v0.9.0-alpha

What's Changed

Features

Core

• feat: Groth16 MPC setup by @HSG88 in #515
• feat: BSB22 commitments PlonK by @Tabaie in #586
• feat: add simple key-value store to the builders by @ivokub in #480
• refactor: define Committer interface for builders by @ivokub in #481
• feat: add defer to the Compiler interface by @ivokub in #483
• feat: PlonK frontend filter common cases of duplicate constraints by @gbotrel in #539
• perf: various performance improvements for PlonK prover by @gbotrel in #593
• feat, perf: introduce constraint blueprints. improve memory usage for constraint systems by @gbotrel in #641
• perf: reduce mem allocs in scs frontend by @gbotrel in #654
• feat: PlonK multicommit by @Tabaie in #668
• feat: Groth16 Multicommits by @Tabaie in #702
• feat: change opening order kzg by @ThomasPiellard in #694
• feat: adds GKR api by @Tabaie in #443
• feat: optimized PlonK solidity verifier for BN254 by @ThomasPiellard

Circuit

• feat: add a partition selector by @aybehrouz in #486
• feat: range checks using log derivative, fixes #581 by @ThomasPiellard in #583
• Add an n to 1 MUX and MAP by @aybehrouz in #475
• perf: in-circuit ECDSA on secp256k1 by @yelhousni in #497
• perf: KZG in circuit by @yelhousni in #506
• feat: BN254 pairing by @ivokub in #411
• feat: range check gadget by @ivokub in #472
• perf: emulated BN254 pairing by @yelhousni in #566
• feat: emulated BLS12-381 pairing by @yelhousni in #591
• feat: add gadget for enabling multiple commitments in-circuit by @ivokub in #562
• feat: add EVM precompiles by @ivokub in #488
• perf: use api.Select for 2 to 1 mux by @aybehrouz in #625
• feat: unified ECADD by @yelhousni in #631
• feat: log-derivative vector lookups by @ivokub in #620
• perf: KZG verification circuit in a single point by @yelhousni in #658
• feat: emulated subgroup check by @yelhousni in #629
• perf(ecdsa): JoinScalarMulBase avoids 0 edge-cases by @yelhousni in #661
• feat: differentiate ecrecover with strict and lax check for s by @ivokub in #656
• feat: implement NIST P-256 and P-384 curves by @ivokub in #697
• perf(2-chain/varScalarMul): use DoubleAndAdd to reduce #constraints by @yelhousni in #706
• perf(2-chain/varScalarMul): DoubleAndAdd to reduce #constraints BLS24 by @yelhousni in #707
• feat: add sha2 primitive by @ivokub in #689
• perf: add a generalized version of binary selection by @aybehrouz in #636
• feat: fixed-argument emulated pairing by @yelhousni in #708
• perf: Add-only emulated scalar multiplication by @yelhousni in #726
• feat: emulated pairing 2-by-2 fixed circuit for EVM by @yelhousni in #698
• perf: emulated pairing BN254 by @yelhousni in #714
• perf: ELM03+Joye07 for emulated scalarMul by @yelhousni in #760
• perf: special squaring for sparse elements in the pairing algorithm by @yelhousni in #772
• perf: Improve MultiLin.Eval number of constraints by @Tabaie in #788

Fixes

• fix: scs.MarkBoolean missing return w/ constant by @gbotrel in #491
• fix: closes #509 api did not handle AssertIsLessOrEqual with constant as first param by @gbotrel in #511
• fix: restrict constants in field emulation to width by @ivokub in #518
• fix: subtraction overflow computation bug by @ivokub in #579
• fix(emulated pairing): edge cases in torus-based final exp by @yelhousni in #613
• fix: serializeCommitment by @SherLzp in #651
• fix race condition when compiling circuits in parallel by @gbotrel in #676
• fix: emulated ToBits by @ivokub in #731
• fix: do not accumulate terms with zero coefficient for addition by @ivokub in #763

Refactor

• refactor: PlonK uses constraint/ and couple of fixes closes #467 by @gbotrel in #493
• refactor: std/algebra by @yelhousni in #526
• refactor: expose all typed backends in gnark/backend (moved from internal/) by @gbotrel in #561
• refactor: based on #515 generify groth16 MPC setup for all curves, flatten packages+ refactor by @gbotrel in #563
• refactor: Minimize Commitment info in PlonK vk by @Tabaie in #633
• refactor: hint name options by @Tabaie in #666
• refactor, perf: 2-chains pairing + groth16 API by @yelhousni in #664

New Contributors

• @HSG88 made their first contribution in #515

Full Changelog: v0.8.1...v0.9.0-alpha