v2.6.0

This is the Cairo version associated with Starknet 0.13.1. Contracts written with 2.6.0 are not declarable on Starknet until the upgrade.

Major Updates

• Added support for gas coupons.
  • Gas coupons are a way to pay for calling a function, in a different place then the actual function call.
  • Allows support for recursive destructs (as we can hold such a coupon for the recursive destruct call in the recursive object).
  • Only available with experimental flags.
• Support for complex consts (Non-Zero, struct, enum).
• More aggressive function inlining heuristics.

New Feautres

• Better manual gas handling - if gas is handled manually - gas withdrawal is not automatically added. #4880
• Added if-let expression support.
• Added support for underscore pattern in match on tuples. #4996
• Add cmp::minmax function by @delaaxe in #4981
• Added while let support.
• Add remaining assert_xx! comparison test macros by @iamvukasin in #4936
• Add TryInto<u512, u256> by @delaaxe in #5031
• feat: add num::traits::ops::OverflowingAdd trait by @enitrat in #4988
• feat: OverflowingSub trait by @enitrat in #5164
• feat: OverflowingMul trait by @enitrat in #5172
• feat: wrapping traits by @enitrat in #5175
• Fixed array support [1, 4, 5] of type [felt252; 3].
  • No support for conversion into a span for Index access yet, basically equivalent to (felt252, felt252, felt252) for the time being.

Optimizations

• Improved performance for ecdsa. #4985
• Add split_structs optimization - preventing carry of full structs merges due to partial changes. #5034
• Add scrub units optimization.

Bug Fixes

• if let inside loops properly works. #5016
• Fix bug in local variables aliasing. #5028
• Fixed struct formatting. Closing issue #5032. #5062
• Fix enable ap tracking detection bug. #5073
• fix: enum store derive by @enitrat in #5191

Other updates

• Pluralize "test" when needed in tests info output by @kwkr in #5080
• docs: update reserved keywords by @enitrat in #5125
• fixed typo by @zhaichuankai in #5153

New Contributors

• @delaaxe made their first contribution in #4981
• @iamvukasin made their first contribution in #4936
• @thor314 made their first contribution in #5030
• @kwkr made their first contribution in #5080
• @zhaichuankai made their first contribution in #5153

Full Changelog: v2.5.4...v2.6.0

v2.6.0-rc.1

New Features

• Support for non-zero consts at the Sierra level.
• const_as_immediate in Sierra as an addition to the existing const_as_box.
• Added while let support.
• Add remaining assert_xx! comparison test macros by @iamvukasin in #4936
• Add TryInto<u512, u256> by @delaaxe in #5031

Optimizations

• Add split_structs optimization - preventing carry of full structs merges due to partial changes. #5034

Bug Fixes

• if let inside loops properly works. #5016
• Fix bug in local variables aliasing. #5028

New Contributors

• @iamvukasin made their first contribution in #4936
• @thor314 made their first contribution in #5030

Full Changelog: v2.6.0-rc.0...v2.6.0-rc.1

v2.5.4

Bug fixes

• Fixed struct pattern formatting. Fixes issue #5032. #5062
• Added pub for storage member modules. #5065
• Prevented pub construct cancellation in cases of differing user types. #4938

Full Changelog: v2.5.3...v2.5.4

v2.6.0-rc.0

This is the Cairo version associated with Starknet 0.13.1. Contracts written with 2.6.0 are not declarable on Starknet until the upgrade.

Major Updates

• Added support for gas coupons.
  • Gas coupons are a way to pay for calling a function, in a different place then the actual function call.
  • Allows support for recursive destructs (as we can hold such a coupon for the recursive destruct call in the recursive object).
  • Only available with experimental flags.
• Support for const simple value, as well as wrapping structs and enums of these in Sierra.

