- Add keygen_session_id field to CreateSessionRequest and SessionInfo protobuf
- Modify CreateSigningSessionAuto to accept and pass keygenSessionID
- Update Account Handler to pass account's keygen_session_id when creating signing session
- This enables parties to load the correct keyshare by session ID
Created test_signing.go to test MPC signing functionality:
- Generates JWT token for authentication
- Creates SHA-256 hash of test message
- Calls POST /api/v1/mpc/sign API
- Tests signing with persistent parties (non-delegate mode)
Usage: go run test_signing.go
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
hailin