Use Cases

Purpose

Use cases orchestrate domain entities, repositories, and services while keeping controllers thin.

Main groups

• User: register/login/google login.
• Wallet: CRUD + membership changes.
• Category: CRUD.
• Transaction: CRUD + OCR + voice command.
• Budget: CRUD + sharing + invite response.
• Dashboard: analytics aggregation services.

Cross-module reuse

TransactionCreatorPort points to AddTransactionImpl, so AI flows create transactions through the same guarded path as manual API creation.

Internal snippet

container
  .bind<TransactionCreatorPort>(TYPES.TransactionCreatorPort)
  .toService(TYPES.AddTransactionImpl);

Source: backend/src/Containers/inversify.config.ts.