Meshtastic-Android/core/domain

:core:domain

Overview

The :core:domain module is the business-logic layer of the KMP architecture. It contains exclusively use-case classes — no UI, no platform code, no mutable state. Each use case is a thin orchestrator that coordinates one or more repository/model dependencies to fulfil a single application action.

Targets: Android · JVM · iOS (via meshtastic.kmp.library convention plugin)

Key Responsibilities

• Orchestrate radio configuration reads/writes (config, module config, channels, owner, position)
• Manage remote-admin session lifecycle (per-node passkey negotiation)
• Application settings toggles (theme, locale, analytics, notifications, location sharing)
• Data export (CSV mesh log, profile .zip, security config)
• Profile and config import/install
• Node database maintenance (clean, reset, selective purge)

Source Structure

src/commonMain/kotlin/org/meshtastic/core/domain/
├── di/
│   └── CoreDomainModule.kt          ← Koin @Module + component scan
└── usecase/
    ├── session/
    │   ├── EnsureRemoteAdminSessionUseCase.kt
    │   ├── EnsureSessionResult.kt
    │   └── ObserveRemoteAdminSessionStatusUseCase.kt
    └── settings/
        ├── AdminActionsUseCase.kt
        ├── CleanNodeDatabaseUseCase.kt
        ├── ExportDataUseCase.kt
        ├── ExportProfileUseCase.kt
        ├── ExportSecurityConfigUseCase.kt
        ├── ImportProfileUseCase.kt
        ├── InstallProfileUseCase.kt
        ├── IsOtaCapableUseCase.kt
        ├── ProcessRadioResponseUseCase.kt
        ├── RadioConfigUseCase.kt
        ├── SetAppIntroCompletedUseCase.kt
        ├── SetDatabaseCacheLimitUseCase.kt
        ├── SetLocaleUseCase.kt
        ├── SetMeshLogSettingsUseCase.kt
        ├── SetNotificationSettingsUseCase.kt
        ├── SetProvideLocationUseCase.kt
        ├── SetThemeUseCase.kt
        ├── ToggleAnalyticsUseCase.kt
        └── ToggleHomoglyphEncodingUseCase.kt

Notable APIs

EnsureRemoteAdminSessionUseCase

Ensures a per-node remote-admin passkey session exists before entering the remote admin UI. Uses a Mutex-guarded inFlight map so that double-taps coalesce onto a single Deferred.

sealed interface EnsureSessionResult {
    data object AlreadyActive   : EnsureSessionResult  // passkey already fresh
    data object Refreshed       : EnsureSessionResult  // metadata response arrived
    data object Timeout         : EnsureSessionResult  // no response within 10 s
    data object Disconnected    : EnsureSessionResult  // radio not connected
}

RadioConfigUseCase

Radio configuration read/write operations, all returning the packetId for async tracking:

Method	Description
setOwner / getOwner	Node owner info
setConfig / getConfig	Config proto (device, position, power, …)
setModuleConfig / getModuleConfig	ModuleConfig proto
getChannel / setRemoteChannel	Channel configuration
setFixedPosition / removeFixedPosition	Fixed GPS position
setRingtone / getRingtone	External notification ringtone
setCannedMessages / getCannedMessages	Canned message slots

AdminActionsUseCase

reboot(destNum)
shutdown(destNum)
factoryReset(destNum, isLocal)   // also clears local NodeDB when isLocal = true
nodedbReset(destNum, preserveFavorites, isLocal)

ExportDataUseCase

Streams all mesh log packets to a CSV BufferedSink. Columns: date, time, from, sender name/location, received location/elevation, SNR, distance, hop limit, payload.

Dependency Graph

core:domain
  ├── core:repository   (use-case interfaces & contracts)
  ├── core:model        (domain models)
  ├── core:proto        (Meshtastic protobuf types)
  ├── core:common
  ├── core:database
  ├── core:datastore
  └── core:resources

DI

All use cases are registered via Koin component scan on org.meshtastic.core.domain. No manual binding is needed — annotate a new use case with @Single and it is picked up automatically.

Dependency Graph

graph TB
  :core:domain[domain]:::kmp-library
  :core:domain -.-> :core:repository
  :core:domain -.-> :core:model
  :core:domain -.-> :core:proto
  :core:domain -.-> :core:common
  :core:domain -.-> :core:database
  :core:domain -.-> :core:datastore
  :core:domain -.-> :core:resources
  :core:domain -.-> :core:testing

classDef android-application fill:#CAFFBF,stroke:#000,stroke-width:2px,color:#000;
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;