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Changelog

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

[Unreleased]

https://github.com/Zokrates/ZoKrates/compare/latest...develop

[0.8.7] - 2023-04-22

Release

Changes

  • Reduce memory usage of compilation (#1296, @schaeff)
  • Add initial support for the Nova proving scheme (#1235, @schaeff)

[0.8.6] - 2023-04-13

Release

Changes

  • Make ZoKrates build on stable rust (#1288, @schaeff)
  • Introduce sourcemaps, introduce inspect command to identify costly parts of the source (#1285, @schaeff)
  • Change witness format to binary, optimize backend integration code to improve proving time (#1289, @dark64)
  • Fixed precedence issue on Sudoku example. (#1287, @Turupawn)
  • Reduce compiled program size by deduplicating assembly solvers (#1268, @dark64)

[0.8.5] - 2023-03-28

Release

Changes

  • Reduce memory usage and runtime by refactoring the reducer (ssa, propagation, unrolling and inlining) (#1283, @schaeff)
  • Fix radix-path help message on mpc init subcommand (#1280, @dark64)
  • Fix a potential crash in zokrates-js due to inefficient serialization of a setup keypair (#1277, @dark64)
  • Show help when running zokrates mpc (#1275, @dark64)

[0.8.4] - 2023-01-31

Release

Changes

  • Fix array propagation for spreads and repeaters (#1269, @schaeff)
  • Remove solc dependency for tests, use foundry instead (#1266, @schaeff)
  • Optimize zokrates-js library size (#1264, @dark64)
  • Use multicore feature in ark and bellman to improve performance (#1261, @dark64)
  • Allow user-provided randomness in setup and proof generation (#1254, @dark64)
  • Fix typos (#1260, @rex4539)
  • Introduce constraint generation through assembly blocks (#1246, @dark64)
  • Loosen up whitespace restrictions to allow more formatting styles (#1232, @dark64)
  • Reduce cost of boolean array equality checks (#1228, @schaeff)

[0.8.3] - 2022-10-11

Release

Changes

  • Disallow the use of the private and public keywords on non-entrypoint functions (#1224, @dark64)
  • Fix duplicate constraint optimiser (#1226, @schaeff)

[0.8.2] - 2022-09-05

Release

Changes

  • Make return statement optional if no returns are expected (#1222, @dark64)
  • Add a casting utility module to stdlib (#1215, @dark64)
  • Introduce dead code elimination (#1206, @schaeff)
  • Add magic square in javascript example to the book (#1198, @dark64)
  • Fix circom r1cs export to avoid generating unverified proofs (#1220, @schaeff)
  • Allow shadowing (#1193, @schaeff)

[0.8.1] - 2022-08-22

Release

Changes

  • Error out at compile time if the type of a logged value could not be inferred (#1209, @dark64)
  • Add backend option in zokrates-js, bring back bellman, add a log writer to support printing logs in js (#1199, @dark64)
  • Fix padding bug in keccak implementation, add support for keccak-224 and sha3-224 (#1197, @dark64)
  • Update syntax highlighters (#1195, @schaeff)
  • Avoid validity checks on the deserialization of the proving key to improve proving time (#1192, @dark64)

[0.8.0] - 2022-07-07

Release

Changes

  • Drop support for PGHR13 proving scheme (#1181, @schaeff)
  • Use signature output for constant parameter inference (#1172, @dark64)
  • Add log statements to the language (#1171, @schaeff)
  • Remove multiple returns (#1170, @dark64)
  • Introduce the mut keyword and make variables immutable by default (#1168, @schaeff)
  • Drop support for libsnark (#1153, @schaeff)
  • Split codebase into smaller crates (#1151, @schaeff)
  • Introduce curly bracket based syntax, use a semicolon to separate statements, change the syntax of if-else expression (#1121, @dark64)
  • Optionally export snarkjs artifacts (#1143, @schaeff)
  • Fix constant inlining for tuples (#1169, @dark64)
  • Change the default backend to ark in the CLI (#1165, @dark64)

[0.7.14] - 2022-05-31

Release

Changes

  • Add curve and scheme to the verification key and proof, detect these parameters on verify, print-proof, and export-verifier (#1152, @schaeff)
  • Fix one_liner.sh script not resolving latest github tag (#1146, @dark64)
  • Fix instructions to build from source (#1141, @schaeff)
  • Fix keccak padding issue, allow arbitrary input size (#1139, @dark64)
  • Fix tuple assignment when rhs is a conditional (#1138, @dark64)

[0.7.13] - 2022-04-18

Release

Changes

  • Add proof formatting utility to zokrates-js (#1131, @dark64)
  • Fix panic in some range checks over unsigned integers (#1129, @schaeff)
  • Support selection of scheme and curve in zokrates-js (#1057, @dark64)

