cashubtc/cdk v0.16.0-rc.1

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0.16.0

Summary

Version 0.16.0 introduces NUT-28 (Pay-to-Blinded-Key) and NUT-29 (Batch Minting) as significant protocol enhancements. This release also brings BIP-321 (Bitcoin Payment Requests) support and BIP-353 resolution in the CLI. A major architectural refinement introduces the WalletTrait, unifying core and FFI wallet implementations.

Key highlights include:

• NUT-28 (Pay-to-Blinded-Key): Privacy-enhancing P2PK variant that blinds keys before spending.
• NUT-29 (Batch Minting): Support for batching mint quotes for improved efficiency.
• BIP-321 Support: Complete parsing and creation of Bitcoin payment requests (BIP-321).
• WalletTrait: Unified abstraction for all wallet types, simplifying integrations and FFI bindings.
• Improved WASM Support: Refactored WebSocket client and time handling for better browser compatibility.
• CLI Enhancements: BIP-353 resolution, NUT-26 PR support, and improved mint management commands.

Added

• cdk: NUT-29 Batch Minting support (#1698) ([thesimplekid]).
• cdk: NUT-28 Pay-to-Blinded-Key (P2BK) support (#1253, #1729) ([lollerfirst]).
• cdk: BIP-321 (Bitcoin Payment Requests) parsing and creation (#1716) ([thesimplekid]).
• cdk: WalletTrait shared between core and FFI wallets for improved architectural consistency (#1581) ([crodas]).
• cdk: WASM-compatible WebSocket client abstraction (#1615) ([crodas]).
• cdk: Added inactive/expired keysets to MintBuilder ([crodas]).
• cdk: Added config_unit to MintBuilder (#1659) ([thesimplekid]).
• cdk: Added get_mint_quotes to the mint database trait (#1689) ([thesimplekid]).
• cdk: Added MacOS builds to the automated release process (#1702) ([thesimplekid]).
• cdk: Subscribe to mint quote state changes in FFI bindings (#1725) ([Forte11Cuba]).
• cdk: Add to_bech32_string to FFI (#1712) ([thesimplekid]).
• cdk: Store Nostr payment request information (#1732) ([thesimplekid]).
• cdk: Add keys and mint info to mock connector for testing (#1727) ([thesimplekid]).
• cdk-cli: BIP-353 human-readable address resolution (#1739) ([thesimplekid]).
• cdk-cli: NUT-26 Payment Request CLI subcommands (#1731) ([thesimplekid]).
• cdk-cli: Recover from incomplete saga command (#1674) ([thesimplekid]).
• cdk-mintd: Home page and footer with custodial information (#1760, #1771) ([thesimplekid]).
• cdk-mintd: Add expose_private_channels configuration for CLN backend (#1758) ([4xvgal]).

Changed

• cdk: BREAKING - Unified melt and melt_async logic in the mint implementation (#1715) ([0xEgao]).
• cdk: BREAKING - NUT-18 payment requests now use Vec<T> instead of Option<Vec<T>> for better consistency (#1664) ([Forte11Cuba]).
• cdk: Upgraded redb to version 3.0.0 (#1672) ([thesimplekid]).
• cdk: Align signatory keyset derivation with the remote signer specification (#1257) ([lescuer97]).
• cdk: For mint quotes, use enum for mint connector selection (#1708) ([thesimplekid]).
• cdk: Replaced TryFrom<MeltQuote> with a direct OutgoingPaymentOptions function for cleaner API (#1724) ([TheMhv]).
• cdk: Use amount with unit in gRPC communication (#1616) ([thesimplekid]).
• cdk: Remove default features of hyper-rustls to reduce binary size and dependencies (#1768) ([thesimplekid]).
• cdk: Static release builds for all platforms (#1683) ([thesimplekid]).
• cdk: Tor service default configuration (#1449) ([gandlafbtc]).
• cdk: Inject version header at client level instead of per request (#1766) ([Forte11Cuba]).
• cdk: Moved spending conditions implementation to nut10 module for better organization (#1714) ([TheMhv]).

Fixed

• cdk: Auth token (NUT-22) no longer requires base64 padding for better compatibility (#1755) ([crodas]).
• cdk: Wallet restore now scans all keysets, including inactive ones, to prevent missed funds (#1753) ([crodas]).
• cdk: Correctly filter sagas and quotes by wallet unit and mint URL (#1759) ([thesimplekid]).
• cdk: Ensure extra_json is persisted on mint_quotes in SQL backends (#1742) ([vnprc]).
• cdk: Publish pubsub notifications only after successful transaction commit ([thesimplekid]).
• cdk: Allow denomination reuse in amount split for restricted keysets (#1676) ([thesimplekid]).
• cdk: Compensate for failed sagas in the mint to ensure consistency (#1675) ([thesimplekid]).
• cdk: Fixed saga proof reservation in the wallet to prevent accidental spending during pending operations (#1728) ([thesimplekid]).
• cdk: Pass currency unit through protobuf instead of hardcoding Msat in MakePayment (#1673) ([crodas]).
• cdk: Fixed wallet validation for impossible multisig and refund configurations (#1711) ([ritoban23]).
• cdk: Handle WASM compatibility in WebSocket client and time handling (#1615, #1662) ([crodas]).
• cdk-mint-rpc: Added missing version header to all mint RPC CLI subcommands (#1764) ([thesimplekid]).

Removed

• cdk: Remove output_already_signed (#1690) ([thesimplekid]).
• cdk: Remove redundant unit field from get_payment_quote (#1704) ([thesimplekid]).
• cdk: Remove deprecated promises field from RestoreResponse (#1663) ([Forte11Cuba]).

New Contributors

• @Forte11Cuba made their first contribution in #1663
• @TheMhv made their first contribution in #1696
• @ritoban23 made their first contribution in #1711
• @0xEgao made their first contribution in #1715
• @4xvgal made their first contribution in #1758

Full Changelog: v0.15.1...v0.16.0-rc.0