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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Rust's notion of Semantic Versioning.

[Unreleased]

[0.13.1] - 2022-07-05

Added

  • bellman::groth16::batch::Verifier now has a verify_multicore method (when the multicore feature is enabled) which will internally use the global rayon thread pool to parallelize the verification of a batch of proofs.

Changed

  • The multicore feature now enables the getrandom feature of the rand_core crate.

[0.13.0] - 2022-05-06

Added

  • bellman::multiexp::Exponent

Changed

  • bellman::multiexp::multiexp now takes exponents as Arc<Vec<Exponent<_>>> instead of Arc<Vec<FieldBits<_>>>.

Fixed

  • Migrating from bitvec 0.22 to bitvec 1.0 caused a performance regression in bellman::multiexp::multiexp, slowing down proof creation. Some of that performance has been regained by refactoring multiexp.

[0.12.0] - 2022-05-04

Changed

  • MSRV bumped to 1.56.0
  • Bumped dependencies to ff 0.12, group 0.12, pairing 0.22, bitvec 1.0, blake2s_simd 1.0.

[0.11.2] - 2022-05-04

Fixed

  • Groth16 prover now correctly computes query densitites with respect to linear combinations that contain coefficients of zero.
  • Fixed an infinite recursion bug in the Display implementation for SynthesisError.

[0.11.1] - 2021-09-09

Fixed

  • Compiling with --no-default-features --features groth16 (i.e. disabling the multicore feature flag) works again.

Changed

  • bellman::multicore::Waiter::wait now consumes self (better reflecting the fact that you can't wait on the same result twice), instead of taking &self with multicore enabled and &mut self with multicore disabled.

[0.11.0] - 2021-09-08

Added

  • bellman now uses rayon for multithreading when the (default) multicore feature flag is enabled. This means that, when this flag is enabled, the RAYON_NUM_THREADS environment variable controls the number of threads that bellman will use. The default, which has not changed, is to use the same number of threads as logical CPUs.
  • bellman::multicore::Waiter
  • Default bound for bellman::multiexp::DensityTracker.
  • Default bound for bellman::gadgets::test::TestConstraintSystem.

Changed

  • Bumped dependencies to ff 0.11, group 0.11, pairing 0.21.
  • bellman::multicore has migrated from crossbeam to rayon:
    • bellman::multicore::Worker::compute now returns bellman::multicore::Waiter.
    • bellman::multiexp::multiexp now returns bellman::multicore::Waiter<Result<G, SynthesisError>> instead of Box<dyn Future<Item = G, Error = SynthesisError>>.
    • bellman::multicore::log_num_cpus is renamed to log_num_threads.
  • bellman::multiexp::SourceBuilder::new is renamed to SourceBuilder::build.

Removed

  • bellman::multicore::WorkerFuture (replaced by Waiter).

[0.10.0] - 2021-06-04

Added

  • bellman::groth16::batch::Verifier, for performing batched Groth16 proof verification.

Changed

  • Bumped dependencies to bitvec 0.22, ff 0.10, group 0.10, pairing 0.20.
  • MSRV is now 1.51.0.

[0.9.0] - 2021-01-26

Changed

  • Bumped dependencies to bitvec 0.20, ff 0.9, group 0.9, pairing 0.19, rand_core 0.6.
  • MSRV is now 1.47.0.