Developer quality of life improvements (Nova forward ports) #226
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…mentcomputer#285) Both of these data are easily accessible, and could be very useful to clients: * Exposing the last outputs allows us to get the current state of the computation on the prover side without wasting energy recomputing it * Exposing the number of steps makes it easier to eventually pass `num_steps` into `CompressedSNARK::verify`
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* When a function already returns a `Result`, propagate errors instead of panicking with `expect` * For `NovaError::SynthesisError`, retain information about the original bellpepper error. Since `NovaError` implements `Clone` but bellpepper's `SynthesisError` does not, we keep the error information as a `String`. This commit only fixes low-hanging fruit in lib.rs, for functions that already return a `Result` and can easily propagate errors just by replacing `expect(...)` with `?`. There are still many `unwrap()` calls in functions returning `Result` in other modules, particularly gadgets. But I don't understand the code well in those parts, and I suspect some of those `unwrap()`s actually can't fail based on invariants of the code, so it makes perfect sense to leave them as is. Co-authored-by: Francois Garillot <[email protected]>
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adr1anh
approved these changes
Jan 3, 2024
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Ports the following PRs from upstream Nova:
The second required some (relatively straightforward) adaptation in the port to SuperNova, please review.