Salli keeps financial behavior on the device and separates deterministic domain logic from storage, native capabilities, and presentation.

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Core

Money wraps integer minor units. Wallet-currency helpers preserve native values and explicit LKR conversion evidence. Formatting occurs at the UI edge.

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Domain

Pure Dart entities and use cases implement:
  • transactions and analytics;
  • Safe to Spend and payday cycles;
  • budget rollover and insights;
  • seettu schedules;
  • reminder planning;
  • runway forecasts; and
  • local intelligence records.
Domain code does not depend on Flutter widgets or SQLite.

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Data

  • Drift tables and migrations.
  • SQLCipher device-store factory.
  • JSON personal backup and CSV export.
  • Android SMS gateway, parser, classifier, deduplication, and evidence queues.
  • Local merchant corpus and package validation.
  • Receipt image/OCR adapters.
  • Local notification adapters.
  • Reference exchange-rate adapter with minimized request fields.

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Application

Riverpod exposes one hydrated AppState and intent-style notifier methods. Writes are serialized through the store. Optimistic state updates keep screens reactive, while persistence tests verify restart hydration.

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Presentation

The shell uses an indexed stack for Home, Activity, Insights, and More. Standard Navigator routes open full screens; modal sheets handle focused editing and review. The Ledger theme supplies colors, typography, radii, spacing, and Android’s classic variant.

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Native Android

Kotlin components handle:
  • SMS_RECEIVED;
  • permission and inbox backfill channels;
  • background one-shot processing;
  • sender policy;
  • notification delivery;
  • reboot restoration; and
  • the home-screen widget.
Native code passes bounded data to Dart rather than duplicating financial logic.

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No production backend

Cloud sync, family sharing, billing, remote AI, and a signed corpus/template service are deferred. The current app has no backend dependency.