feat: adding multi-rollup sequencer for the purpose of testing #18
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Actionable comments posted: 5
🧹 Outside diff range and nitpick comments (6)
test/multi_rollup_sequencer_test.go (5)
12-35: LGTM: Good basic test coverage. Consider adding edge cases.The test function
TestMultiRollupSequencer_SubmitRollupTransactionprovides good coverage for the happy path of submitting a rollup transaction. It checks both the external behavior (no error, non-nil response) and the internal state (transaction added to the correct queue).To improve test coverage, consider adding the following test cases:
- Submitting a transaction with an empty rollup ID
- Submitting a transaction with empty transaction data
- Submitting multiple transactions to the same rollup
- Submitting transactions to different rollups
37-64: LGTM: Good basic test. Consider additional scenarios.The
TestMultiRollupSequencer_GetNextBatchfunction provides a good basic test for retrieving the next batch after submitting a transaction. It correctly verifies that the batch contains the submitted transaction.To enhance the test coverage, consider adding the following scenarios:
- Getting a batch when no transactions have been submitted (should return an empty batch)
- Submitting multiple transactions and verifying they all appear in the batch
- Testing the
MaxBytesparameter by submitting transactions that exceed this limit- Verifying the behavior when
LastBatchHashis provided
66-101: LGTM: Good basic verification test. Consider edge cases.The
TestMultiRollupSequencer_VerifyBatchfunction provides a good test for the happy path of verifying a batch. It correctly submits a transaction, retrieves the batch, computes its hash, and verifies it.To improve the test coverage, consider adding the following scenarios:
- Verifying a batch with an invalid hash (should return false)
- Verifying an empty batch
- Verifying a batch for a non-existent rollup ID
- Verifying a batch after submitting multiple transactions
103-150: LGTM: Good test for multiple rollups. Consider more complex scenarios.The
TestMultiRollupSequencer_MultipleRollupsfunction provides a good test for handling multiple rollups. It correctly verifies that transactions for different rollups are kept separate and can be retrieved independently.To further enhance the test coverage, consider adding the following scenarios:
- Submitting multiple transactions to each rollup and verifying they are correctly batched
- Verifying that getting a batch for one rollup doesn't affect the other rollup's transactions
- Testing with more than two rollups to ensure scalability
- Verifying batch hashes for each rollup to ensure they are computed independently
1-150: Overall: Good test suite with room for improvement.The test file provides a solid foundation for testing the MultiRollupSequencer functionality. The tests are well-structured, easy to understand, and cover the basic operations of the sequencer.
General suggestions for improvement:
- Add more edge cases and error scenarios to each test function.
- Consider adding benchmarks for performance-critical operations.
- Implement table-driven tests for scenarios with multiple similar test cases.
- Add tests for concurrent operations to ensure thread safety.
- Consider using a setup function to reduce code duplication across tests.
These improvements will enhance the robustness and completeness of the test suite.
test/multi_rollup_sequencer.go (1)
121-121: Simplify map initialization by removing the unnecessary capacity argumentWhen initializing the
seenBatchesmap inRollupData, specifying a capacity of zero is unnecessary because the default capacity is already zero. You can simplify the code as follows:- seenBatches: make(map[string]struct{}, 0), + seenBatches: make(map[string]struct{}),This makes the code cleaner without affecting functionality.
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- test/multi_rollup_sequencer_test.go (1 hunks)
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test/multi_rollup_sequencer_test.go (1)
3-10: LGTM: Import statements are appropriate.The import statements are well-organized and include all necessary packages for the test file. The use of the
testify/assertpackage is a good choice for writing clear and concise test assertions.test/multi_rollup_sequencer.go (4)
15-18:MultiRollupSequencerstruct is well-defined and thread-safeThe struct properly includes a map to manage multiple rollups and a read-write mutex to synchronize access to the
rollupsmap. This ensures thread-safe operations when accessing or modifying the rollups data.
21-28:RollupDatastruct effectively manages rollup-specific dataThe struct contains all necessary fields, including the transaction queue, last batch hash with its mutex, and a map of seen batches with its mutex. This design facilitates concurrent access to rollup data while maintaining thread safety.
99-125: Double-checked locking pattern is correctly implementedThe
getOrCreateRollupmethod uses a double-checked locking pattern to ensure that rollups are created safely and efficiently without unnecessary locking. This implementation is thread-safe and avoids race conditions.
