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- Track infrastructure nodes (ROUTER, ROUTER_LATE, CLIENT_BASE roles) in DiscoveredNodeEntity and DiscoveryPresetResultEntity - Add markInterruptedSessions() DAO query for cold-start recovery - Add usesDefaultKey StateFlow to DiscoveryViewModel that checks primary channel PSK and disables scan when using default/cleartext key - Wire default key guard into ScanButton with accessibility description - Add discovery_start_scan_reason_default_key string resource - Update all test DAO fakes with KMP-compatible implementations Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
:core:database
This module provides the local Room database persistence layer for the application using Room Kotlin Multiplatform (KMP).
Key Components
MeshtasticDatabase: The main Room database class, defined incommonMain.- DAOs (Data Access Objects):
NodeInfoDao: Manages storage and retrieval of node information (NodeEntity). Contains critical logic for handling Public Key Conflict (PKC) resolution and preventing identity wiping attacks.PacketDao: Handles storage of mesh packets, including text messages, waypoints, and reactions.
- Entities:
NodeEntity: Represents a node on the mesh.Packet: Represents a stored packet.ReactionEntity: Represents emoji reactions to packets.
Security Considerations
Public Key Conflict (PKC) Handling
The NodeInfoDao implements specific logic to protect against impersonation and "wipe" attacks:
- Wipe Protection: Receiving an
is_licensed=truepacket (which normally clears the public key for compliance) will not clear an existing valid public key if one is already known. This prevents attackers from sending fake licensed packets to wipe keys from the DB. - Conflict Detection: If a new key arrives for an existing node ID that conflicts with a known valid key, the key is set to
ERROR_BYTE_STRINGto flag the potential impersonation.
Module dependency graph
graph TB
:core:database[database]:::kmp-library
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classDef android-application-compose fill:#CAFFBF,stroke:#000,stroke-width:2px,color:#000;
classDef compose-desktop-application fill:#CAFFBF,stroke:#000,stroke-width:2px,color:#000;
classDef android-feature fill:#FFD6A5,stroke:#000,stroke-width:2px,color:#000;
classDef android-library fill:#9BF6FF,stroke:#000,stroke-width:2px,color:#000;
classDef android-library-compose fill:#9BF6FF,stroke:#000,stroke-width:2px,color:#000;
classDef android-test fill:#A0C4FF,stroke:#000,stroke-width:2px,color:#000;
classDef jvm-library fill:#BDB2FF,stroke:#000,stroke-width:2px,color:#000;
classDef kmp-feature fill:#FFD6A5,stroke:#000,stroke-width:2px,color:#000;
classDef kmp-library-compose fill:#FFC1CC,stroke:#000,stroke-width:2px,color:#000;
classDef kmp-library fill:#FFC1CC,stroke:#000,stroke-width:2px,color:#000;
classDef unknown fill:#FFADAD,stroke:#000,stroke-width:2px,color:#000;