Refactoring

[anhthii]

Changelog

Added

• AES-GCM utility functions in pkg/encryption/aes.go:
  • EncryptAESGCMWithNonceEmbed – encrypts plaintext and embeds nonce in ciphertext.
  • DecryptAESGCMWithNonceEmbed – decrypts ciphertext with embedded nonce.
• ECDH key exchange support in pkg/mpc/key_exchange_session.go and pkg/types/ecdh.go with session management, error handling, and message flow.
• Party ID utilities in pkg/mpc/party_id.go for better ID and committee peer handling.
• .gitignore updated to exclude generated config files and node directories (node0, node1, node2, config.yaml).

Changed

• Node startup sequence (cmd/mpcium/main.go):
  • Added ECDH key exchange before starting consumers.
  • Added error monitoring for ECDH session.
  • Improved context cancellation handling and graceful shutdown.
• Resharing sessions:
  • Renamed GetExtraPeerIDs → GetLegacyCommitteePeers in ECDSA/EdDSA sessions for clarity.
  • Updated consumer logic in pkg/eventconsumer/event_consumer.go to use new naming and behavior (ListenToPeersAsync).
• Identity encryption (pkg/identity/identity.go):
  • Removed inline AES-GCM encryption/decryption.
  • Switched to new EncryptAESGCMWithNonceEmbed / DecryptAESGCMWithNonceEmbed from pkg/encryption.
• Messaging comments clarified in pkg/messaging/point2point.go.
• Keygen consumer logs standardized to lowercase “keygen” for consistency.

Removed

• Legacy AES-GCM functions encryptAEAD and decryptAEAD from pkg/identity/identity.go.
• Unused TSS-related types and tests (pkg/types/tss.go, pkg/types/tss_test.go).
• Old inline test and node setup code in pkg/mpc/node_test.go and pkg/mpc/node.go.