128-132:NewMultiRollupSequencerconstructor is correctly implementedThe constructor properly initializes the
MultiRollupSequencerwith an emptyrollupsmap, ready for use. This ensures that the sequencer starts in a clean state.
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- test/dummy.go (1 hunks)
- test/multi_rollup_sequencer.go (1 hunks)
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test/dummy.go (2)
119-119: Improved empty batch checkThe change from
if batch.Transactions == niltoif len(batch.Transactions) == 0is a good improvement. This new condition correctly handles both nil slices and empty slices, making the code more robust and consistent with Go's best practices for checking empty slices.Benefits:
- Improved correctness: Handles both nil and empty slices uniformly.
- Better consistency: Aligns with idiomatic Go code.
- Enhanced robustness: Correctly processes cases where
batch.Transactionsis an initialized but empty slice.
Line range hint
1-165: Overall assessment of changes in test/dummy.goThe modification in the
GetNextBatchmethod of theDummySequencerstruct improves the robustness of empty batch checking. This change is localized and does not affect the overall functionality or structure of theDummySequencer. The rest of the file, including other methods and theTransactionQueueimplementation, remains unchanged.test/multi_rollup_sequencer.go (4)
1-12: LGTM: Package declaration and imports are appropriate.The package declaration and imports are well-organized and relevant to the implemented functionality.
98-125: LGTM: Well-implemented thread-safe lazy initializationThe
getOrCreateRollupmethod correctly implements the double-checked locking pattern for thread-safe lazy initialization ofRollupData. This approach efficiently handles concurrent access to the rollups map while minimizing lock contention.
127-134: LGTM: Proper constructor and interface assertionThe
NewMultiRollupSequencerfunction correctly initializes a newMultiRollupSequencerinstance. The interface assertionvar _ sequencing.Sequencer = &MultiRollupSequencer{}is a good practice, ensuring thatMultiRollupSequencerimplements thesequencing.Sequencerinterface at compile-time.
14-28: 🛠️ Refactor suggestionConsider using
sync.RWMutexforseenBatchesMutexThe
seenBatchesMutexin theRollupDatastruct is currently async.Mutex. Since theVerifyBatchmethod frequently reads fromseenBatches, switching to async.RWMutexwould allow multiple goroutines to read concurrently, potentially improving performance.Consider applying this change:
type RollupData struct { tq *TransactionQueue lastBatchHash []byte lastBatchHashMutex sync.RWMutex seenBatches map[string]struct{} - seenBatchesMutex sync.Mutex + seenBatchesMutex sync.RWMutex }Likely invalid or redundant comment.
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Actionable comments posted: 3
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📒 Files selected for processing (4)
- test/dummy.go (2 hunks)
- test/dummy_test.go (14 hunks)
- test/multi_rollup_sequencer.go (1 hunks)
- test/multi_rollup_sequencer_test.go (1 hunks)
🚧 Files skipped from review as they are similar to previous changes (2)
- test/dummy.go
- test/multi_rollup_sequencer_test.go
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🔇 Additional comments (16)
test/multi_rollup_sequencer.go (4)
14-28: LGTM: Well-structured design for concurrent rollup managementThe
MultiRollupSequencerandRollupDatastructs are well-designed for managing multiple rollups concurrently. The use of separate mutexes for different components allows for fine-grained locking, which can improve performance by reducing contention.
121-128: LGTM: Correct initialization ofMultiRollupSequencerThe
NewMultiRollupSequencerfunction correctly initializes a newMultiRollupSequencerwith an emptyrollupsmap. The use ofmaketo initialize the map is appropriate.
1-128: Overall assessment: Well-implemented with room for optimizationThe
MultiRollupSequencerimplementation is well-structured and correctly handles concurrency for managing multiple rollups. The use of fine-grained locking and the double-checked locking pattern shows attention to performance and thread-safety.Key points:
- The struct designs are appropriate for concurrent rollup management.
- Concurrency is generally well-handled with proper use of mutexes.
- There are opportunities for optimization, particularly in high-concurrency scenarios.
Consider implementing the suggested optimizations to further improve performance and concurrency handling. Additionally, ensure that the
TransactionQueuemethods are thread-safe, as mentioned in a previous comment.
