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chore: actually pass the block header #943

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merged 1 commit into from
May 29, 2024
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@renancloudwalk renancloudwalk requested a review from a team as a code owner May 29, 2024 00:30
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PR Review 🔍

⏱️ Estimated effort to review [1-5]

3, because the PR involves changes in critical consensus components of a blockchain system, which requires careful review to ensure correctness and security. The changes include modifications to how block headers are handled and passed among functions, which is a sensitive part of the blockchain's operation.

🧪 Relevant tests

No

⚡ Possible issues

Possible Bug: The conversion from BlockHeader to append_entry::BlockHeader in src/eth/primitives/block_header.rs assumes all fields can be directly converted or cloned without error handling or validation. This might lead to runtime errors if any field does not meet expectations or if conversions fail.

Data Integrity: The direct cloning of extra_data in the From implementation for BlockHeader might not respect the original intent of data encapsulation and could lead to unintended data sharing or modifications.

🔒 Security concerns

No

Code feedback:
relevant filesrc/eth/consensus.rs
suggestion      

Consider adding error handling for the conversion from &block.header to BlockHeader in append_block_commit_to_followers. This will ensure that any issues during the conversion are caught and handled appropriately, preventing potential runtime panics. [important]

relevant linelet header: BlockHeader = (&block.header).into();

relevant filesrc/eth/primitives/block_header.rs
suggestion      

Implement error checking or validation in the From<&BlockHeader> implementation for append_entry::BlockHeader to ensure all fields meet required conditions before conversion. This can prevent issues related to invalid data being used in critical blockchain operations. [important]

relevant lineimpl From<&BlockHeader> for append_entry::BlockHeader {

relevant filesrc/eth/primitives/unix_time.rs
suggestion      

Since UnixTime is critical for timestamp handling, consider implementing a safe conversion method that handles potential overflows or underflows when converting UnixTime to u64. This can enhance the robustness of time handling in your blockchain application. [medium]

relevant linepub fn as_u64(&self) -> u64 {

relevant filesrc/eth/primitives/block_header.rs
suggestion      

To avoid potential data integrity issues, consider implementing a more controlled way of copying or sharing extra_data during the conversion from BlockHeader to append_entry::BlockHeader. This might involve using a method that explicitly checks or sanitizes the data before cloning. [medium]

relevant lineextra_data: block_header.extra_data.clone().0,

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PR Code Suggestions ✨

CategorySuggestion                                                                                                                                    Score
Possible bug
Add error handling in data conversion to prevent potential runtime panics

Ensure that the From trait implementation for append_entry::BlockHeader handles potential
data conversion errors gracefully instead of directly using into() which might panic.

src/eth/primitives/block_header.rs [170-184]

-number: block_header.number.into(),
-size: block_header.size.into(),
+number: block_header.number.try_into().unwrap_or_default(),
+size: block_header.size.try_into().unwrap_or_default(),
 
Suggestion importance[1-10]: 9

Why: Adding error handling in data conversion is crucial to prevent potential runtime panics, making the code more robust and reliable. This addresses a possible bug and is highly valuable.

9
Performance
Improve performance by passing followers as a reference

Consider using a reference to followers in the function signature to avoid unnecessary
data cloning, which can improve performance especially if followers contains a large
number of elements.

src/eth/consensus.rs [257]

-pub async fn append_block_commit_to_followers(block: Block, followers: Vec<Peer>) -> Result<(), anyhow::Error>
+pub async fn append_block_commit_to_followers(block: Block, followers: &Vec<Peer>) -> Result<(), anyhow::Error>
 
Suggestion importance[1-10]: 8

Why: Using a reference to followers can indeed improve performance by avoiding unnecessary cloning, which is particularly beneficial if followers is large. This is a meaningful optimization.

8
Enhancement
Replace hardcoded values with dynamic ones for better flexibility

Replace the hardcoded transaction_hashes and term with parameters or dynamically
calculated values to make the function more flexible and applicable to different contexts.

src/eth/consensus.rs [259-261]

-let transaction_hashes = vec!["hash1".to_string(), "hash2".to_string()];
-let term = 0;
+let transaction_hashes = generate_transaction_hashes(&block); // This function needs to be implemented
+let term = current_term(); // This function needs to be implemented
 
Suggestion importance[1-10]: 7

Why: Replacing hardcoded values with dynamically calculated ones or parameters can improve the flexibility and reusability of the function. However, the suggestion requires additional implementation which is not trivial.

7
Maintainability
Add documentation to the new method for better code clarity

Add documentation to the new as_u64 method to explain its purpose and usage, which helps
maintain code readability and usability.

src/eth/primitives/unix_time.rs [47-49]

+/// Returns the UNIX time as a `u64`.
+/// This method is useful for scenarios where a u64 timestamp is required.
 pub fn as_u64(&self) -> u64 {
     self.0
 }
 
Suggestion importance[1-10]: 6

Why: Adding documentation improves code readability and maintainability, helping future developers understand the purpose and usage of the method. However, it is a minor improvement.

6

@renancloudwalk renancloudwalk enabled auto-merge (squash) May 29, 2024 00:34
@renancloudwalk renancloudwalk merged commit 8e9c247 into main May 29, 2024
33 checks passed
@renancloudwalk renancloudwalk deleted the horizontal-block-header branch May 29, 2024 00:45
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