Frequently Asked Questions

Why create a new fuzzer if Echidna is already a great fuzzer?

With medusa, we are exploring a different EVM implementation and language for our smart contract fuzzer. While Echidna is already doing an amazing job, medusa offers the following advantages:

• It is written in Go, easing the maintenance and allowing the creation of a native API for future integration into other projects.
• It uses geth as a base, ensuring the EVM equivalence.

Should I switch to medusa right away?

We do not recommend switching to medusa until it is extensively tested. However we encourage you to try it, and let us know your experience. In that sense, Echidna is our robust and well tested fuzzer, while medusa is our new exploratory fuzzer. Follow us to hear updates about medusa as it grows in maturity.

Will all the previous available documentation from secure-contracts.com will apply to medusa?

In general, yes. All the information on testing approaches and techniques will apply for medusa. There are, however, different configuration options names and a few missing or different features in medusa from Echidna that we will be updating over time.