1# CHANGELOG
  2
  3## Pending
  4
  5### Breaking changes
  6
  7- [\#134](https://github.com/arkworks-rs/r1cs-std/pull/134) Add `Mul<NonnativeFieldVar>` bounds and impls for `CurveVar`.
  8- [\#135](https://github.com/arkworks-rs/r1cs-std/pull/135)
  9    - Rename `NonNativeFieldVar` to `EmulatedFpVar`.
 10    - Rename `fields::nonnative` to `fields::emulated_fp`.
 11    - Rename `fields::nonnative::{Allocated}NonNativeMulResultVar` to `fields::emulated_fp::{Allocated}MulResultVar`.
 12
 13### Features
 14
 15### Improvements
 16
 17### Bug Fixes
 18
 19## 0.4.0
 20
 21- [\#117](https://github.com/arkworks-rs/r1cs-std/pull/117) Fix result of `precomputed_base_scalar_mul_le` to not discard previous value.
 22- [\#124](https://github.com/arkworks-rs/r1cs-std/pull/124) Fix `scalar_mul_le` constraints unsatisfiability when short Weierstrass point is zero.
 23- [\#127](https://github.com/arkworks-rs/r1cs-std/pull/127) Convert `NonNativeFieldVar` constants to little-endian bytes instead of big-endian (`ToBytesGadget`).
 24- [\#133](https://github.com/arkworks-rs/r1cs-std/pull/133) Save 1 constraint in `FpVar::{is_eq, is_neq}` by removing the unnecessary booleanity check.
 25
 26### Breaking changes
 27
 28- [\#86](https://github.com/arkworks-rs/r1cs-std/pull/86) Change the API for domains for coset.
 29
 30### Features
 31
 32- [\#84](https://github.com/arkworks-rs/r1cs-std/pull/84) Expose `short_weierstrass::non_zero_affine` module
 33  and implement `EqGadget` for `NonZeroAffineVar`.
 34- [\#79](https://github.com/arkworks-rs/r1cs-std/pull/79) Move `NonNativeFieldVar` from `ark-nonnative` to `ark-r1cs-std`.
 35- [\#76](https://github.com/arkworks-rs/r1cs-std/pull/76) Implement `ToBytesGadget` for `Vec<UInt8>`.
 36- [nonnative/\#45](https://github.com/arkworks-rs/nonnative/pull/45) Add `new_witness_with_le_bits` which returns the bits used during variable allocation.
 37
 38### Improvements
 39
 40### Bug Fixes
 41
 42- [\#101](https://github.com/arkworks-rs/r1cs-std/pull/101) Fix `is_zero` for twisted Edwards curves.
 43- [\#86](https://github.com/arkworks-rs/r1cs-std/pull/86) Make result of `query_position_to_coset` consistent with `ark-ldt`.
 44- [\#77](https://github.com/arkworks-rs/r1cs-std/pull/77) Fix BLS12 `G2PreparedGadget`'s `AllocVar` when G2 uses a divisive twist.
 45
 46## v0.3.1
 47
 48### Features
 49
 50- [\#71](https://github.com/arkworks-rs/r1cs-std/pull/71) Implement the `Sum` trait for `FpVar`.
 51- [\#75](https://github.com/arkworks-rs/r1cs-std/pull/71) Introduce `mul_by_inverse_unchecked` for `FieldVar`. This accompanies the bug fix in [\#70](https://github.com/arkworks-rs/r1cs-std/pull/70).
 52
 53### Bug Fixes
 54
 55- [\#70](https://github.com/arkworks-rs/r1cs-std/pull/70) Fix soundness issues of `mul_by_inverse` for field gadgets.
 56
 57## v0.3.0
 58
 59### Breaking changes
 60
 61- [\#60](https://github.com/arkworks-rs/r1cs-std/pull/60) Rename `AllocatedBit` to `AllocatedBool` for consistency with the `Boolean` variable.
 62  You can update downstream usage with `grep -rl 'AllocatedBit' . | xargs env LANG=C env LC_CTYPE=C sed -i '' 's/AllocatedBit/AllocatedBool/g'`.
