Summary

Added

• openzeppelin_utils
  • Added lower_lookup support to checkpoint utilities (#1630)
  • Added BitMap struct and associated helpers to openzeppelin_utils::structs::bitmap (#1630)
• ERC721ConsecutiveComponent extension (#1630)
• ERC-6909 standard implementation and extensions (#1594)
  • Introduced ERC6909Component and extension components: ERC6909ContentURIComponent, ERC6909MetadataComponent, and ERC6909TokenSupplyComponent.
  • Added standard interfaces: IERC6909, IERC6909Metadata, IERC6909TokenSupply, and IERC6909ContentUri.
  • Added the ERC6909ABI trait, covering the full ERC-6909 token functionality, including all supported extensions.
• Integration of ERC-6909 components into the with_components macro (#1594)
• IERC1155Supply interface and ERC1155SupplyComponent extension for total supply tracking (#1632)
• IERC721Wrapper interface to openzeppelin_interfaces::token::erc721 (#1625)
• ERC721WrapperComponent providing ERC721 wrapping and unwrapping functionality (#1625)
• IERC20Wrapper interface to openzeppelin_interfaces::token::erc20 for ERC20 wrappers (#1617)
• ERC20WrapperComponent providing ERC20 wrapping and unwrapping functionality (#1617)

Changed

• Bump scarb to v2.15.1 (#1631)

Changed (Breaking)

• Added ERC721TokenOwnerTrait hook as a dependency to ERC721Component implementations (#1630)
  • Included ERC721OwnerOfDefaultImpl to support the default use case

Full Changes List

• Chore(deps): Bump stefanzweifel/git-auto-commit-action from 6.0.1 to 7.0.0 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1553
• Update foundry to 0.51.0 by @ericnordelo in https://github.com/OpenZeppelin/cairo-contracts/pull/1555
• Release openzeppelin_testing v6.0.0 by @ericnordelo in https://github.com/OpenZeppelin/cairo-contracts/pull/1556
• Update contract sizes benchmark by @github-actions[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1559
• Remove the coverage_incompatible feature by @ericnordelo in https://github.com/OpenZeppelin/cairo-contracts/pull/1558
• chore: remove repetitive word in comment by @vastonus in https://github.com/OpenZeppelin/cairo-contracts/pull/1561
• Chore(deps): Bump crate-ci/typos from 1.38.1 to 1.39.0 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1562
• Bump snforge to 0.51.2 by @immrsd in https://github.com/OpenZeppelin/cairo-contracts/pull/1563
• Bump Cairo to v2.13.1 by @immrsd in https://github.com/OpenZeppelin/cairo-contracts/pull/1565
• Update contract sizes benchmark by @github-actions[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1566
• Bump foundry to 0.52.0 by @ericnordelo in https://github.com/OpenZeppelin/cairo-contracts/pull/1568
• Release openzeppelin_testing-v6.1.0 by @ericnordelo in https://github.com/OpenZeppelin/cairo-contracts/pull/1569
• Chore(deps): Bump crate-ci/typos from 1.39.0 to 1.39.1 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1595
• Chore(deps): Bump crate-ci/typos from 1.39.1 to 1.39.2 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1596
• Chore(deps): Bump DavidAnson/markdownlint-cli2-action from 20.0.0 to 21.0.0 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1597
• ci: bump actions/checkout to v6 by @rejected-l in https://github.com/OpenZeppelin/cairo-contracts/pull/1603
• Chore(deps): Bump crate-ci/typos from 1.39.2 to 1.40.0 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1605
• Chore(deps): Bump DavidAnson/markdownlint-cli2-action from 21.0.0 to 22.0.0 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1607
• Fix foundry setup step in test workflow by @ericnordelo in https://github.com/OpenZeppelin/cairo-contracts/pull/1609
• Bump snforge to 0.53.0 by @immrsd in https://github.com/OpenZeppelin/cairo-contracts/pull/1610
• Chore(deps): Bump peter-evans/create-pull-request from 7 to 8 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1611
• Chore(deps): Bump stefanzweifel/git-auto-commit-action from 7.0.0 to 7.1.0 by @dependabot[bot] in https://github.com/OpenZeppelin/cairo-contracts/pull/1620

New Contributors

• @vastonus made their first contribution in https://github.com/OpenZeppelin/cairo-contracts/pull/1561
• @rejected-l made their first contribution in https://github.com/OpenZeppelin/cairo-contracts/pull/1603
• @0xpantera made their first contribution in https://github.com/OpenZeppelin/cairo-contracts/pull/1594

Full Changelog: https://github.com/OpenZeppelin/cairo-contracts/compare/v3.0.0...v4.0.0-alpha.0