blobToSharesV0 #327
blobToSharesV0 #327
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v1.8.2
WalkthroughThe recent updates enhance configuration capabilities by adding file system permissions in Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant Commitment
participant NamespaceHandler
User->>Commitment: Call bytesToSharesV0(blobData, namespace)
Commitment->>NamespaceHandler: Check if reserved namespace
NamespaceHandler-->>Commitment: Return validation result
Commitment->>Commitment: Allocate shares and write metadata
Commitment-->>User: Return shares and error flag
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Actionable comments posted: 1
Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (4)
- foundry.toml (1 hunks)
- src/lib/commitment/Commitment.sol (1 hunks)
- src/lib/commitment/test/Commitment.t.sol (1 hunks)
- src/lib/tree/Types.sol (1 hunks)
Additional comments not posted (11)
foundry.toml (1)
5-5: LGTM! Verify the necessity of the added permission.The addition of
fs_permissionslooks good. Ensure that the read access to the current directory is necessary for the application's operations.src/lib/tree/Types.sol (1)
31-35: LGTM! Verify the boundary values and function usage.The
isReservedNamespacefunction appears to be correctly implemented. Ensure that the boundary valuesupperandlowerare accurate and that the function is used correctly in the codebase.Verification successful
LGTM! The
isReservedNamespacefunction and its boundary values are correctly implemented and used in the codebase.
- The function is used in
src/lib/commitment/Commitment.sol.- The boundary values
upperandlowerare accurately defined insrc/lib/tree/Types.sol.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `isReservedNamespace` and the accuracy of boundary values. # Test: Search for the function usage. Expect: Correct usage of the function. rg --type solidity -A 5 $'isReservedNamespace' # Test: Ensure boundary values are accurate. Expect: No discrepancies in the values. rg --type solidity -A 5 $'hex"00000000000000000000000000000000000000000000000000000000FF"' rg --type solidity -A 5 $'hex"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00"'Length of output: 328
Script:
#!/bin/bash # Description: Verify the usage of `isReservedNamespace` and the accuracy of boundary values. # Find all Solidity files fd -e sol > solidity_files.txt # Test: Search for the function usage. Expect: Correct usage of the function. xargs -a solidity_files.txt rg -A 5 'isReservedNamespace' # Test: Ensure boundary values are accurate. Expect: No discrepancies in the values. xargs -a solidity_files.txt rg -A 5 'hex"00000000000000000000000000000000000000000000000000000000FF"' xargs -a solidity_files.txt rg -A 5 'hex"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00"'Length of output: 2430
src/lib/commitment/test/Commitment.t.sol (1)
1-67: LGTM! Verify the correctness of the test vectors.The test file
Commitment.t.sollooks good and thoroughly tests thebytesToSharesV0function. Ensure that the test vectors intestVectors.jsonare correct and comprehensive.src/lib/commitment/Commitment.sol (8)
10-19: LGTM!The
reversefunction correctly converts a little-endian uint32 to big-endian using bitwise operations.
21-23: LGTM!The
div_ceilfunction correctly performs ceiling division of two uint256 numbers.
25-27: LGTM!The
num_sharesfunction correctly calculates the number of shares needed for a given blob size using ceiling division and a minimum blob size of 478 bytes.
29-33: LGTM!The
copyNamespacefunction correctly copies namespace bytes into a share using a for loop.
35-37: LGTM!The
writeInfoByteV0function correctly writes the info byte at index 29 of the share based on thestartingSequenceflag.
39-47: LGTM!The
writeSequenceLengthfunction correctly writes the sequence length as a big-endian 4-byte value at indices 30-33 of the share.
49-62: LGTM!The
copyBytesfunction correctly copies data bytes into a buffer starting from the end and pads the remaining buffer with zeros if the data is exhausted.