 63- [\#65](https://github.com/arkworks-rs/r1cs-std/pull/65) Rename `Radix2Domain` in `r1cs-std` to `Radix2DomainVar`.
 64- [nonnative/\#43](https://github.com/arkworks-rs/nonnative/pull/43) Add padding to allocated nonnative element's `to_bytes`.
 65
 66### Features
 67
 68- [\#53](https://github.com/arkworks-rs/r1cs-std/pull/53) Add univariate evaluation domain and Lagrange interpolation.
 69
 70### Improvements
 71
 72- [\#65](https://github.com/arkworks-rs/r1cs-std/pull/65) Add support for non-constant coset offset in `Radix2DomainVar`.
 73
 74### Bug Fixes
 75
 76## v0.2.0
 77
 78### Breaking changes
 79
 80- [\#12](https://github.com/arkworks-rs/r1cs-std/pull/12) Make the output of the `ToBitsGadget` impl for `FpVar` fixed-size
 81- [\#48](https://github.com/arkworks-rs/r1cs-std/pull/48) Add `Clone` trait bound to `CondSelectGadget`.
 82
 83### Features
 84
 85- [\#21](https://github.com/arkworks-rs/r1cs-std/pull/21) Add `UInt128`
 86- [\#50](https://github.com/arkworks-rs/r1cs-std/pull/50) Add `DensePolynomialVar`
 87
 88### Improvements
 89
 90- [\#5](https://github.com/arkworks-rs/r1cs-std/pull/5) Speedup BLS-12 pairing
 91- [\#13](https://github.com/arkworks-rs/r1cs-std/pull/13) Add `ToConstraintFieldGadget` to `ProjectiveVar`
 92- [\#15](https://github.com/arkworks-rs/r1cs-std/pull/15), #16 Allow `cs` to be `None` when converting a Montgomery point into a Twisted Edwards point
 93- [\#20](https://github.com/arkworks-rs/r1cs-std/pull/20) Add `CondSelectGadget` impl for `UInt`s
 94- [\#22](https://github.com/arkworks-rs/r1cs-std/pull/22) Reduce density of `three_bit_cond_neg_lookup`
 95- [\#23](https://github.com/arkworks-rs/r1cs-std/pull/23) Reduce allocations in `UInt`s
 96- [\#33](https://github.com/arkworks-rs/r1cs-std/pull/33) Speedup scalar multiplication by a constant
 97- [\#35](https://github.com/arkworks-rs/r1cs-std/pull/35) Construct a `FpVar` from bits
 98- [\#36](https://github.com/arkworks-rs/r1cs-std/pull/36) Implement `ToConstraintFieldGadget` for `Vec<Uint8>`
 99- [\#40](https://github.com/arkworks-rs/r1cs-std/pull/40), #43 Faster scalar multiplication for Short Weierstrass curves by relying on affine formulae
100- [\#46](https://github.com/arkworks-rs/r1cs-std/pull/46) Add mux gadget as an auto-impl in `CondSelectGadget` to support random access of an array
101
102### Bug fixes
103
104- [\#8](https://github.com/arkworks-rs/r1cs-std/pull/8) Fix bug in `three_bit_cond_neg_lookup` when using a constant lookup bit
105- [\#9](https://github.com/arkworks-rs/r1cs-std/pull/9) Fix bug in `short_weierstrass::ProjectiveVar::to_affine`
106- [\#29](https://github.com/arkworks-rs/r1cs-std/pull/29) Fix `to_non_unique_bytes` for `BLS12::G1Prepared`
107- [\#34](https://github.com/arkworks-rs/r1cs-std/pull/34) Fix `mul_by_inverse` for constants
108- [\#42](https://github.com/arkworks-rs/r1cs-std/pull/42) Fix regression in `mul_by_inverse` constraint count
109- [\#47](https://github.com/arkworks-rs/r1cs-std/pull/47) Compile with `panic='abort'` in release mode, for safety of the library across FFI boundaries
110- [\#57](https://github.com/arkworks-rs/r1cs-std/pull/57) Clean up `UInt` docs
111
112## v0.1.0
113
114Initial release