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What is the difference between Diligence Fuzzing and Fluffy Fuzzer

The two main differences are:

  1. Fluffy Fuzzer is intended to find consensus bugs in Geth and OpenEthereum clients whereas Harvey is intended to find bugs in Solidity smart contracts.

  2. Harvey doesn't currently do differential fuzzing, but it could (we did in a special Harvey variant we built for Optimism's safety checker).

    Optimism SafetyChecker | ConsenSys Diligence