Add precompile forwarder, ECDSA recover lib, bytecode mutator starter - #674
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mijinummi merged 1 commit intoJul 28, 2026
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Adds small, focused starter implementations for three assigned issues (only 3 open issues were assigned to this account, not 4):
PrecompileForwarder: Yul staticcall wrappers for the ecrecover (0x01) and sha256 (0x02) precompiles with zero extra memory copies. modexp/bn256Pairing forwarding is a natural follow-up.YulECDSARecover: ECDSA recovery with the standard secp256k1n/2 malleability check, unpacking r/s/v directly from calldata.mutate_bytecode: a dependency-free starter bytecode mutation engine (single-byte flips via a seeded xorshift RNG) as a first building block toward the full gas-spike fuzzer.These are intentionally small starter implementations; the remaining precompiles, a gas_runner harness, and dedicated test suites can follow in subsequent PRs.
Closes #667
Closes #661
Closes #668