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This conference talk explores the challenges and solutions for fuzzing Rust-based smart contracts, focusing on balancing performance with security. Learn about Phink, an open-source property-based and coverage-guided fuzzing engine built on AFL++ specifically designed for ink! Rust smart contracts compiled to WebAssembly. Discover why traditional fuzzing approaches need adaptation for blockchain environments and how to effectively test for logic errors, concurrency issues, and other vulnerabilities that can bypass Rust's memory safety guarantees. Daniel and Kevin demonstrate practical techniques for ensuring smart contract correctness in this 28-minute presentation from Nullcon Goa 2025.
