# CHANGELOG ## Pending ### Breaking changes - [\#121](https://github.com/arkworks-rs/r1cs-std/pull/121) - Refactor `UInt{8,16,64,128}` into one struct `UInt`. - Remove `bits` module. - Use `std::ops` traits for `UInt` and `Boolean`. - [\#134](https://github.com/arkworks-rs/r1cs-std/pull/134) Add `Mul` bounds and impls for `CurveVar`. - [\#135](https://github.com/arkworks-rs/r1cs-std/pull/135) - Rename `NonNativeFieldVar` to `EmulatedFpVar`. - Rename `fields::nonnative` to `fields::emulated_fp`. - Rename `fields::nonnative::{Allocated}NonNativeMulResultVar` to `fields::emulated_fp::{Allocated}MulResultVar`. - [\#136](https://github.com/arkworks-rs/r1cs-std/pull/136) - Rename `ToBytesGadget::to_{non_unique_}bytes` → `ToBytesGadget::to_{non_unique_}bytes_in_le`. ### Features - [\#136](https://github.com/arkworks-rs/r1cs-std/pull/136) - Add `{BitAnd,BitOr,BitXor,BitAndAssign,BitOrAssign,BitXorAssign} for UInt`. - Add `UInt::rotate_{left,right}_in_place`. - Add `{Boolean,UInt}::not_in_place`. - Add `UInt::{from_bytes_le, from_bytes_be, to_bytes_be}`. ### Improvements ### Bug Fixes ## 0.4.0 - [\#117](https://github.com/arkworks-rs/r1cs-std/pull/117) Fix result of `precomputed_base_scalar_mul_le` to not discard previous value. - [\#124](https://github.com/arkworks-rs/r1cs-std/pull/124) Fix `scalar_mul_le` constraints unsatisfiability when short Weierstrass point is zero. - [\#127](https://github.com/arkworks-rs/r1cs-std/pull/127) Convert `NonNativeFieldVar` constants to little-endian bytes instead of big-endian (`ToBytesGadget`). - [\#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. ### Breaking changes - [\#86](https://github.com/arkworks-rs/r1cs-std/pull/86) Change the API for domains for coset. ### Features - [\#84](https://github.com/arkworks-rs/r1cs-std/pull/84) Expose `short_weierstrass::non_zero_affine` module and implement `EqGadget` for `NonZeroAffineVar`. - [\#79](https://github.com/arkworks-rs/r1cs-std/pull/79) Move `NonNativeFieldVar` from `ark-nonnative` to `ark-r1cs-std`. - [\#76](https://github.com/arkworks-rs/r1cs-std/pull/76) Implement `ToBytesGadget` for `Vec`. - [nonnative/\#45](https://github.com/arkworks-rs/nonnative/pull/45) Add `new_witness_with_le_bits` which returns the bits used during variable allocation. ### Improvements ### Bug Fixes - [\#101](https://github.com/arkworks-rs/r1cs-std/pull/101) Fix `is_zero` for twisted Edwards curves. - [\#86](https://github.com/arkworks-rs/r1cs-std/pull/86) Make result of `query_position_to_coset` consistent with `ark-ldt`. - [\#77](https://github.com/arkworks-rs/r1cs-std/pull/77) Fix BLS12 `G2PreparedGadget`'s `AllocVar` when G2 uses a divisive twist. ## v0.3.1 ### Features - [\#71](https://github.com/arkworks-rs/r1cs-std/pull/71) Implement the `Sum` trait for `FpVar`. - [\#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). ### Bug Fixes - [\#70](https://github.com/arkworks-rs/r1cs-std/pull/70) Fix soundness issues of `mul_by_inverse` for field gadgets. ## v0.3.0 ### Breaking changes - [\#60](https://github.com/arkworks-rs/r1cs-std/pull/60) Rename `AllocatedBit` to `AllocatedBool` for consistency with the `Boolean` variable. You can update downstream usage with `grep -rl 'AllocatedBit' . | xargs env LANG=C env LC_CTYPE=C sed -i '' 's/AllocatedBit/AllocatedBool/g'`. - [\#65](https://github.com/arkworks-rs/r1cs-std/pull/65) Rename `Radix2Domain` in `r1cs-std` to `Radix2DomainVar`. - [nonnative/\#43](https://github.com/arkworks-rs/nonnative/pull/43) Add padding to allocated nonnative element's `to_bytes`. ### Features - [\#53](https://github.com/arkworks-rs/r1cs-std/pull/53) Add univariate evaluation domain and Lagrange interpolation. ### Improvements - [\#65](https://github.com/arkworks-rs/r1cs-std/pull/65) Add support for non-constant coset offset in `Radix2DomainVar`. ### Bug Fixes ## v0.2.0 ### Breaking changes - [\#12](https://github.com/arkworks-rs/r1cs-std/pull/12) Make the output of the `ToBitsGadget` impl for `FpVar` fixed-size - [\#48](https://github.com/arkworks-rs/r1cs-std/pull/48) Add `Clone` trait bound to `CondSelectGadget`. ### Features - [\#21](https://github.com/arkworks-rs/r1cs-std/pull/21) Add `UInt128` - [\#50](https://github.com/arkworks-rs/r1cs-std/pull/50) Add `DensePolynomialVar` ### Improvements - [\#5](https://github.com/arkworks-rs/r1cs-std/pull/5) Speedup BLS-12 pairing - [\#13](https://github.com/arkworks-rs/r1cs-std/pull/13) Add `ToConstraintFieldGadget` to `ProjectiveVar` - [\#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 - [\#20](https://github.com/arkworks-rs/r1cs-std/pull/20) Add `CondSelectGadget` impl for `UInt`s - [\#22](https://github.com/arkworks-rs/r1cs-std/pull/22) Reduce density of `three_bit_cond_neg_lookup` - [\#23](https://github.com/arkworks-rs/r1cs-std/pull/23) Reduce allocations in `UInt`s - [\#33](https://github.com/arkworks-rs/r1cs-std/pull/33) Speedup scalar multiplication by a constant - [\#35](https://github.com/arkworks-rs/r1cs-std/pull/35) Construct a `FpVar` from bits - [\#36](https://github.com/arkworks-rs/r1cs-std/pull/36) Implement `ToConstraintFieldGadget` for `Vec` - [\#40](https://github.com/arkworks-rs/r1cs-std/pull/40), #43 Faster scalar multiplication for Short Weierstrass curves by relying on affine formulae - [\#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 ### Bug fixes - [\#8](https://github.com/arkworks-rs/r1cs-std/pull/8) Fix bug in `three_bit_cond_neg_lookup` when using a constant lookup bit - [\#9](https://github.com/arkworks-rs/r1cs-std/pull/9) Fix bug in `short_weierstrass::ProjectiveVar::to_affine` - [\#29](https://github.com/arkworks-rs/r1cs-std/pull/29) Fix `to_non_unique_bytes` for `BLS12::G1Prepared` - [\#34](https://github.com/arkworks-rs/r1cs-std/pull/34) Fix `mul_by_inverse` for constants - [\#42](https://github.com/arkworks-rs/r1cs-std/pull/42) Fix regression in `mul_by_inverse` constraint count - [\#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 - [\#57](https://github.com/arkworks-rs/r1cs-std/pull/57) Clean up `UInt` docs ## v0.1.0 Initial release