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feat/icp #101

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feat/icp #101

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@pedrxlz pedrxlz commented Feb 27, 2025

Summary by CodeRabbit

  • New Features

    • Enhanced transaction signing functionality, ensuring accurate and secure digital signatures.
    • Improved error handling with new error states for decoding raw transactions and hashes.
    • Updated support status for the ICP chain, now marked as supported.
  • Tests

    • Added comprehensive tests to validate the updated transaction signing and message signing processes.

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coderabbitai bot commented Feb 27, 2025

Walkthrough

The pull request implements the sign_tx method in the ICP struct, which now performs Ed25519-based signing of transactions. It decodes hexadecimal raw data, extracts hashes from JSON, signs each hash, and updates the transaction's signature field. Additionally, the sign_message method has been enhanced with signing logic. Two new test functions validate the signing functionality. The error handling capabilities are improved by adding DecodeRawTx and DecodeHash variants to the ChainError enum, including updated display messages and error codes.

Changes

File(s) Change Summary
packages/kos/src/chains/icp/mod.rs Implemented sign_tx method for transaction signing and updated sign_message. Added tests test_icp_sign_tx and test_icp_sign_message.
packages/kos/src/chains/mod.rs Added DecodeRawTx and DecodeHash variants to ChainError with display messages and error codes (24 and 25). Updated supported field in ChainInfo for ICP chain from false to true.

Suggested labels

@domain/sdk

Suggested reviewers

  • klever-patrick
  • gustavocbritto

Poem

I hopped through lines of code with flair,
Signing each hash with utmost care.
My keys, once given, now vanish from sight,
As JSON and hex dance in the night.
A carrot of joy for tests so bright—
Hopping ahead, our code feels light!
Cheers from a rabbit, keeping bugs out of sight!

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Reviewing files that changed from the base of the PR and between 86a1c17 and 3b147fa.

📒 Files selected for processing (2)
  • packages/kos/src/chains/icp/mod.rs (3 hunks)
  • packages/kos/src/chains/mod.rs (4 hunks)
⏰ Context from checks skipped due to timeout of 90000ms (1)
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🔇 Additional comments (8)
packages/kos/src/chains/mod.rs (4)

62-63: Well-structured error enum additions for ICP implementation.

The addition of DecodeRawTx and DecodeHash variants to the ChainError enum provides specific error types for handling ICP transaction signing failures.


132-137: Comprehensive error display implementation.

The display implementations for the new error variants provide clear and concise error messages that will help with debugging.


229-230: Consistent error code assignment.

Error codes 24 and 25 are appropriately assigned to the new error variants, maintaining the sequential pattern established in the codebase.


538-538: ICP chain marked as supported.

The ICP chain is now marked as supported (supported: true), which aligns with the implementation of the signing functionality.

packages/kos/src/chains/icp/mod.rs (4)

79-112: Complete implementation of the ICP transaction signing.

The implementation correctly:

  1. Decodes the transaction data
  2. Extracts hashes from JSON
  3. Signs each hash using Ed25519
  4. Securely handles private keys by clearing after use
  5. Returns properly formatted signed transaction

The error handling has been properly fixed as suggested in the previous review, using the new error types.


114-124: Implemented message signing with proper key composition.

The sign_message implementation correctly combines the signature with the public key, which is a common pattern for Ed25519 signatures.


205-226: Comprehensive test for transaction signing.

The test properly verifies the ICP transaction signing functionality using a known mnemonic and checks the signature length for validity.


228-242: Effective test for message signing.

The test properly validates the message signing functionality and checks that the signature has the expected length of 96 bytes (64 bytes signature + 32 bytes public key).

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@github-actions github-actions bot added the rust label Feb 27, 2025
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Actionable comments posted: 1

🧹 Nitpick comments (5)
packages/kos/src/chains/mod.rs (2)

132-134: Consider making the error message more descriptive.
Right now, it just says "decode raw tx," which might be too generic. Including a short note about the context of the failure (e.g., hex decoding failed) can be more helpful for debugging.


135-137: Use a more informative error description.
Similarly, consider providing extra context or a hint on what/where the hash decode failed.

packages/kos/src/chains/icp/mod.rs (3)

87-89: Refine error variant for JSON parsing.
Currently, JSON parse failures are mapped to ChainError::DecodeHash. Consider adding a more specific variant (e.g., DecodeJson) to differentiate JSON parsing failures from actual hash decoding failures.


107-109: Consider computing and setting the transaction hash if empty.
Right now, setting an empty tx_hash might be suboptimal. If you have enough data to compute a transaction hash, it might be useful to do so here.


201-223: Add assertions to strengthen the test.
The current test logs the resulting signatures but doesn’t verify them. Consider asserting against an expected signature if determinism applies.

Example:

 let signed_tx = icp.sign_tx(pvk, tx).unwrap();
 let sig_str = String::from_utf8(signed_tx.signature).unwrap();
+assert!(sig_str.contains("some_expected_value"),
+    "Signatures do not match expected content");
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📥 Commits

Reviewing files that changed from the base of the PR and between da7e6cc and 86a1c17.

📒 Files selected for processing (2)
  • packages/kos/src/chains/icp/mod.rs (3 hunks)
  • packages/kos/src/chains/mod.rs (3 hunks)
⏰ Context from checks skipped due to timeout of 90000ms (1)
  • GitHub Check: format
🔇 Additional comments (7)
packages/kos/src/chains/mod.rs (2)

62-63: Nice addition for specialized error handling.
These new enum variants provide clearer distinctions for decoding errors.


229-230: Consistent error mapping.
Assigning 24 and 25 to these new variants adheres to the numeric progression in this match block. Looks good.

packages/kos/src/chains/icp/mod.rs (5)

79-83: Method signature and mutable transaction reference look appropriate.
Accepting a mutable Transaction parameter makes sense for modifying the object in-place.


94-99: Iterating over multiple hashes is a good approach.
The loop is straightforward, and each hash decode is handled with proper error propagation.


101-101: Good practice clearing the private key.
Zeroing out the key bytes helps avoid inadvertent memory leaks.


103-105: Signature encoding logic is clear.
Storing the signatures as JSON bytes is a simple approach for multiple partial signatures.


183-183: Importing custom Base64 decode is fine.
Ensure that no conflicting standard library or other crate usage is needed.

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