Commit Graph

8 Commits

Author SHA1 Message Date
hailin 99ff3ac130 fix(server-party): use parent context in event handler for proper cancellation
- Fixed server-party event handler to use parent context with timeout
- Prevents orphan goroutines when session fails or party exits
- Consistent with server-party-api fix
2025-12-06 06:39:23 -08:00
hailin aa74e2b2e2 feat(mpc-system): add signing parties configuration and delegate signing support
- Add signing-config API endpoints (POST/PUT/DELETE/GET) for configuring
  which parties should participate in signing operations
- Add SigningParties field to Account entity with database migration
- Modify CreateSigningSession to use configured parties if set,
  otherwise use all active parties (backward compatible)
- Add delegate party signing support: user provides encrypted share
  at sign time for delegate party to use
- Update protobuf definitions for DelegateUserShare in session events
- Add ShareTypeDelegate to support hybrid custody model

API endpoints:
- POST /accounts/:id/signing-config - Set signing parties (first time)
- PUT /accounts/:id/signing-config - Update signing parties
- DELETE /accounts/:id/signing-config - Clear config (use all parties)
- GET /accounts/:id/signing-config - Get current configuration

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Co-Authored-By: Claude <noreply@anthropic.com>
2025-12-05 22:47:55 -08:00
hailin 135e821386 feat(mpc-system): integrate reliability mechanisms and enable party-driven architecture
- Enable SubscribeSessionEvents for automatic session participation
- Integrate heartbeat mechanism with pending message count
- Add ACK sending after message receipt for reliable delivery
- Add party activity tracking in session coordinator
- Add CountPendingByParty for heartbeat response
- Add retry package with exponential backoff for gRPC clients
- Add memory-based message broker and event publisher adapters
- Add account service integration for keygen completion
- Add party timeout checking background job
- Add notification service stub for future implementation

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Co-Authored-By: Claude <noreply@anthropic.com>
2025-12-05 20:30:03 -08:00
hailin d7f181f2ec feat(mpc-system): implement delegate party for hybrid custody
- Add ShareForUser field to ParticipateKeygenOutput
- Implement role-based share handling (persistent/delegate/temporary)
- Add in-memory share cache with 15-minute TTL for delegate parties
- Add GET /api/v1/sessions/:session_id/user-share endpoint for one-time share retrieval
- Shares from delegate parties are NOT saved to database
- Add comprehensive Delegate Party implementation guide

This implements hybrid custody model similar to Fireblocks and ZenGo:
- Persistent parties: shares stored in server database
- Delegate parties: shares returned to user, deleted from memory after retrieval

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2025-12-05 09:07:46 -08:00
hailin c976fd3eb1 feat(mpc-system): implement party-driven architecture with SessionEvent broadcasting
Fully implemented party-driven architecture according to international standards (Fireblocks, ING Bank, ZenGo patterns):

**Architecture Changes:**
- Parties actively connect to Message Router (not passively called by coordinator)
- Session Coordinator publishes SessionEvents when creating sessions
- Parties automatically subscribe and respond to SessionEvents
- PartyID-based routing instead of network addresses

**New Features:**
1. Session Coordinator → Message Router gRPC Client
   - PublishSessionEvent RPC for broadcasting session lifecycle events
   - Automatic event publishing after session creation

2. Message Router SessionEvent Broadcasting
   - SubscribeSessionEvents RPC for party subscriptions
   - PublishSessionEvent RPC for coordinator publishing
   - Targeted broadcasting to selected parties

3. Server-Party Auto-Registration & Subscription
   - RegisterParty on startup with role (persistent/delegate/temporary)
   - SubscribeSessionEvents for automatic session notifications
   - Event handler for automatic MPC participation

**Files Modified:**
- api/proto/message_router.proto: Added SessionEvent messages and RPCs
- services/message-router/adapters/input/grpc/message_grpc_handler.go: PublishSessionEvent handler
- services/session-coordinator/adapters/output/grpc/message_router_client.go: NEW - gRPC client
- services/session-coordinator/application/use_cases/create_session.go: SessionEvent publishing
- services/session-coordinator/cmd/server/main.go: Message Router client initialization
- services/server-party/adapters/output/grpc/message_router_client.go: RegisterParty + SubscribeSessionEvents
- services/server-party/cmd/server/main.go: Party registration and event subscription (commented pending full integration)
- go.mod/go.sum: Updated grpc to v1.77.0

**Technical Details:**
- gRPC streaming for SessionEvent subscriptions
- Non-blocking channel broadcasts prevent slow subscribers from blocking
- PartyRole support (persistent/delegate/temporary)
- Join tokens distributed via SessionEvent

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Co-Authored-By: Claude <noreply@anthropic.com>
2025-12-05 08:44:05 -08:00
hailin 747e4ae8ef refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing
- Remove Address field from PartyEndpoint (parties connect to router themselves)
- Update K8s Discovery to only manage PartyID and Role labels
- Add Party registration and SessionEvent protobuf definitions
- Implement PartyRegistry and SessionEventBroadcaster domain logic
- Add RegisterParty and SubscribeSessionEvents gRPC handlers
- Prepare infrastructure for party-driven MPC coordination

This is the first phase of migrating from coordinator-driven to party-driven
architecture following international MPC system design patterns.
2025-12-05 08:11:28 -08:00
Developer 79ccdd7116 feat: Complete MPC TSS implementation with t-of-n threshold signing
Major changes:
- Add TSS core library (pkg/tss) with keygen and signing protocols
- Implement gRPC clients for Server Party service
- Add MPC session endpoints to Account service
- Deploy 3 Server Party instances in docker-compose
- Add MarkPartyReady and StartSession to proto definitions
- Complete integration tests for 2-of-3, 3-of-5, 4-of-7 thresholds
- Add comprehensive documentation (architecture, API, testing, deployment)

Test results:
- 2-of-3: PASSED (keygen 93s, signing 80s)
- 3-of-5: PASSED (keygen 198s, signing 120s)
- 4-of-7: PASSED (keygen 221s, signing 150s)

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Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-29 06:57:53 -08:00
Developer 75226ce097 feat: Complete production deployment configuration
- Add config.example.yaml with all configuration options documented
- Add server-party service main.go with HTTP endpoints
- Fix message-router gRPC handler registration
- All services now buildable and deployable via docker-compose

Test results:
- Unit tests: 3/3 PASS
- Integration tests: 26/26 PASS
- E2E tests: 8/8 PASS
- Docker build: All 4 services built successfully

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Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-29 04:10:06 -08:00