[0.7.12] - 2022-04-11

Release

Changes

  • Handle unconstrained variables gracefully (#1120, @schaeff)
  • Show the constraint count after successful compilation (again!) (#1119, @schaeff)
  • Add support for EVM verification of the Marlin proof system (#1103, @nirvantyagi)
  • Output structured data for Marlin artifacts (#1035, @schaeff)
  • Add sha256 with padding for arbitrary input size to stdlib (#1114, @dark64)
  • Add support for tuples (#1081, @schaeff)
  • Fix encoding issue causing invalid values on u64 inputs in js environment (#1098, @dark64)
  • Use optimized range check in assertions (#1080, @dark64)

[0.7.11] - 2022-01-21

Release

Changes

  • Improve Merkle tree examples (#1077, @schaeff)
  • Support for the groth16 scheme using the ark backend, support the usage of the bls12_381 curve with the gm17 and marlin scheme (#1071, @dark64)
  • Fix out of memory issues in zokrates-js (#1083, @dark64)
  • Improve inspect command to include information about constraint count and curve (#1072, @dark64)

[0.7.10] - 2021-12-16

Release

Changes

  • Fix building issue with aarch64-apple-darwin target (M1) (#1074, @dark64)

[0.7.9] - 2021-12-14

Release

Changes

  • Add support for trusted setup ceremony using multi-party contribution (MPC) protocol (#1044, @dark64)
  • Use ark-ff under the hood for optimized field operations (#1061, @schaeff)
  • Reduce compiler memory usage using iterators, change the serialization format to CBOR (#1041, @schaeff)
  • Improve the performance of the bit decomposition solver (#1062, @schaeff)

[0.7.8] - 2021-11-23

Release

Changes

  • Fix reduction of constants (#1050, @schaeff)
  • Implement type aliasing (#982, @dark64)
  • Remove confusing returns (#1037, @schaeff)
  • Reduce cost of dynamic comparison (#1025, @schaeff)
  • Fix false positives and false negatives in struct generic inference (#1016, @schaeff)
  • Make field to uint casts truncate values bigger than uint max (#997, @dark64)
  • Add Marlin proving scheme to the backend table in the book (#1034, @schaeff)
  • Fail at compile time when complex types are known not to be equal (#1032, @schaeff)
  • Allow more postfix expressions, exit gracefully when trying to call anything else than an identifier (#1030, @schaeff)
  • Add optional message to assert statement (#1012, @dark64)
  • Introduce ternary operator (#1010, @dark64)

[0.7.7] - 2021-10-04

Release

Changes

  • Reduce the deployment cost of the g16 and pghr13 verifiers (#1008, @m1cm1c)
  • Make operators table more clear in the book (#1017, @dark64)
  • Allow calls in constant definitions (#975, @schaeff)
  • Handle out of bound accesses gracefully (#1013, @schaeff)
  • Improve error message on unconstrained variable detection (#1015, @dark64)
  • Apply propagation in ZIR (#957, @dark64)
  • Fail on mistyped constants (#974, @schaeff)
  • Graceful error handling on unconstrained variable detection (#977, @dark64)
  • Fix incorrect propagation of spreads (#987, @schaeff)
  • Add range semantics to docs (#992, @dark64)
  • Fix invalid cast to usize which caused wrong values in 32-bit environments (#998, @dark64)

[0.7.6] - 2021-08-16

Release

Changes

  • Fix stack overflow when testing equality on large arrays (#969, @schaeff)
  • Make the stdlib unpack function safe against overflows of bit decompositions for any size of output, introduce unpack_unchecked for cases that do not require determinism (#955, @schaeff)
  • Add explicit function generic parameters to docs (#962, @schaeff)
  • Add gm17 verifier to stdlib for bw6_761 (#948, @schaeff)
  • Enable constant generics on structs (#945, @schaeff)
  • Use constants in the standard library, make mimcSponge implementation generic (#942, @dark64)
  • Fix constant range check in uint lt check (#954, @schaeff)
  • Add compiler logs (#950, @schaeff)
  • Fix state corruption in the constant inliner (#949, @schaeff)
  • Fix abi encoder bug for struct values where the members are encoded in the wrong order (#947, @schaeff)
  • Bump Solidity version to latest breaking release and use Solidity's ABI v2. This means that the export-verifier CLI flag to choose the ABI coder was removed. (#844, @leonardoalt)

[0.7.5] - 2021-07-10

Release

Changes

  • Allow field inputs in hexadecimal form in case the abi specification is used (#932, @dark64)
  • Add hints to runtime errors (#931, @schaeff)
  • Reduce cost of variable memory access (#930, @schaeff)
  • Add support for the Marlin proving scheme (#927, @schaeff)
  • Add a CLI option generate-smtlib2 to output the compiled IR as an SMT formula. (#919, @leonardoalt)
  • Introduce the snark_verify_bls12_377 embed for one-layer composition of SNARK proofs (over BLS12-377/BW6-761 pair of curves where BW6-761 is used as an outer curve to BLS12-377) (#918, @dark64)
  • Add details to for-loop documentation (#924, @schaeff)

