Changelog

Unreleased

Project renamed from Shackle to Shain. PDA seeds now use the shain_* prefix. All SDK exports, public surfaces and cross-verify files updated. Program key rotated.

[0.4.1] — 2026-04-16

Fixed

• Refund rent correctly when closing sessions that were opened and re-opened multiple times by the same signer.
• Guard start_session against double-open when the previous session is still within its expiry window.

[0.4.0] — 2026-03-28

Added

• gated_action(tag) instruction. Dapps can gate a downstream CPI behind an active session using any u64 tag for instrumentation.
• close_session() instruction — anyone can close an expired session and return rent to the original owner.
• Workspace-level Cargo manifest with centralized dependency versions.

Changed

• Bumped Anchor to 1.0.0 and Solana toolchain to 3.1.x.
• Moved from raw SPL transfer CPI to anchor_spl::token::Transfer.

[0.3.0] — 2026-02-15

Added

• initialize(params) accepts optional overrides for session duration, fee, and minimum holding.
• ShainConfig tracks lifetime total_sessions and total_fees_collected.

Fixed

• Session PDA derivation now uses the full user pubkey instead of only the first 16 bytes.

[0.2.0] — 2026-01-10

Added

• First working start_session() instruction. Charges the session fee and records expiry.
• 9 integration tests covering happy paths and the main failure modes.

[0.1.0] — 2025-12-02

Added

• Initial scaffolding generated by anchor init.
• ShainConfig and ShainSession account definitions.
• Basic initialize() instruction that writes the config PDA.