This is a TypeScript project for creating a client for the WhatsApp Web API. It allows to interact with the API and perform operations like sending messages, checking authentication status and retrieving QR code.

• Node.js and npm installed on your machine
• A device with WhatsApp installed and open
• QR code of the WhatsApp to be able to authenticate

1. