Node.js License Service (DDD & CQRS Architecture)

The License Service provides an interface for managing licenses in an application. It generates and verifies license keys associated with devices based on a master key and additional metadata, using HMAC-based encryption for security.

Features

• Express.js: Fast, unopinionated, minimalist web framework for Node.js

• ESLint: Linting JavaScript code for consistency and avoiding errors

• Prettier: Code formatter for maintaining code style

• dotenv: Loads environment variables from a .env file

• Morgan: HTTP request logger middleware for Node.js

• Helmet: Helps secure Express apps by setting various HTTP headers

• CORS: Cross-Origin Resource Sharing middleware

• JWT: Authentication Method with Json Web Token

• MongoDB: Database MongoDB for storing data

• Docker: Docker for containerized

• Master Key Generation: Generates a master key with a specified lifetime and associated metadata.

• License Key Generation: Generates device-specific license keys tied to a master key with expiration dates and device quotas.

• License Verification: Verifies the validity of a license key based on provided inputs.

Prerequisites

• Node.js (v14.x or higher)
• npm or yarn

Getting Started

1. Clone the repository:

   git clone git@github.com:aldo235/license-service-nodejs.git
   cd license-service-nodejs

2. Install dependencies:

   npm install
       # or
   yarn install

3. Set up environment variables:
   • Create a .env file in the root of the project.
   • Add the following variables:

   PORT=
   BASIC_AUTH_USERNAME=
   BASIC_AUTH_PASSWORD=
   JWT_SECRET=
   JWT_ISSUER=
   MONGODB_URL=
   LICENSE_SECRET=

4. Run the application:

   # DEV
   npm run start dev
   yarn start dev
   
   #PROD
   npm run start
   yarn start

Docker

1. Build Docker:

   docker build -t licenseservice:latest . 

2. Set up environment variables:
   • Create a .env file in the root of the project.
   • Add the following variables:

   PORT=
   BASIC_AUTH_USERNAME=
   BASIC_AUTH_PASSWORD=
   JWT_SECRET=
   JWT_ISSUER=
   LICENSE_SECRET=

3. Run Docker:

   docker run --env-file __LOCATION_ENV__ --name licenseservice -d --publish 8080:8080 licenseservice:latest
   ``