64-77: LGTM!The
bytesToHexStringfunction correctly converts a byte array to a hexadecimal string using a fixed buffer size and a lookup table for hexadecimal digits.
src/lib/commitment/Commitment.sol
Outdated
| // Share Version 0 | ||
| function bytesToSharesV0(bytes memory blobData, Namespace memory namespace) pure returns (bytes[] memory shares, bool err) { | ||
| if (namespace.version != 0) { | ||
| return (new bytes[](0), true); | ||
| } | ||
| if (isReservedNamespace(namespace)) { | ||
| return (new bytes[](0), true); | ||
| } | ||
| // Allocate memory for the shares | ||
| uint256 numShares = num_shares(blobData.length); | ||
| bytes[] memory _shares = new bytes[](numShares); | ||
| for (uint256 i = 0; i < _shares.length; i++) { | ||
| _shares[i] = new bytes(512); | ||
| } | ||
| // Get the namespace bytes | ||
| bytes29 namespaceBytes = namespace.toBytes(); | ||
|
|
||
| // The first share is special, because it has startingSequence set to true and the 4-byte sequence length | ||
| copyNamespace(_shares[0], namespaceBytes); | ||
| writeInfoByteV0(_shares[0], true); | ||
| writeSequenceLength(_shares[0], uint32(blobData.length)); | ||
| uint32 cursor = 0; | ||
| cursor = copyBytes(_shares[0], cursor, blobData, uint32(478)); //only 478 bytes, because 4 bytes are used for the sequence length | ||
|
|
||
| if (shares.length != 1) { | ||
| // The remaining shares are all the same | ||
| for (uint256 i = 1; i < _shares.length; i++) { | ||
| // Copy the namespace | ||
| copyNamespace(_shares[i], namespaceBytes); | ||
| // Write the info byte | ||
| writeInfoByteV0(_shares[i], false); | ||
| // Copy the data | ||
| cursor = copyBytes(_shares[i], cursor, blobData, uint32(482)); // copy the full 482 bytes | ||
| } | ||
| } | ||
|
|
||
| shares = _shares; | ||
| err = false; | ||
| } |
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Handle the case where blobData is empty.
The bytesToSharesV0 function does not handle the case where blobData is empty. This could lead to unexpected behavior or errors.
+ if (blobData.length == 0) {
+ return (new bytes[](0), true);
+ }Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| // Share Version 0 | |
| function bytesToSharesV0(bytes memory blobData, Namespace memory namespace) pure returns (bytes[] memory shares, bool err) { | |
| if (namespace.version != 0) { | |
| return (new bytes[](0), true); | |
| } | |
| if (isReservedNamespace(namespace)) { | |
| return (new bytes[](0), true); | |
| } | |
| // Allocate memory for the shares | |
| uint256 numShares = num_shares(blobData.length); | |
| bytes[] memory _shares = new bytes[](numShares); | |
| for (uint256 i = 0; i < _shares.length; i++) { | |
| _shares[i] = new bytes(512); | |
| } | |
| // Get the namespace bytes | |
| bytes29 namespaceBytes = namespace.toBytes(); | |
| // The first share is special, because it has startingSequence set to true and the 4-byte sequence length | |
| copyNamespace(_shares[0], namespaceBytes); | |
| writeInfoByteV0(_shares[0], true); | |
| writeSequenceLength(_shares[0], uint32(blobData.length)); | |
| uint32 cursor = 0; | |
| cursor = copyBytes(_shares[0], cursor, blobData, uint32(478)); //only 478 bytes, because 4 bytes are used for the sequence length | |
| if (shares.length != 1) { | |
| // The remaining shares are all the same | |
| for (uint256 i = 1; i < _shares.length; i++) { | |
| // Copy the namespace | |
| copyNamespace(_shares[i], namespaceBytes); | |
| // Write the info byte | |
| writeInfoByteV0(_shares[i], false); | |
| // Copy the data | |
| cursor = copyBytes(_shares[i], cursor, blobData, uint32(482)); // copy the full 482 bytes | |
| } | |
| } | |
| shares = _shares; | |
| err = false; | |
| } | |
| // Share Version 0 | |
| function bytesToSharesV0(bytes memory blobData, Namespace memory namespace) pure returns (bytes[] memory shares, bool err) { | |
| if (namespace.version != 0) { | |
| return (new bytes[](0), true); | |
| } | |
| if (isReservedNamespace(namespace)) { | |
| return (new bytes[](0), true); | |
| } | |
| if (blobData.length == 0) { | |
| return (new bytes[](0), true); | |
| } | |
| // Allocate memory for the shares | |
| uint256 numShares = num_shares(blobData.length); | |
| bytes[] memory _shares = new bytes[](numShares); | |
| for (uint256 i = 0; i < _shares.length; i++) { | |
| _shares[i] = new bytes(512); | |
| } | |
