Bank API

This project is a simple bank API built using Go, Echo framework, and PostgreSQL. The API supports user authentication, account management, and transaction operations, including deposits, withdrawals, transfers, and fetching account history with pagination.

Features

• User Authentication (Signup, Login)
• Account Management (Deposit, Withdraw, Transfer)
• Transaction History with Pagination
• Secure Access to Accounts

Tech Stack

• Go
• Echo framework
• PostgreSQL
• GORM
• JWT for authentication

Setup

Prerequisites

• Go (version 1.16+)
• Docker
• Docker Compose

Running the Application

1. Clone the repository:

   git clone https://github.com/yourusername/bank-api.git
   cd bank-api
   

2. Create a .env file with the following environment variables:

   DB_HOST=db
   DB_USER=postgres
   DB_PASSWORD=postgres
   DB_NAME=bank
   JWT_SECRET=your_jwt_secret
   

3. Run Docker Compose to start PostgreSQL:

   docker-compose up -d
   

4. Run the application:

   go run main.go
   

API Endpoints

Authentication

• Signup:

  • URL: /signup
  • Method: POST
  • Body:

    {
        "username": "testuser",
        "password": "testpassword"
    }
    

• Login:

  • URL: /login
  • Method: POST
  • Body:

    {
        "username": "testuser",
        "password": "testpassword"
    }
    

Account Operations

• Deposit:

  • URL: /deposit
  • Method: POST
  • Headers: Authorization: Bearer <jwt_token>
  • Body:

    {
        "account_id": 1,
        "amount": 100.0
    }
    

• Withdraw:

  • URL: /withdraw
  • Method: POST
  • Headers: Authorization: Bearer <jwt_token>
  • Body:

    {
        "account_id": 1,
        "amount": 50.0
    }
    

• Transfer:

  • URL: /transfer
  • Method: POST
  • Headers: Authorization: Bearer <jwt_token>
  • Body:

    {
        "from_account_id": 1,
        "to_account_id": 2,
        "amount": 25.0
    }
    

Transaction History

• Get Account History:

  • URL: /account/:account_id/history
  • Method: GET
  • Headers: Authorization: Bearer <jwt_token>
  • Query Parameters:
    • page: Page number (default: 1)
    • limit: Number of transactions per page (default: 10)

• Get Transfer History:

  • URL: /account/:account_id/transfer-history
  • Method: GET
  • Headers: Authorization: Bearer <jwt_token>
  • Query Parameters:
    • page: Page number (default: 1)
    • limit: Number of transactions per page (default: 10)

Postman Collection

You can import the Postman collection provided in the postman_collection.json file to test the API endpoints.

License

This project is licensed under the MIT License. See the LICENSE file for details..