[0.7.4] - 2021-06-17

Release

Changes

  • Add FIELD_SIZE_IN_BITS, FIELD_MIN and FIELD_MAX constants to field stdlib module (#917, @dark64)
  • Fix crash on import of functions containing constants (#913, @schaeff)
  • Change endianness in keccak, sha3 and blake2s hash algorithms to big endian (#906, @dark64)
  • Documentation improvements, move examples to a separate section, remove deprecated --light flag used in a rng tutorial, add a simple file system resolver example to zokrates.js docs (#914, @dark64)
  • Fixed deserialization logic in the zokrates.js that caused issues on cli-compiled binaries (#912, @dark64)
  • Reduce the cost of conditionals (#907, @schaeff)
  • Improve propagation on if-else expressions when consequence and alternative are equal (#905, @schaeff)
  • Fix access to constant in local function call (#910, @schaeff)
  • Fix parsing of the left hand side of definitions (#896, @schaeff)
  • Fix variable write remover when isolating branches (#904, @schaeff)
  • Introduce a limit of 2**20 for for-loop sizes (#902, @schaeff)
  • Run compilation test on RNG tutorial and fix bugs (#881, @axic)

[0.7.3] - 2021-05-19

Release

Changes

  • Remove substitution in one_liner.sh script which caused Bad substitution error with sh/dash (#877, @dark64)
  • Put branch isolator behind a compilation flag in the static analyzer (#877, @dark64)

[0.7.2] - 2021-05-18

Release

Changes

  • Isolate branch panics: only panic in a branch if it's being logically executed (#865, @schaeff)
  • Support the use of constants in struct and function declarations (#864, @dark64)
  • Relax ordering of symbol declarations (#863, @dark64)
  • Update one_liner.sh script to support arm64 architecture (#861, @dark64)
  • Fix crash when updating a constant struct member to another constant (#855, @schaeff)
  • Fix treatment of uint subtraction involving constants (bug) (#852, @schaeff)
  • Add uint to abi docs (#848, @schaeff)
  • Remove side effects on complex types (bug) (#847, @schaeff)
  • Fix crash on struct member type mismatch (#846, @schaeff)
  • Fix nested struct access crash (#845, @schaeff)
  • Make error formatting consistent (#843, @schaeff)

[0.7.1] - 2021-04-30

Release

Changes

  • Fix integer inference on repeat operators (#834, @schaeff)
  • Introduce constant definitions to the language (const keyword) (#792, @dark64)
  • Introduce constant range checks for checks of the form x < c where p is a compile-time constant, also for other comparison operators. This works for any x and p, unlike dynamic x < y comparison (#761, @schaeff)
  • Handle errors more gracefully in propagation step where applicable (#832, @dark64)
  • Add interactive prompt before overwriting existing files in the one_liner.sh script (#831, @dark64)
  • Add a custom panic hook to handle internal compiler errors more gracefully (#829, @dark64)
  • Make command line errors compatible with editor cmd+click (#828, @schaeff)
  • Make function definitions more permissive, and move ambiguity checks to call sites and improve them (#826, @schaeff)
  • Detect assertion failures at compile time on constant expressions (#823, @dark64)
  • Make function selection stricter in function calls (#822, @schaeff)
  • Add the ability to import multiple symbols in a single import statement (#809, @dark64)
  • Add poseidon zk-friendly hashing algorithm to stdlib (#806, @dark64)
  • Allow optional underscore before type suffix (e.g. 42_u32) (#800, @dark64)
  • Accept explicit generic parameters outside of definitions (#798, @schaeff)

[0.7.0] - 2021-04-09

Release

Changes

  • Re-export embed functions as stdlib modules, add field to uint casts to stdlib (#801, @dark64)
  • Change left << and right >> shifts to take u32 as a second parameter (#783, @schaeff)
  • Introduce u64 type, add keccak{256,384,512} and sha3{256,384,512} hash functions to stdlib (#772, @dark64)
  • Add negative - and positive + unary operators, restricting accepted expressions in some places (exponent) to allow for better parsing (#762, @schaeff)
  • Make embed functions generic, enabling unpacking to any width at minimal cost (#754, @schaeff)
  • Add global --verbose flag to CLI for verbose logging, add --ztf flag to compile command, deprecate --light flag as its behaviour is now a default. (#751, @dark64)
  • Introduce constant generics for u32 values. Introduce literal inference (#695, @schaeff)

[0.6.4] - 2021-03-19

Release

Changes

  • re-include embeds for a slightly cheaper sha256
  • remove array ssa
  • add flag to allow unconstrained variables
  • better flattening of conjunctions
  • put backends behind features
  • accept any assignee in multidef
  • minor performance and stability improvements

For older releases and changes, visit https://github.com/Zokrates/ZoKrates/releases.