| // Get the namespace bytes | |
| bytes29 namespaceBytes = namespace.toBytes(); | |
| // The first share is special, because it has startingSequence set to true and the 4-byte sequence length | |
| copyNamespace(_shares[0], namespaceBytes); | |
| writeInfoByteV0(_shares[0], true); | |
| writeSequenceLength(_shares[0], uint32(blobData.length)); | |
| uint32 cursor = 0; | |
| cursor = copyBytes(_shares[0], cursor, blobData, uint32(478)); //only 478 bytes, because 4 bytes are used for the sequence length | |
| if (shares.length != 1) { | |
| // The remaining shares are all the same | |
| for (uint256 i = 1; i < _shares.length; i++) { | |
| // Copy the namespace | |
| copyNamespace(_shares[i], namespaceBytes); | |
| // Write the info byte | |
| writeInfoByteV0(_shares[i], false); | |
| // Copy the data | |
| cursor = copyBytes(_shares[i], cursor, blobData, uint32(482)); // copy the full 482 bytes | |
| } | |
| } | |
| shares = _shares; | |
| err = false; | |
| } |
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Actionable comments posted: 0
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Review profile: CHILL
Files selected for processing (1)
- src/lib/commitment/Commitment.sol (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/lib/commitment/Commitment.sol
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Files selected for processing (1)
- src/lib/commitment/Commitment.sol (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/lib/commitment/Commitment.sol
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Actionable comments posted: 0
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Files selected for processing (2)
- lib/ds-test (1 hunks)
- src/lib/commitment/Commitment.sol (1 hunks)
Files skipped from review due to trivial changes (1)
- lib/ds-test
Files skipped from review as they are similar to previous changes (1)
- src/lib/commitment/Commitment.sol
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Actionable comments posted: 1
Review details
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Review profile: CHILL
Files selected for processing (2)
- src/lib/commitment/Commitment.sol (1 hunks)
- src/lib/commitment/test/Commitment.t.sol (1 hunks)
Additional comments not posted (13)
src/lib/commitment/test/Commitment.t.sol (4)
18-29: LGTM!The
fromHexCharfunction correctly converts a hexadecimal character to its integer value and handles invalid inputs appropriately.
31-39: LGTM!The
fromHexfunction correctly converts a hexadecimal string to a byte array, ensuring the string length is even.
41-43: LGTM!The
compareStringsfunction efficiently compares two strings using keccak256 hashing.
45-65: LGTM!The
testBytesToSharesV0function thoroughly tests the_bytesToSharesV0function using test vectors, ensuring correctness.src/lib/commitment/Commitment.sol (9)
10-12: LGTM!The
_divCeilfunction correctly performs division with ceiling rounding.
14-16: LGTM!The
_numSharesfunction correctly calculates the number of shares needed for a given blob size.
18-22: LGTM!The
_copyNamespacefunction correctly copies namespace bytes into a share.
24-26: LGTM!The
_writeInfoByteV0function correctly writes the info byte for the starting sequence.
28-36: LGTM!The
_writeSequenceLengthfunction correctly writes a 4-byte sequence length to a share.
38-51: LGTM!The
_copyBytesfunction correctly copies data into a buffer and pads with zeros if necessary.
53-66: LGTM!The
_bytesToHexStringfunction correctly converts a byte array to a hexadecimal string.
68-106: LGTM!The
_bytesToSharesV0function correctly converts blob data to V0 shares, handling namespaces and sequence lengths appropriately.
108-114: LGTM!The
_roundDownPowerOfTwofunction correctly rounds down to the nearest power of two.
src/lib/commitment/Commitment.sol
Outdated
| function _createCommitment(bytes[] memory shares) pure returns (bytes32 commitment) { | ||
| uint256 subtreeWidth = _subtreeWidth(shares.length, SUBTREE_ROOT_THRESHOLD); | ||
| uint256[] treeSizes = _merkleMountainRangeSizes(shares.length, subtreeWidth); | ||
| bytes[][][] leafSets = new bytes[][][](treeSizes.length); | ||
| uint256 cursor = 0; | ||
| for (uint256 i = 0; i < treeSizes.length; i++) { | ||
| leafSets[i] = new bytes[][](treeSizes[i]); | ||
|
|
||
| } |
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Complete the _createCommitment function.
