OIMF: Simplify interface for GetDeltaOpenInterestFromUpdates
#1227
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WalkthroughThe update involves refactoring the functionality related to calculating the delta of open interest from perpetual match updates into a more generic approach that can handle various update types. This is achieved by renaming and repurposing Changes
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Review Status
Actionable comments generated: 0
Configuration used: CodeRabbit UI
Files selected for processing (3)
- protocol/x/subaccounts/keeper/oimf.go (4 hunks)
- protocol/x/subaccounts/keeper/oimf_test.go (13 hunks)
- protocol/x/subaccounts/keeper/subaccount.go (1 hunks)
Additional comments: 8
protocol/x/subaccounts/keeper/oimf.go (4)
- 47-52: The function
GetDeltaOpenInterestFromUpdatesnow handles various update types, specifically returningnilfor non-Matchupdates. This change simplifies the handling of updates by centralizing the logic for determining the delta open interest based on the update type. However, it's important to ensure that all callers of this function are aware of this behavior and handle thenilreturn value appropriately to avoid potentialnildereferences.- 56-58: The check for
updateType != types.Matchreturningnildirectly is a clear and concise way to filter out non-relevant update types for this function. This approach keeps the function focused on its intended purpose and simplifies the logic for handling different types of updates.- 85-94: > 📝 NOTE
This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [59-91]
The validation logic within
GetDeltaOpenInterestFromUpdatesfor ensuring the correct number of updates and the consistency of perpetual IDs across updates is robust and thorough. It correctly panics on invalid input, which is appropriate given that these conditions represent programming errors that should be caught during development rather than at runtime in a production environment. However, it's crucial to ensure that these panic conditions are well-documented in the function's comments so that callers are aware of the potential for panics and can design their code accordingly to avoid these scenarios.
- 102-118: The logic for calculating the base quantums delta and constructing the
OpenInterestDeltareturn value is clear and logically sound. It correctly aggregates the delta long from each settled update and constructs the return value based on the aggregated result. This approach is efficient and minimizes the complexity of the calculation. However, it's important to ensure that the function's documentation clearly explains the expected format and contents of thesettledUpdatesparameter, especially regarding the structure and meaning of thePerpetualUpdateswithin eachSettledUpdate, to aid future maintainers or users of this function.protocol/x/subaccounts/keeper/oimf_test.go (3)
- 24-29: The renaming of the test function to
TestGetDeltaOpenInterestFromUpdatesand the inclusion of anupdateTypefield in the test cases are appropriate changes that align with the modifications made to theGetDeltaOpenInterestFromUpdatesfunction. This ensures that the tests accurately reflect the new functionality and are capable of covering the different scenarios that the function is expected to handle. It's important to ensure comprehensive test coverage, especially for the new logic paths introduced by handling different update types.- 175-187: > 📝 NOTE
This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [32-220]
The test cases have been well-structured to cover a variety of scenarios, including invalid configurations and valid updates with different outcomes. This thorough testing approach is commendable as it ensures that the
GetDeltaOpenInterestFromUpdatesfunction behaves as expected across a wide range of inputs. However, it's crucial to also include test cases that specifically target the edge cases introduced by the new logic, such as handling updates of types other thanMatchand ensuring that the function returnsnilas expected in those cases. Adding these test cases will further strengthen the test suite and ensure that all aspects of the function's behavior are adequately covered.
- 367-383: The use of
require.PanicsWithValueandrequire.Equalto validate the behavior ofGetDeltaOpenInterestFromUpdatesin both panic and non-panic scenarios is a good practice. It ensures that the function's error handling and return values are as expected. However, it's important to ensure that the error messages and return values used in these assertions accurately reflect the function's implementation to avoid false negatives in the test results. Additionally, consider adding comments to the test cases to explain the rationale behind each scenario, especially for the more complex or less intuitive cases, to aid future maintainers.protocol/x/subaccounts/keeper/subaccount.go (1)
- 645-648: Extracting the logic for calculating
perpOpenInterestDeltato theGetDeltaOpenInterestFromUpdatesfunction is a significant improvement in terms of code modularity and readability. This change not only simplifies theinternalCanUpdateSubaccountsfunction but also centralizes the logic related to open interest delta calculation, making it easier to maintain and understand. It's important to ensure that the integration between these functions is thoroughly tested, especially to verify that theGetDeltaOpenInterestFromUpdatesfunction is correctly handling all update types and scenarios as expected.
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Review Status
Actionable comments generated: 0
Configuration used: CodeRabbit UI
Files selected for processing (1)
- protocol/x/subaccounts/keeper/oimf.go (4 hunks)
Additional comments: 3
protocol/x/subaccounts/keeper/oimf.go (3)
- 47-53: The changes from lines 47 to 53 introduce a new function signature for
GetDeltaOpenInterestFromUpdates, which now returns a*perptypes.OpenInterestDeltaand takessettledUpdatesandupdateTypeas parameters. This refactoring aims to simplify the interface and improve the function's capability to handle various types of updates.While the function signature and the initial checks (lines 57-59 and 60-92) are clear and align with the PR objectives, it's important to ensure that the documentation comments (lines 47-53) accurately describe the behavior of the function, especially regarding how it handles different update types. The comment mentions that for
Matchupdates, it returns a structOpenInterestDeltaor nil if the OI delta is zero, and panics if the update format is invalid. For other update types, it returns nil. This is a significant change from the previous implementation and should be clearly documented to avoid confusion.Consider expanding the documentation to include examples of different update types and how they are handled by the function. This will provide clearer guidance for future developers and maintainers.
- 86-95: > 📝 NOTE
This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [60-92]
The changes from lines 60 to 92 implement the logic to handle
Matchupdates by checking the number ofsettledUpdatesand theirPerpetualUpdates. The function panics with specific error messages if the updates do not meet the expected criteria (e.g., must have two updates, must update one perpetual, must be the same perpetual ID).This approach ensures that the function operates on well-defined inputs, reducing the risk of unexpected behavior. However, the use of
panicfor error handling in this context might be too aggressive, especially if this function is called frequently or in scenarios where a non-terminating error handling strategy would be preferable.Evaluate the impact of using
panicfor error handling in this context. Consider whether returning an error would be more appropriate, allowing the caller to decide how to handle these conditions. This could improve the robustness and flexibility of the error handling strategy.
- 103-119: The changes from lines 103 to 119 implement the core logic of the
GetDeltaOpenInterestFromUpdatesfunction, calculating thebaseQuantumsDeltafrom thesettledUpdatesand returning anOpenInterestDeltastruct if the delta is non-zero.This implementation is concise and leverages the
getDeltaLongFromSettledUpdatehelper function to compute the delta long for each update. The use ofbig.Intfor arithmetic operations ensures accuracy for large numbers, which is crucial in financial calculations.However, there's an opportunity to improve the readability and efficiency of this code segment. Specifically, the loop (lines 103-109) iterates over
settledUpdatesto accumulatebaseQuantumsDelta, which is straightforward but could benefit from a more descriptive comment explaining the rationale behind this calculation, especially for developers unfamiliar with the domain.Consider adding a comment above the loop (lines 103-109) explaining the purpose of accumulating
baseQuantumsDeltafrom thesettledUpdates. This will enhance the readability and maintainability of the code.
Changelist
Simply
GetDeltaOpenInterestFromUpdatesinterface as well as upstream usageTest Plan
unit tests
Author/Reviewer Checklist
state-breakinglabel.indexer-postgres-breakinglabel.PrepareProposalorProcessProposal, manually add the labelproposal-breaking.feature:[feature-name].backport/[branch-name].refactor,chore,bug.