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sui-core Bug Fixes

Open source contributions to the Sui validator

RustSui CoreValidator LogicConsensus

The Problem

Sui is critical infrastructure. Bugs in validators can cause network issues or security vulnerabilities.

The Solution

Deep code review and bug hunting in the sui-core repository. Found and reported 14 bugs across multiple subsystems.

Key Features

  • 5 PRs submitted to MystenLabs/sui
  • Epoch boundary vulnerability fixes
  • Checkpoint building improvements
  • Consensus handling corrections
  • Pruning logic fixes

Architecture

The Sui validator is a complex Rust system with multiple subsystems: consensus, execution, checkpoint building, state sync, and pruning.

Challenges

  • Understanding a large, complex Rust codebase
  • Reproducing race conditions and edge cases
  • Writing clear bug reports with reproduction steps

Lessons Learned

  • Reading code is as important as writing it
  • Edge cases often hide at system boundaries
  • Open source contributions require patience and persistence

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