Payjoin Dev Kit Release 1.0.0-rc.7

This release changes how the receiver's ownership guard identifies a coin, so check_inputs_not_owned now takes a closure over &OutPoint rather than &Script. This is a breaking change for receiver implementations. It also hardens Original PSBT validation, unifies the BIP 77 mailbox derivation, and expands the receiver interface documentation.

Selected Improvements:

API Changes

• Breaking: check_inputs_not_owned takes

&mut impl FnMut(&OutPoint) -> Result<bool, ImplementationError> in place of a closure over &Script. The closure must answer for every outpoint the wallet can sign

• ShortId implements From<&HpkePublicKey>, giving sender and receiver a

single BIP 77 mailbox derivation instead of two copies of the same hash (#1763)

Bug Fixes

• Harden Original PSBT input validation and the proposal finalization checks

Documentation

• Revise and expand the receiver interface documentation across the v1 and v2

state machines (#1710)

What's Changed

• Update setuptools to 83.0.0 by @benalleng in https://github.com/payjoin/rust-payjoin/pull/1768
• Unify mailbox ShortId derivation by @Jolah1 in https://github.com/payjoin/rust-payjoin/pull/1763
• Expose PjParam::receiver_pubkey() over FFI by @DanGould in https://github.com/payjoin/rust-payjoin/pull/1771
• Add and Revise Receiver Interface Comments by @xstoicunicornx in https://github.com/payjoin/rust-payjoin/pull/1710
• Add comments to FFI interface by @xstoicunicornx in https://github.com/payjoin/rust-payjoin/pull/1653
• Automate crates.io releases by @spacebear21 in https://github.com/payjoin/rust-payjoin/pull/1770
• Add dangould release signing key by @DanGould in https://github.com/payjoin/rust-payjoin/pull/1777
• Add benalleng release signing key by @benalleng in https://github.com/payjoin/rust-payjoin/pull/1778
• Remove output substitution test helper by @lntutor in https://github.com/payjoin/rust-payjoin/pull/1775
• Bump payjoin to version 1.0.0-rc.7 by @spacebear21 in https://github.com/payjoin/rust-payjoin/pull/1782

New Contributors

• @Jolah1 made their first contribution in https://github.com/payjoin/rust-payjoin/pull/1763
• @lntutor made their first contribution in https://github.com/payjoin/rust-payjoin/pull/1775

Full Changelog: https://github.com/payjoin/rust-payjoin/compare/payjoin-cli-1.0.0-rc.1...payjoin-1.0.0-rc.7