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3, because the PR involves significant changes across multiple files, including logic changes in mining and execution functions, and the introduction of new helper functions. Understanding the impact of these changes on the system's behavior requires a good grasp of the existing architecture and the intended functionality of the modifications.
🧪 Relevant tests
No
⚡ Possible issues
Possible Bug: The removal of the block parameter in mine_external() and mine_mixed() methods in BlockMiner class might lead to issues if the external block data is not properly managed or is missing in the storage, as these methods now rely entirely on the storage to provide the necessary block data.
Logic Error: The new partitioning logic in partition_transactions() might introduce errors if the transaction kinds are not correctly identified and separated, leading to incorrect mining behavior.
🔒 Security concerns
No
Code feedback:
relevant file
src/eth/block_miner.rs
suggestion
Consider adding error handling for the case where block_number() does not return a valid block number in mine_external_transactions(). This could prevent potential runtime errors or inconsistencies if the block number is missing or invalid. [important]
It might be beneficial to implement logging for successful mining operations or critical steps within the mining functions to aid in debugging and monitoring the mining process. [medium]
To enhance code clarity and maintainability, consider refactoring the mine_external() and mine_mixed() methods to separate the concerns of data retrieval, transaction partitioning, and block construction into distinct methods or structs. [medium]
Ensure that the new helper functions like read_external_block_and_executions() are covered by unit tests to verify their behavior, especially their interaction with the storage system and error handling. [important]
-if not(local_txs.is_empty()) {+if !local_txs.is_empty() {
return log_and_err!("cannot mine external block because one of the transactions is not an external transaction");
}
Add error handling to prevent potential runtime panic.
Add error handling for the case when block_from_external returns an error, to prevent unwrapping on an Err value which could cause a panic.
-if execution.is_success() {- return log_and_err!("cannot mine mixed block because one of the local execution is not a failure");+if !execution.is_success() {+ block.push_execution(tx, execution);
}
Enhancement
Simplify error handling using pattern matching and error propagation.
Use pattern matching to simplify the error handling in read_external_block_and_executions.
if tx.block_number() != block_number {
- return log_and_err!("cannot mine external block because one of the transactions does not belong to the external block");+ return log_and_err!(format!("cannot mine external block because transaction {} does not belong to the external block", tx.hash()));
}
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