80-94: 🛠️ Refactor suggestionOptimize mutex usage in
VerifyBatchThe
VerifyBatchmethod correctly uses a mutex to protect access to theseenBatchesmap. However, since this operation is read-only, using a read lock instead of a write lock could improve concurrency.Consider changing the mutex to an
RWMutexand usingRLock()instead ofLock():- rollup.seenBatchesMutex.Lock() - defer rollup.seenBatchesMutex.Unlock() + rollup.seenBatchesMutex.RLock() + defer rollup.seenBatchesMutex.RUnlock() key := hex.EncodeToString(req.BatchHash) if _, exists := rollup.seenBatches[key]; exists { return &sequencing.VerifyBatchResponse{Status: true}, nil } return &sequencing.VerifyBatchResponse{Status: false}, nilThis change allows multiple goroutines to verify batches concurrently, potentially improving performance in high-concurrency scenarios.
Likely invalid or redundant comment.
test/dummy_test.go (12)
5-7: LGTM: Import statements updated appropriately.The new imports for "crypto/rand" and "fmt" are correctly added to support the new
GenerateSecureRandomBytesfunction. The reorganization of the "io" import is also appropriate.
20-21: LGTM: Improved test data generation.The use of
GenerateSecureRandomBytes(32)instead of a hardcoded byte slice enhances the test by using random data. The added error handling is appropriate. This change maintains the test's original purpose while improving its robustness.
34-37: LGTM: Enhanced test data generation for multiple transactions.The use of
GenerateSecureRandomBytes(32)for both tx1 and tx2 improves the test by using random data. The added error handling for both function calls is appropriate. These changes maintain the test's original purpose while enhancing its reliability.
55-56: LGTM: Improved transaction data generation in SubmitRollupTransaction test.The use of
GenerateSecureRandomBytes(32)instead of a hardcoded byte slice enhances the test by using random data. The added error handling is appropriate. This change maintains the test's original purpose while improving its robustness.
102-107: LGTM: Enhanced test data generation for multiple transactions.The use of
GenerateSecureRandomBytes(32)for tx1, tx2, and tx3 improves the test by using random data. The added error handling for all three function calls is appropriate. These changes maintain the test's original purpose while enhancing its reliability and coverage.
Line range hint
124-129: LGTM: Improved error handling for SubmitRollupTransaction calls.The updated error handling for the SubmitRollupTransaction calls enhances the test's robustness. This change ensures consistent error checking across multiple transaction submissions, aligning with Go's error handling best practices.
142-143: LGTM: Enhanced transaction data generation and error handling in GetNextBatch test.The use of
GenerateSecureRandomBytes(32)instead of a hardcoded byte slice improves the test by using random data. The added error handling for both the random byte generation and SubmitRollupTransaction call is appropriate. These changes maintain the test's original purpose while improving its robustness and reliability.Also applies to: 149-150
192-193: LGTM: Improved transaction data generation and error handling in LastBatchHashMismatch test.The changes enhance the test in several ways:
- Use of
GenerateSecureRandomBytes(32)improves randomness of test data.- Added error handling for both random byte generation and SubmitRollupTransaction increases robustness.
- The updated error assertion message ("nil mismatch") is more specific and informative.
These improvements maintain the test's original purpose while increasing its reliability and clarity.
Also applies to: 198-199, 210-210
218-223: LGTM: Enhanced transaction data generation and error handling in MaxBytesLimit test.The changes improve the test in multiple ways:
- Use of
GenerateSecureRandomBytes(32)for tx1, tx2, and tx3 enhances randomness of test data.- Added error handling for both random byte generation and SubmitRollupTransaction calls increases robustness.
These improvements maintain the test's original purpose of verifying the MaxBytes limit functionality while increasing its reliability and coverage.
Also applies to: 239-244
285-286: LGTM: Improved transaction data generation and error handling in VerifyBatch test.The changes enhance the test in the following ways:
- Use of
GenerateSecureRandomBytes(32)improves randomness of test data.- Added error handling for both random byte generation and SubmitRollupTransaction increases robustness.
These improvements maintain the test's original purpose of verifying a batch while increasing its reliability.
Also applies to: 291-292
339-342: LGTM: Significant improvements in test data generation and addition of secure random bytes function.The changes enhance the codebase in several ways:
In TestDummySequencer_VerifyBatchWithMultipleTransactions:
- Use of
GenerateSecureRandomBytes(32)for tx1 and tx2 improves randomness of test data.- Added error handling for both random byte generation and SubmitRollupTransaction calls increases robustness.
