v1.0.0-rc0

Optimizations:

• Sierra code size:
  • Compressed sierra code - X20 shrinking of the sent code size.
  • Removed unrequired StructDestructure commands when followed by drops.

Bug Fixes:

• 2932 - Branch Alignment Issue
• 2933 - Made contract using bitwise operations compile
• 2946 - Felt252Dict works now

Breaking Changes:

• Made Serde non owning (Kudos @wraitii)
• Removed Sierra libfuncs that weren’t required (does not break Cairo1.0 existing code, as this just changed the underlying implementation of the code).
  • u{8,16,32,64,128}_le, u{8,16,32,64,128}_lt (replaced by using `u*_overflowing_sub)
  • felt252_dict_read, felt252_dict_write (replaced by felt252_dict_entry_*)
  • u128_wide_mul (replaced by u128_guarantee_mul and u128_mul_guarantee_verify)
  • Attribute argos are now : based instead of = based.
  • #[should_panic(expected: ('assert(false)', ))]
• Names of parameters in impl methods are now enforced to be the same as in the trait.

New Features:

• Only a single constructor in contract is enforced earlier (Kudos @tserg)
• continue now supported in loop blocks (Kudos @tserg)
• Basic Keccak support - still pending user level code of generating padding.
• Felt252Dict now has an update option through the entry method.
• #[test] framework now supports contract interoperability simulation.
  • code example
• Added u256_sqrt.
• use statement aliases are now supported.
  • use some::path::to::usage as better_name;
• use statement can now provide multiple values.
  • use some::path::to::{one, the_other};
• New #[inline] attribute, allows inlining of functions that may call themselve.
• Added cmp::{min, max} for PartialOrd supporting types (Kudos @bllu404)
• Improved formatting all around
• Additional and more efficient Integer casting (Kudos @hemantjoestar)

Additional Contributions:

• Fix should_panic error message (Kudos @andrew-fleming)
• Implement inline macro parsing (Kudos @tarrencev)
• Rename test in ecdsa_completeness (Kudos @gaetbout)
• Migrate to @types/vscode & @vscode/test-electron (Kudos @pcdotfan)
• Refactor parser.lalrpop to remove unicode-perl regex (Kudos @tarrencev)
• Expose test runner as lib (Kudos @ericnordelo)
• Initialize db in TestRunner constructor (Kudos @tarrencev)
• Expose TestRunner members (Kudos @tarrencev)
• Restore starknet-compile (Kudos @war-in)
• Expose more use statements in the starknet module (Kudos @taco-paco)
• Adding u128 overflow sub (Kudos @gaetbout)
• Displays cairo-run panic msg as string (Kudos @notV4l)
• Fix and unify list styles (Kudos @microbecode)

v1.0.0-alpha.7

Note: This version is not yet supported on starknet!

• Automatic withdraw_gas calls
  • Added automatic addition of withdraw_gas_all calls to cycles in your Cairo code. That is, you no more need to manually add it anywhere.
• Added basic docs
• u256 division
  • / and % operators for u256.
• Removed turbofish need in many places
• Span::slice()
• Poseidon support (Not in starknet yet)
• Inferred literal types
• match and .expect() optimizations
• Support for loop expr:

  let res = loop { …; break expr; };

• panic_with_felt252()
• BoundedInt trait
  • BoundedInt::max() and BoundedInt::min()
• Index operator
• Oct and bin literals
• Destructors
  • Destruct trait for destructing non Droppable objects such as Dict
• Span pop_back
• #[should_panic] attribute syntax change, = was replaced with : to match named function arguments syntax:

  #[should_panic(expected: ('panic_with_felt252()', ))]

v1.0.0-alpha.6

Cairo compiler.

v1.0.0-alpha.5

Cairo compiler.

v1.0.0-alpha.4

Release notes

Cairo Language

Added ability to test specific panic values in tests. For example:

#[test]
#[should_panic(expected = ('assert(false)'))]
fn test_assert_false() {
    assert(false, 'assert(false)');
}

• Syntax:
  No need for turbofish in types. For example, Array::<felt> is now Array<felt>.
  ref arguments no longer have to be the first arguments.

• Added Array::span to the corelib.

StarkNet contract features

All execution info getters was merged into one syscall. These syscalls were removed:

    get_block_number_syscall
    get_block_timestamp_syscall
    get_caller_address_syscall
    get_contract_address_syscall
    get_sequencer_address_syscall 

And replaced with:

	get_execution_info_syscall

Release v1.0.0-alpha.3

Release notes

Cairo Language

• Snapshot type - A type that creates a reference to an object at a point in time, which can not be further changed, of a possibly non-copyable object.
  Added Snapshot operator @ and De-snapping operator *.
  For example - Snapshot:

trait ArrayTrait<T> {
	...
    fn at(self: @Array::<T>, index: usize) -> @T;
    ...
}

Desnapping:

let mut arr = ArrayTrait::new();
arr.append(10);
let x = *arr.at(0_usize);

• Improved inlining - more functions are supported.
  New #[inline(never)] attribute.

