This is a backend for the ACVM which allows proving/verifying ACIR circuits against Arkworks' groth16 proving system.
Both this backend and the underlying ark-groth16 library are proofs of concept and are not production-ready.
Note that groth16 proving system requires a circuit specific trusted setup in order to be able to generate secure proofs.
By default this backend will generate a local set of proving and verification keys to allow for circuit development; however these should be replaced with keys from a trusted setup with contributions from multiple parties.