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chore: Implement attestation message handling #152

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@alpe alpe commented Jun 24, 2025

🚧 WIP: This breaks IBC transfers test currently: Error: No IBC denom found in balance after transfer!

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Summary of Changes

Hello @alpe, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces the core logic for handling attestation messages within the network module. It significantly refactors the existing Attest message handler to incorporate robust vote signature and block hash verification, leveraging a newly introduced BlockSource interface for historical block data retrieval. The changes also refine the epoch-based attestation tracking and include comprehensive unit tests for the new functionality. This is an early, work-in-progress version laying the groundwork for secure attestation processing.

Highlights

  • Attestation Message Refactoring: The Attest message handler has been significantly refactored into smaller, more focused helper functions (validateAttestation, updateAttestationBitmap, updateEpochBitmap, verifyVote) to improve readability and maintainability.
  • Vote Signature Verification: The Attest message now includes robust verification of the CometBFT vote signature and block hash against historical block data, ensuring the authenticity and integrity of attestations. This is handled by the new verifyVote function.
  • Block Source Integration: A new BlockSource interface has been introduced and integrated into the Keeper to allow fetching historical block data, which is crucial for the vote verification process.
  • Epoch-based Attestation Logic: The attestation process now explicitly checks that validators are attesting for the immediately preceding epoch (GetCurrentEpoch() != votedEpoch+1), and the epoch bitmap logic has been refined with a dedicated updateEpochBitmap helper.
  • Enhanced Testing: A new comprehensive test suite for the Attest message has been added, including mocking of external dependencies like the StakingKeeper and BlockSource, to ensure the correctness of the new verification logic.
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Code Review

The pull request implements attestation message handling, including validation, bitmap updates, and signature verification. It also adds a BlockSource interface for retrieving block data. The code includes new functions for validating attestations, updating bitmaps, and verifying votes. The changes also include adding a block source to the keeper and updating the message server to handle attestation messages.

Base automatically changed from alex/val_net_hack to main June 27, 2025 08:37
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alpe commented Jun 27, 2025

/gemini help

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You can request assistance from Gemini at any point in your pull request via creating an issue comment (i.e. comment on the pull request page) using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands.

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Code Review /gemini review Performs a code review for the current pull request in its current state.
Pull Request Summary /gemini summary Provides a summary of the current pull request in its current state.
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@alpe alpe force-pushed the alex/val_net_val_sig branch from 78dfe9e to e09076e Compare June 30, 2025 08:00
@alpe alpe changed the title [WIP]: Implement attestation message handling chore: Implement attestation message handling Jun 30, 2025
@alpe alpe force-pushed the alex/val_net_val_sig branch from 61cd975 to f48ac21 Compare June 30, 2025 11:31
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