Overview

This project is a solution for the Woovi Challenge, which involves building a simple CRUD (Create, Read, Update, Delete) application for a bank. The implementation utilizes the specified stack and technologies, closely mirroring day-to-day operations at Woovi.

Stack

Backend

• Node.js
• Koa.js
• MongoDB
• GraphQL

Frontend

• React
• Relay

Testing

• Vitest

Features

• User Registration and Login:

  • Register a new user with a first name, tax ID (CPF/CNPJ), and encrypted password.
  • Unique tax ID enforcement to prevent duplicate registrations.
  • Login mutation with JWT token authentication.

• Account Management:

  • Create a user account with a unique account number.
  • Ensure one account per user.
  • Calculate account balance using a ledger strategy.

• Transactions:

  • Send and receive transactions between accounts.
  • Idempotent transaction handling to prevent duplicates.
  • Track sender and receiver details and transaction value.