related to using an empty string as a default value.	7
Performance	Reduce unnecessary cloning of the address string in the peer discovery process Optimize the peer discovery process by avoiding cloning the address string multiple times within the loop. This can be achieved by using a reference where possible. src/eth/consensus.rs [249-260] let address = format!("http://{}.stratus-api.{}.svc.cluster.local:3777", pod_name, namespace); -let client = AppendEntryServiceClient::connect(address.clone()).await?; +let client = AppendEntryServiceClient::connect(&address).await?; peers.push((address, peer)); Suggestion importance[1-10]: 6 Why: This suggestion provides a minor performance improvement by reducing unnecessary cloning of the address string, which can slightly optimize the peer discovery process.	6