Fuzzing on-chain contracts with Echidna

By Guillermo Larregay and Elvis Skozdopolj

With the release of version 2.1.0 of Echidna, our fuzzing tool for Ethereum smart contracts, we’ve introduced new features for direct retrieval of on-chain data, such as contract code and storage slot values. This data can be used to fuzz deployed contracts in their on-chain state or to test how new code integrates with existing contracts.

Echidna now has the capability to recreate real-world hacks by fuzzing contract interfaces and on-chain code. In …

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