v6.0.0-alpha.3

Version 6.0.0-alpha.3

Here's how you can use this release:

cargo install --force --locked --git https://github.com/use-ink/cargo-contract --tag v6.0.0-alpha.3

ink = { git = "https://github.com/use-ink/ink.git", tag = "v6.0.0-alpha.3", default-features = false, features = ["unstable-hostfn"] }
ink_e2e = { git = "https://github.com/use-ink/ink.git", tag = "v6.0.0-alpha.3", default-features = false }

You also need to install the latest ink-node release (there are binaries available for this release!).

Compatibility:

• Rust >= 1.88
• cargo-contract v6.0.0-alpha.3
• ink-node v0.45.1
• polkadot-sdk from use-ink/polkadot-sdk/a71ec19a94702ea71767ba5ac97603ea6c6305c1
• Passet Hub (was upgraded on Sep 12, 2025)

We have to use a slight fork of polkadot-sdk for the moment. It's just polkadot-sdk/master plus two
commits on top with pre-compiles. Those two commits are PRs to polkadot-sdk that haven't been merged yet, but should be any day now.

Added

• Support functions of the Storage and System pre-compiles ‒ 2619

Changed

• Synchronize with polkadot-sdk/c40b36c3a7c208f9a6837b80812473af3d9ba7f7 ‒ 2589
• Synchronize with polkadot-sdk/a71ec19a94702ea71767ba5ac97603ea6c6305c1 ‒ 2619
• Refactor multi ABI interfaces - #2618
• Upgrade to Rust edition 2024 - #2624

Removed

• Removed functionalities around calling into the runtime and chain extensions ‒ 2621
• Remove Environment::MAX_EVENT_TOPICS and remove Environment generic type from event abstractions - #2622

Fixed

• E2E: Fixes around correct handling of storage deposit limit ‒ #2589
• Make NativeToEthRatio part of the Environment ‒ #2604
• E2E: Fix ink_sandbox gating - #2626