New Feautres

• Better manual gas handling - if gas is handled manually - gas withdrawal is not automatically added. #4880
• Added if-let expression support.
• Added support for underscore pattern in match on tuples. #4996
• Add cmp::minmax function by @delaaxe in #4981

Optimizations

• Improved performance for ecdsa. #4985

New Contributors

• @delaaxe made their first contribution in #4981

Full Changelog: v2.5.3...v2.6.0-rc.0

v2.5.3

Bug Fixes

• Allow renaming a variable twice as it might happen in some cases. #4967

Full Changelog: v2.5.2...v2.5.3

v2.5.2

Bug Fixes

• Fixed execution order of struct-construct to stated member ordering. #4947
• Fixed while formatting. #4958
• Fixed bug in optimizing out code. #4961

Full Changelog: v2.5.1...v2.5.2

v2.5.1

New features

• Allow use starknet::get_block_number by @milancermak in #4914
• Added base struct for struct constructions. #4923
  • Usage example: A { a: 5, b: 7, ..base_struct_of_type_A }
• Display for snapshots by @piotmag769 in #4745
• Support feature at module and fn level. #4941

Bug fixes

• Fix try_into for integers to not panic. #4874
• Made integer overflowing ops pub. #4942
• Prevented starknet plugin from code generation on items not on config. #4909

New Contributors

• @keienWang made their first contribution in #4919

Full Changelog: v2.5.0...v2.5.1

v2.5.0

Read more on post.

Major updates

• Breaking change: starknet::Call::calldata is now a Span. Direct usages relying on it may break.
  • The change is required to vastly reduce the costs of using account contracts.
• New edition 2023_11 - introducing pub for struct members and module items.
  • Kudos to @Jinwei1987 for writing the original visibility addition code.
• Use cairofmt::skip in the formatter. #4387
• Added warnings - can be ignored in crate - and won't be affected by dependencies
  • Added warning for unhandled error types. #4454
  • Added warnings for unused variables. #4457
  • Depraction warning for external(v0) on impls. #4470
  • Added starknet ABI failures as warnings. #4493
  • Added abi failure + warning for account contract functions. #4575
  • Added warnings for bad embeddable impls. #4796
  • Added unstable and feature attributes and warnings on usage of unstable features.
    • Warning be ignored using feature("feature_name") on an expression wrapping the usage.
    • unstable specifically added for SafeDispatchers usage.
• Experimental feature for negative impls.
• Fixed get_dep_component inline macro. #4742

New Features

• Added Bits<T> in num module by @akhercha in #4251
• Added more data for missing method diagnostic. #4405
• Added assert_ne! test macro by @clint419 in #4424
• Adding snapshot forwarding. #4430
• Adding must_use annotation for types and functions.
• support for match out of order for enums. #4536
• Added Debug derive for various corelib types.
• support for otherwise pattern in match for enums. #4557
• support for match on true/false in parser and semantic. #4559
• Added Store impl for ByteArray. #4596
• Added while loops.
• Add bool::then_some function by @LucasLvy in #4529
• Add support for match on none felt252 numeric values. #4764
• Added Serde, Store, PartialEq, Debug and Display for NonZero. #4795
• Added PartialOrd for ContractAddress. #4863

Bug fixes

• Fix attribute parsing with only an identifier after. #4407
• Made auto-available traits be prelude based. #4410
• Made contract address calculation deterministic by @enitrat in #4391
• Fixed deploy syscall address registry by @enitrat in #4489
• Avoid Not a trait. diagnostic if a diagnostic was already reported. #4477
• Added error for nopanic cycles. #4643
• Added breaking of stack if no longer holding a var as temp. #4777

Optimizations

• Improve Span deserialization. #4595
• Better performance of is_empty. #4715
• Add return optimizations - if a value is ready for function return early - it is returned early - reducing many extra writes.
• Pass Call::calldata as a Span. #4620

Others

• Update linear-types.adoc by @Akare123 in #4508
• fix: several links pointing to legacy repository uri by @krauspt in #4568
• Update match-expressions.adoc by @AdventureSeeker987 in #4607
• fix: minor typos by @tudorpintea999 in #4500

New Contributors

• @clint419 made their first contribution in #4378
• @akhercha made their first contribution in #4251
• @dedushky made their first contribution in #4388
• @Akare123 made their first contribution in #4508
• @krauspt made their first contribution in #4568
• @AdventureSeeker987 made their first contribution in #4607
• @tudorpintea999 made their first contribution in #4500

Full Changelog: v2.4.3...v2.5.0

v2.4.4

What's Changed

• Refactoring for better errors.

Full Changelog: v2.4.3...v2.4.4

v2.5.0-dev.1

Internal release for internal development purposes only.