fix: edge case namespace merkle tree #277
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WalkthroughThe modifications involve a refinement in the logic for node calculation within the Changes
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Review Status
Actionable comments generated: 1
Configuration used: CodeRabbit UI
Files selected for processing (2)
- src/lib/tree/namespace/NamespaceMerkleTree.sol (2 hunks)
- src/lib/tree/namespace/test/NamespaceMerkleTree.t.sol (4 hunks)
Additional comments: 17
src/lib/tree/namespace/NamespaceMerkleTree.sol (2)
109-109: The change in the condition within the
ifstatement from(1 << (height - heightOffset - 1))to(1 << (height - 1))is intended to correct the edge case identified by Ottersec. Ensure that this change does not introduce any off-by-one errors or other unintended consequences in the calculation of the subtree index.122-122: The adjustment of the proof's sideNodes length check from
(proof.sideNodes.length <= height - 1)to(proof.sideNodes.length <= height - heightOffset - 1)is critical for the integrity of the proof verification. It is important to validate that this change correctly handles the edge case without affecting other valid proofs.src/lib/tree/namespace/test/NamespaceMerkleTree.t.sol (15)
256-285: The test function
testVerifyLeafFiveOfEightis well-structured and follows the pattern of the other test functions. It's testing the verification of a specific leaf in a merkle tree with eight leaves. Ensure that the test cases cover all possible edge cases and that the test data used is representative of real-world scenarios to ensure thorough testing.287-318: The test function
testVerifyLeafFourOfEightis similar to the previous one, testing another leaf's verification in the same merkle tree. It's important to check that the test data changes accordingly and that the assertions are correct for the specific case being tested.320-351: The test function
testVerifyLeafThreeOfEightis consistent with the other test functions in structure and purpose. It's crucial that the test functions are not only correct but also meaningful. The test should fail if the expected behavior is not met, which is a critical aspect of test-driven development.353-382: The test function
testVerifyLeafFiveOfSevenintroduces a different number of leaves in the merkle tree, which is good for testing different scenarios. It's important to ensure that the test functions are independent and can be run in any order without affecting each other.384-408: The test function
testVerifyLeafNineOfTenis testing a larger merkle tree with ten leaves. This is a good practice to test the scalability of the verification function. It's also important to ensure that the test functions are efficient and do not take an excessive amount of time to run, especially when dealing with larger data sets.410-444: The test function
testVerifyLeafTwelveOfThirteenis testing an even larger merkle tree. It's important to note that as the number of leaves increases, the complexity of the merkle tree also increases. The tests should be designed to catch any potential issues that could arise from this increased complexity.446-470: The test function
testVerifyLeafThirteenOfThirteenis testing the verification of the last leaf in a merkle tree with thirteen leaves. This is a boundary case and is important for ensuring the correctness of the merkle tree implementation at its limits.472-496: The test function
testVerifyInternalNodeOneAndTwoOfFouris testing the verification of internal nodes, which is a critical part of ensuring the integrity of the merkle tree. It's important to ensure that the internal node verification is as robust as the leaf verification.498-519: The test function
testVerifyInternalNodeOneAndTwoOfThreeis another test for internal node verification, this time with a different number of leaves. This variation in test cases helps ensure that the verification function works correctly under different scenarios.520-520: The test function
testVerifyInnerLeafIsRootis testing a special case where the leaf itself is the root of the merkle tree. This is an edge case and it's good to see it being tested explicitly.520-520: The test function
testVerifyInnerFalseForStartingHeightZerois testing the behavior of the verification function when the starting height is zero. This is an important negative test case to ensure that the function handles incorrect inputs gracefully.253-523: > Note: This review was outside the patches, so it was mapped to the patch with the greatest overlap. Original lines [520-561]
The test function
testVerifyInnerFalseForTooLargeKeyis testing the behavior when the key is larger than the number of leaves. This is another negative test case that is important for ensuring the function's robustness against invalid inputs.
- 558-564: > Note: This review was outside the patches, so it was mapped to the patch with the greatest overlap. Original lines [520-581]
The test function
testVerifyInnerFalseForIncorrectProofLengthis testing the verification function's behavior when the proof length is incorrect. This is a critical test for ensuring that the function does not accept invalid proofs.
520-520: The test function
testVerifyInnerOneOfEightis testing the verification of an internal node in a merkle tree with eight leaves. This is a good test for ensuring that the verification function works correctly for internal nodes as well as leaves.520-520: The test function
testVerifyInnerSevenOfEightis similar to the previous test but for a different internal node. It's important to test all internal nodes, especially in larger merkle trees, to ensure complete coverage.
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Review Status
Actionable comments generated: 0
Configuration used: CodeRabbit UI
Files selected for processing (1)
- src/lib/tree/namespace/test/NamespaceMerkleTree.t.sol (3 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/lib/tree/namespace/test/NamespaceMerkleTree.t.sol
| @@ -252,6 +252,271 @@ contract NamespaceMerkleTreeTest is DSTest { | |||
| assertTrue(isValid); | |||
| } | |||
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| function testVerifyLeafFiveOfEight() external { | |||
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as you said we should figure out these tests are needed and document why they are needed so when they fail in the future we can better fix things
so we should create an issue imo to do so later, as I'm not sure we want to block on it due to the time constraints
Overview
This fixes an edge case with the
verifyInnerfor the NMT implementation. It is the fix forOS-CLST-ADV-01from the Ottersec audit.Special thanks for Ottersec on providing the test cases and the fix.
Checklist
Summary by CodeRabbit
Refactor
Tests