Intended for:

• registration of debt deals between many people;
• quick retrieval of up-to-date due debts and statistics.

Each person can both lend and borrow.

Currently usable by single data entry operator, but has partial support for concurrent use.

• people:
  • person: id, name, surname
• debts:
  • debt deals
    • deal: id, time, giverId, takerId, amount
    • credits
    • paybacks
  • person:
    • totals:
      • total amount historically credited by person
      • total amount historically owed by person
      • total count of credits taken
    • statistics:
      • person's average historical debt through cases of borrowing
    • fraction of repaid debts
  • pair:
    • current debt
  • achievers:
    • who historically credited max total
    • with max due debts total
    • best debtor by repaid fraction then total

• implement asynchronous API methods
• finish with concurrency control - either using shared serializer or optimistic concurrency control
• improve DI, make more tests etc. (see info/TODOs.txt)

Dependency injection, transactions, code-first tables database, in-memory databases for testing.

MS Entity Framework Core, MongoDB, xUnit.

For easier, but still detailed overview of code structure, see mindmap file info/DebtsRegister structure.xmind.