Solidity Contracts v3.0.0

Description

This release candidate brings several major improvements to Solidity IBC, focused on expanding application support, improving cross-chain token transfers, and simplifying the contract APIs ahead of the final v3 release.

The main addition is ICS27GMP, the new contract calls application. This enables generalized cross-chain contract execution through IBC, expanding Solidity IBC beyond token transfers into broader cross-chain application use cases.

This release also adds IFT, a new token transfer standard implementation. IFT is intended to support more flexible interoperability burn/mint pattern and will help pave the way for future Solana connectivity.

For chains that do not yet have a dedicated light client protocol, this release introduces an attestation multisig light client. This provides a practical verification path for additional ecosystems while dedicated light clients are still under development.

On the contracts side, OpenZeppelin AccessControl has been replaced with AccessManager, giving deployments a more explicit and flexible access management model. The release also includes API-breaking cleanup and simplifications, such as removing upgradeClient.

For Cosmos EVM integrations, this release adds ICS02PrecompileWrapper, which works with the cosmos/evm ICS02 precompile. This allows Solidity contracts to access ibc-go light clients through the precompile interface.

Several dependencies and development tools have also been updated, including OpenZeppelin Contracts, Foundry-related tooling, SP1, Solhint, NatSpec linting, formatting, and static analysis.

This is a pre-release intended for testing and integration feedback before the final v3.0.0 release. For the full changelog, see the section below.

What's Changed

• feat: add contract calls application by @srdtrk in #508
• test: added shadowfork testing by @srdtrk in #534
• chore: added natlint, a natspec linter by @srdtrk in #536
• imp(ethereum): remove deneb support by @srdtrk in #530
• imp: added a reference IBC-compatible ERC20 by @srdtrk in #539
• imp: use AccessManager for access control by @srdtrk in #554
• ci: add slither static analysis by @gjermundgaraba in #634
• chore: updated nix flakes to fix foundry by @srdtrk in #674
• chore: updated solhint to v6 and linted the repo by @srdtrk in #675
• chore: lint with new forge fmt by @srdtrk in #767
• imp(contracts): remove upgradeClient by @srdtrk in #776
• chore(contracts): lint with forge fmt by @srdtrk in #777
• chore: 'forge fmt' with 1.4.4 by @srdtrk in #807
• feat: added precompile light client for cosmos/evm by @srdtrk in #820
• imp(ics27): reverse lookup of AccountIdentifier by @srdtrk in #859
• feat: add attestation LC by @srdtrk in #861
• chore(docs): contracts readme by @ericHgorski in #866
• feat: implement IFT token standard in Solidity by @mariuszzak in #864
• test(e2e, ift): added test cases for IFT (Cosmos ↔ Evm + Cosmos ↔ Cosmos) by @mariuszzak in #876
• fix: validate receiver address in CosmosIFTSendCallConstructor by @srdtrk in #939
• feat(attestation): add domain separation to attestation light clients by @mariuszzak in #946
• chore: migrate sp1 from v5 to v6.1 by @mariuszzak in #952
• imp(contracts/ift): added nonReentrant to IFT functions by @srdtrk in #953
• imp(contracts/ics20): add more balance validation to permit2 transfers by @srdtrk in #954
• deps: update openzeppelin-contracts to v5.5.0 by @srdtrk in #955
• feat(solana): implement SolanaIFTSendCallConstructor by @mariuszzak in #959
• chore: dependency and linting updates by @srdtrk in #1028
• imp(ift): add authority gated mint and burn functions to reference implementations by @srdtrk in #1029

New Contributors

• @MozirDmitriy made their first contribution in #586
• @VolodymyrBg made their first contribution in #620
• @MamunC0der made their first contribution in #764
• @ericHgorski made their first contribution in #866
• @dependabot[bot] made their first contribution in #886
• @aljo242 made their first contribution in #895
• @bpiv400 made their first contribution in #950
• @dianab-cl made their first contribution in #1023

Full Changelog: solidity-v2.0.0...solidity-v3.0.0-rc.1