Addition of GenerateSecureRandomBytes function:
- Implements secure random number generation using crypto/rand.
- Includes proper input validation and error handling.
- Enhances the overall security and reliability of the test suite.
These improvements significantly increase the quality and security of the test suite while maintaining the original test purposes.
Also applies to: 354-357, 397-408
Line range hint
1-408: Overall assessment: Significant improvements to test suite robustness and security.The changes made to
test/dummy_test.goconsistently enhance the quality of the test suite:
- Replacement of hardcoded byte slices with securely generated random data across all tests.
- Consistent implementation of error handling for new random data generation and existing function calls.
- Addition of a well-implemented
GenerateSecureRandomBytesfunction, improving the overall security of the test data generation.These modifications collectively increase the reliability, coverage, and security of the test suite while maintaining the original test purposes. The changes align well with best practices in Go testing and secure coding standards.
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (3)
test/dummy_test.go (3)
102-107: LGTM: Consistent use of secure random bytes for multiple transactions.The test function now uses
GenerateSecureRandomBytes(32)for generating all transaction data, maintaining consistency with other test functions. Proper error handling is implemented for all transactions.Consider using separate error variables for each
SubmitRollupTransactioncall to improve error traceability:_, err1 := sequencer.SubmitRollupTransaction(context.Background(), req1) assert.NoError(t, err1) _, err2 := sequencer.SubmitRollupTransaction(context.Background(), req2) assert.NoError(t, err2) _, err3 := sequencer.SubmitRollupTransaction(context.Background(), req3) assert.NoError(t, err3)This change would make it easier to identify which specific transaction submission failed if an error occurs.
Also applies to: 124-129
218-223: LGTM: Consistent use of secure random bytes for multiple transactions in MaxBytesLimit test.The test function now uses
GenerateSecureRandomBytes(32)for generating all transaction data, maintaining consistency with other test functions. Proper error handling is implemented for all transactions.Consider using separate error variables for each
SubmitRollupTransactioncall to improve error traceability, similar to the suggestion made earlier:_, err1 := sequencer.SubmitRollupTransaction(context.Background(), req1) assert.NoError(t, err1) _, err2 := sequencer.SubmitRollupTransaction(context.Background(), req2) assert.NoError(t, err2) _, err3 := sequencer.SubmitRollupTransaction(context.Background(), req3) assert.NoError(t, err3)This change would make it easier to identify which specific transaction submission failed if an error occurs.
Also applies to: 239-244
397-408: LGTM: Well-implemented secure random byte generation function.The
GenerateSecureRandomBytesfunction is a great addition that enhances the security and randomness of test data throughout the file. It usescrypto/randfor cryptographically secure random number generation and includes proper input validation and error handling.Consider using
errors.Newinstead offmt.Errorffor the first error case, as it doesn't require formatting:if length <= 0 { return nil, errors.New("length must be greater than 0") }This change would slightly improve performance and readability.
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📒 Files selected for processing (4)
- test/dummy.go (2 hunks)
- test/dummy_test.go (14 hunks)
- test/multi_rollup_sequencer.go (1 hunks)
- test/multi_rollup_sequencer_test.go (1 hunks)
🚧 Files skipped from review as they are similar to previous changes (2)
- test/dummy.go
- test/multi_rollup_sequencer_test.go
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📓 Learnings (2)
📓 Common learnings
Learnt from: gupadhyaya PR: rollkit/go-sequencing#18 File: test/multi_rollup_sequencer.go:30-38 Timestamp: 2024-10-17T06:12:48.558Z Learning: In `MultiRollupSequencer` within `test/multi_rollup_sequencer.go`, the `AddTransaction` method of `TransactionQueue` handles mutex locking internally, so additional mutex protection in `SubmitRollupTransaction` is unnecessary.test/multi_rollup_sequencer.go (1)
Learnt from: gupadhyaya PR: rollkit/go-sequencing#18 File: test/multi_rollup_sequencer.go:30-38 Timestamp: 2024-10-17T06:12:48.558Z Learning: In `MultiRollupSequencer` within `test/multi_rollup_sequencer.go`, the `AddTransaction` method of `TransactionQueue` handles mutex locking internally, so additional mutex protection in `SubmitRollupTransaction` is unnecessary.
