{"info":{"_postman_id":"9ae34033-c36d-4398-94b3-64ae02c3e7ae","name":"NG Cash API","description":"

📌 Sobre o Projeto

API backend desenvolvida para simular um sistema bancário simplificado, com autenticação de usuários, consulta de saldo e registro de transações financeiras.

O sistema garante:

Criação automática de conta ao cadastrar usuário
\n
Validação de saldo antes de transferências
\n
Registro histórico de transações
\n
Proteção de rotas via autenticação JWT
\n

O projeto foi estruturado utilizando arquitetura em camadas:

Controller → Business → Data → Services

Com separação clara de responsabilidades e tratamento de erros customizados.

🛠 Tecnologias Utilizadas

Node.js
\n
TypeScript
\n
Express
\n
PostgreSQL
\n
Knex
\n
JWT (autenticação)
\n
Bcrypt (hash de senha)
\n
Postman (testes de API)
\n

🏗 Arquitetura

O projeto segue o padrão de separação em camadas:

Controller: Responsável por receber requisições HTTP e retornar respostas.
\n
Business: Contém as regras de negócio e validações.
\n
Data: Comunicação com o banco de dados.
\n
Services: Autenticação e criptografia.
\n
Error: Tratamento de erros personalizados.
\n

🔐 Autenticação

A API utiliza autenticação via JWT.

Após o login, o token retornado deve ser enviado no header:

Authorization: Bearer {token}

💰 Regra de Negócio Principal

Cada usuário possui uma conta associada.
\n
Transferências só são realizadas se houver saldo suficiente.
\n
O sistema impede saldo negativo.
\n
Todas as transações são registradas com data e hora.
\n

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