27.0.0-rc.1

What's Changed

New Features

• CAP-71 — Auth delegation for custom accounts — Adds support for delegating a custom account's __check_auth to another address. CustomAccount::delegate_auth hands authorization to a G- or C-address that performs the actual authentication logic, and CustomAccount::get_delegated_signers returns the delegated signers supplied in the transaction's authorization payload for verification. (#1896)

Improvements

• Zero-copy BytesN::from for [u8; N] — BytesN::from now uses BytesN::to_array instead of allocating, avoiding extra memory allocation and significantly reducing CPU cost on conversions (up to ~80% on larger arrays in end-to-end benchmarks). (#1888)

All Changes

• Update bytes-lit to 0.0.6 by @leighmcculloch in #1882
• Delete .github/workflows/claude-review.yml by @leighmcculloch in #1887
• Test BytesN into [u8; N] conversions by @leighmcculloch in #1889
• Zero Copy improvement: BytesN::from to use BytesN::to_array by @dkcumming in #1888
• Pin transitive sdk crates to local version in CI by @mootz12 in #1902
• Document wasm32v1-none as supported target by @leighmcculloch in #1900
• Update crate-git-revision to 0.0.9 by @leighmcculloch in #1909
• Update SDK to p27 and add CAP-71 auth delegation support. by @dmkozh in #1896
• Add migration docs for functional changes to cfg attributes and export args by @mootz12 in #1886
• Bump version to 27.0.0-rc.1 by @github-actions[bot] in #1912

Full Changelog: v26.1.0...v27.0.0-rc.1