[!CAUTION]
This release includes a database migration for the mint. Ensure you back up your database before upgrading your Nutshell instance to avoid data loss.

Keysets V2
Nutshell is now using the new keyset V2 format which due to its larger size prevents keyset ID collisions.
Notable changes
Mint

management CLI improvements
database optimizations
USD support for Blink backend

Wallet

create P2PK locked tokens with timelock and refund pubkey

Other

improve testing pipeline
legacy API cleanups
updated NUT-21 and NUT-22 matching rules

What's Changed

chore: verify version consistency in build workflows by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/897
fix: use -- before quote ID in management CLI tests by @b-l-u-e in https://github.com/cashubtc/nutshell/pull/912
Chore: ci modernize workflows by @b-l-u-e in https://github.com/cashubtc/nutshell/pull/911
fix: enable sqlite wal mode by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/908
feat(wallet): add 'lock p2pk' CLI command with --timelock and --refund by @ritoban23 in https://github.com/cashubtc/nutshell/pull/914
feat: keysets v2 by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/798
feat(lightning): add USD (Stablesats) support for Blink backend by @Forte11Cuba in https://github.com/cashubtc/nutshell/pull/869
docs: add AGENTS.md for AI/agent workflow guidance by @ye0man in https://github.com/cashubtc/nutshell/pull/917
Remove deprecated promises field from PostRestoreResponse by @coldbrewnosugar in https://github.com/cashubtc/nutshell/pull/900
fix: support both padded and unpadded base64url in AuthProof (NUT-22) by @KvngMikey in https://github.com/cashubtc/nutshell/pull/920
fix: prevent P2PK case-bypass by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/923
fix: add greenlet as an explicit dependency by @wqxoxo in https://github.com/cashubtc/nutshell/pull/913
ci: upload test results to codecov by @callebtc in https://github.com/cashubtc/nutshell/pull/947
fix(wallet): skip mpp test for LNbits in regtest by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/948
test(mint): add tests for gRPC server functions in management_rpc by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/943
tests: Increase test coverage by @callebtc in https://github.com/cashubtc/nutshell/pull/949
Remove paid & issued field in MintQuote by @KvngMikey in https://github.com/cashubtc/nutshell/pull/838
fix: use row lock select statements by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/906
feat: protected endpoint wildcard matching rules by @robwoodgate in https://github.com/cashubtc/nutshell/pull/885
Issue 789. Avoid the duplication of websocket messages that failed that test by @aaronmcdaid in https://github.com/cashubtc/nutshell/pull/790
Add GetQuoteTtl Method to Management RPC by @KvngMikey in https://github.com/cashubtc/nutshell/pull/874
feat: add fuzzing infrastructure and tests by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/864
fix: set/unset melt quote and associated proofs in same transaction by @a1denvalu3 in https://github.com/cashubtc/nutshell/pull/880
fix restore_promises derivation-path mismatch on subset restores by @b-l-u-e in https://github.com/cashubtc/nutshell/pull/901
feat: proxy-aware rate limiting with sane defaults by @asoltys in https://github.com/cashubtc/nutshell/pull/910
fix(mint): validate P2PK/HTLC sigflags and refactor verify_inputs_and_outputs by @callebtc in https://github.com/cashubtc/nutshell/pull/959

New Contributors

@ritoban23 made their first contribution in https://github.com/cashubtc/nutshell/pull/914
@Forte11Cuba made their first contribution in https://github.com/cashubtc/nutshell/pull/869
@ye0man made their first contribution in https://github.com/cashubtc/nutshell/pull/917
@coldbrewnosugar made their first contribution in https://github.com/cashubtc/nutshell/pull/900
@wqxoxo made their first contribution in https://github.com/cashubtc/nutshell/pull/913
@robwoodgate made their first contribution in https://github.com/cashubtc/nutshell/pull/885
@aaronmcdaid made their first contribution in https://github.com/cashubtc/nutshell/pull/790
@asoltys made their first contribution in https://github.com/cashubtc/nutshell/pull/910

Full Changelog: https://github.com/cashubtc/nutshell/compare/0.19.2...0.20.0