🔇 Additional comments (13)
test/multi_rollup_sequencer.go (7)
1-12: LGTM: Package declaration and imports look goodThe package declaration and imports are appropriate for the file's purpose. The use of the
testpackage indicates this is for testing purposes, which aligns with the MultiRollupSequencer's intended use.
14-18: LGTM: MultiRollupSequencer struct is well-definedThe
MultiRollupSequencerstruct is well-designed for managing multiple rollups. The use of async.RWMutexfor therollupsmap is a good practice for ensuring thread-safe access in a concurrent environment.
20-28: LGTM: RollupData struct is well-structuredThe
RollupDatastruct is well-designed to hold rollup-specific data. The use of separate mutexes forlastBatchHashandseenBatchesallows for fine-grained locking, which can improve performance in concurrent scenarios.
30-38: LGTM: SubmitRollupTransaction method is correctly implementedThe
SubmitRollupTransactionmethod is concise and correct. It properly retrieves or creates a rollup before adding the transaction to the queue. As per the learning note, theAddTransactionmethod handles mutex locking internally, so no additional synchronization is needed here.
119-124: LGTM: NewMultiRollupSequencer constructor is correctly implementedThe
NewMultiRollupSequencerconstructor is simple and correct. It properly initializes therollupsmap, ensuring that theMultiRollupSequenceris ready for use immediately after creation.
126-126: LGTM: Interface compliance check is a good practiceThe use of
var _ sequencing.Sequencer = &MultiRollupSequencer{}is an excellent practice. It ensures at compile-time thatMultiRollupSequencercorrectly implements thesequencing.Sequencerinterface, preventing potential runtime errors.
78-92: 🛠️ Refactor suggestionOptimize mutex usage in VerifyBatch
The
VerifyBatchmethod is correct, but we can optimize it by using a read lock instead of a write lock when checking for seen batches.Consider changing the mutex usage as follows:
-rollup.seenBatchesMutex.Lock() -defer rollup.seenBatchesMutex.Unlock() +rollup.seenBatchesMutex.RLock() +defer rollup.seenBatchesMutex.RUnlock() key := hex.EncodeToString(req.BatchHash) if _, exists := rollup.seenBatches[key]; exists { return &sequencing.VerifyBatchResponse{Status: true}, nil } return &sequencing.VerifyBatchResponse{Status: false}, nilThis change allows multiple goroutines to read from
seenBatchesconcurrently, potentially improving performance in high-concurrency scenarios.Likely invalid or redundant comment.
test/dummy_test.go (6)
5-7: LGTM: New imports added for secure random byte generation.The new imports are correctly added to support the
GenerateSecureRandomBytesfunction.
20-21: LGTM: Improved test data generation with secure random bytes.The use of
GenerateSecureRandomBytes(32)enhances the security and randomness of the test data. Proper error handling is also implemented.
34-37: LGTM: Consistent use of secure random bytes for test data.The changes maintain consistency with the previous test function, using
GenerateSecureRandomBytes(32)for bothtx1andtx2. Proper error handling is implemented for both transactions.
55-56: LGTM: Consistent use of secure random bytes for transaction data.The test function now uses
GenerateSecureRandomBytes(32)for generating the transaction data, maintaining consistency with other test functions. Proper error handling is also implemented.
142-143: LGTM: Consistent use of secure random bytes for transaction data.The test function now uses
GenerateSecureRandomBytes(32)for generating the transaction data, maintaining consistency with other test functions. Proper error handling is also implemented.Also applies to: 149-150
Line range hint
1-408: Overall LGTM: Significant improvements in test data security and randomness.The changes made to this file greatly enhance the security and randomness of test data by introducing the
GenerateSecureRandomBytesfunction and using it consistently throughout the test cases. This improvement helps ensure that the tests are more robust and less likely to have hidden dependencies on specific data values.Key improvements:
- Consistent use of secure random bytes for all test transactions.
- Proper error handling for random byte generation.
- Well-implemented
GenerateSecureRandomBytesfunction following best practices.Minor suggestions have been made for further improvements in error handling and variable naming, but these are not critical and can be addressed at the developer's discretion.
Great job on enhancing the overall quality and security of the test suite!
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Summary by CodeRabbit
New Features
MultiRollupSequencerfor managing multiple rollups and transaction processing.DummySequencerfor better debugging and accurate identification of empty transaction batches.Tests
MultiRollupSequencer, validating transaction submission, batch retrieval, and verification across multiple rollups.