The function is incomplete and does not currently return a commitment. Ensure the implementation is completed to fulfill its intended purpose.
Would you like assistance in completing the _createCommitment function or opening a GitHub issue to track this task?
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Files selected for processing (3)
- src/lib/commitment/Commitment.sol (1 hunks)
- src/lib/tree/namespace/NamespaceMerkleMultiproof.sol (1 hunks)
- src/lib/tree/namespace/NamespaceMerkleTree.sol (2 hunks)
Files skipped from review due to trivial changes (1)
- src/lib/tree/namespace/NamespaceMerkleMultiproof.sol
Files skipped from review as they are similar to previous changes (1)
- src/lib/commitment/Commitment.sol
Additional comments not posted (1)
src/lib/tree/namespace/NamespaceMerkleTree.sol (1)
Line range hint
196-215:
Consider the implications of changing function visibility topublic.Changing the visibility of
computeNMTRootfromprivatetopublicexposes it to external calls. Ensure that this change is intentional and that all inputs are validated to prevent misuse. Review any security implications and verify that exposing this function aligns with the architectural goals.
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Actionable comments posted: 1
Outside diff range, codebase verification and nitpick comments (3)
src/lib/commitment/test/Commitment.t.sol (3)
18-29: Improve the error message in revert.The function
fromHexCharhas a revert statement with a generic error message. Consider providing a more descriptive message to aid debugging.- revert("fail"); + revert("Invalid hex character");
31-39: Enhance error message in require statement.The
fromHexfunction's require statement lacks a detailed error message. Providing more context can help with debugging.- require(ss.length%2 == 0); // length must be even + require(ss.length%2 == 0, "Hex string length must be even");
45-65: Consider adding comments for clarity.The
testBytesToSharesV0function is well-structured. Adding comments to explain key steps can improve readability and maintainability.// Example comment // Load test vectors from JSON file
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Files selected for processing (3)
- src/lib/commitment/Commitment.sol (1 hunks)
- src/lib/commitment/test/Commitment.t.sol (1 hunks)
- src/lib/tree/binary/BinaryMerkleTree.sol (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/lib/commitment/Commitment.sol
Additional comments not posted (4)
src/lib/commitment/test/Commitment.t.sol (3)
41-43: String comparison implementation is correct.The
compareStringsfunction correctly compares two strings using their hashes.
12-16: Struct definition is correct.The
TestVectorstruct is well-defined and appropriately used in the test functions.
9-10: Contract setup is appropriate.The
CommitmentTestcontract is set up correctly for testing theCommitmentmodule.src/lib/tree/binary/BinaryMerkleTree.sol (1)
129-129: Verify implications of visibility change to public.The
processLeavesfunction's visibility change to public increases its accessibility. Ensure this change does not introduce security or integrity issues in the broader system.
| function testCreateCommitmentV0() view external { | ||
| string memory path = "./src/lib/commitment/test/testVectors.json"; | ||
| string memory jsonData = vm.readFile(path); | ||
| bytes memory vecsData = vm.parseJson(jsonData); | ||
| TestVector[] memory vecs = abi.decode(vecsData, (TestVector[])); | ||
|
|
||
| bytes29 nsString = bytes29(fromHex(vecs[0].namespace)); | ||
| Namespace memory ns = toNamespace(nsString); | ||
| bytes memory data = fromHex(vecs[0].data); | ||
| (bytes[] memory shares, bool err) = _bytesToSharesV0(data, ns); | ||
| bytes32 commitment = _createCommitment(shares, ns); | ||
| } |
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Add assertions to validate the test.
The testCreateCommitmentV0 function lacks assertions. Consider adding checks to ensure the commitment is created correctly.
// Example assertion
// assert(commitment == expectedCommitment);
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Files selected for processing (1)
- src/lib/commitment/Commitment.sol (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/lib/commitment/Commitment.sol
Overview
Added a function to convert blobs to V0 shares, and tested it against the Go implementation using vectors created with this repo.
Summary by CodeRabbit
New Features
Commitmentmodule.Commitmentmodule, ensuring reliability through comprehensive test cases.BinaryMerkleTreeandNamespaceMerkleTreelibraries, allowing broader integration.Bug Fixes