• EC library extended:
  ec_point_zero, ec_point_is_zero, ec_state_finalize.

• New operators: +=, -=, *=, /=, %=.

• Traits for Neg and Not operators.

• Into and TryInto traits.

• Support for new integer types: u8, u16, u32, u64.

• Improved diagnostics.

StarkNet contract features

• Contract address. For example:

#[contract]
mod contract {
	...
    #[event]
    fn Transfer(from: ContractAddress, to: ContractAddress, value: u256) {}

    #[event]
    fn Approval(owner: ContractAddress, spender: ContractAddress, value: u256) {}
    ...
}

Sierra

The Sierra language was stabilized as a preparation for integration with Starknet.

Bug fixes

Fixed Dups and Drops behavior.
Fixed types inference bug.
Support recursive types.

Release v1.0.0-alpha.2

Release notes

Cairo Language

• Support for type inference. For example:
  Instead of:

  let arr = ArrayTrait::<felt>::new();
  arr.append(1);
  

  You can now also use:

  let arr = ArrayTrait::new();
  arr.append(1);
  

• Support for global constants: const CONSTANT: felt = 1;
• Support for serialization:

  let mut data = ArrayTrait::new();
  serde::Serde::serialize(ref data, value);
  

• Syntax change - requiring ref keyword on callsite. For example:
  Instead of

  array_append(arr, 1);
  

  Use:

  array_append(ref arr, 1);
  

• Support for dictionaries from felt to {u128, felt, u8, u64, Nullable::<T>}.

  let mut d = DictFeltToTrait::new();
  d.insert(1, 1); // Write.
  d.get(1); // Read.
  d.squash(); // Destroy the dictionary.
  

• Function inlining - support only for very simple functions. For example:

  #[inline(always)]
  fn foo(arg: felt) -> felt { … }
  

• Basic print capabilities.

  debug::print_felt(‘some debug short string’);
  

• Trait support. For example:

  trait SomeTrait<T> {
      fn some_func(a: T);
  }
  impl SomeTypeSomeTrait of SomeTrait::<SomeType> {
      fn some_func(a:  SomeType) { …implementation… }
  }
  
  // This line would now work in code that sees both `SomeTrait` and `SomeTypeSomeTrait`.
  SomeTrait::some_func(SomeType { … initialization … });
  

• Self and methods support. For example:

  struct MyStruct { … members … }
  trait MyTrait {
      fn calc(self: MyStruct, a: felt) -> u128;
  }
  impl MyImpl of MyTrait {
      fn calc(self: MyStruct, a: felt) -> u128 { … implementation … }
  }
  
  // This line would now work in code that sees both `MyTrait` and `MyImpl`.
  let value =  MyStruct { … initialization ... }.calc(5);
  

• Generic user code support. For example:

  fn pair_swap<T, S>(p: (T, S)) -> (S, T) {
     let (t, s) = p;
     (s, t) 
  }
  

• Added ec library support
  • ec::{ec_state_init, ec_state_add, ec_state_finalize, ec_state_add_mul}
  • ec::{EcPoint, ec_point_new, ec_point_from_x, ec_point_unwrap, ec_neg}
  • Core Library extended:
  • Option::{is_some, is_none, unwrap, expect}
  • Result::{is_ok, is_err, unwrap, expect, unwrap_err, expect_err}
  • Array::{new, at, get, len, append, pop_front}
  • DictFeltTo::{new, insert, get, squash}

StarkNet contract features

• Mapping storage variables. For example:

  #[contract]
  mod contract {
    struct Storage {
      mapping: Map::<key_type, value_type>,
    }
    …
  }
  

• Wider storage variables support. For example:

  #[contract]
  mod contract {
    struct Storage {
      mapping: Map::<u256, u256>,
    }
    …
  }
  

• Events. For example:

  #[contract]
  mod contract {
    …
    #[event]
    fn SomeEvent(value1: felt, value2: bool, value3: u256) {}
  }
  

Bug fixes

• Borrow checking is now handled correctly.
• Multiple panics were removed.
• Crate can be used as a dependency - by explicitly specifying corelib location.

Release 0.1.0

Release 0.1.0

Includes:

• Cairo compiler
• Sierra compiler
• Starknet compiler
• Language server
• Formatter
• Runner and testing framework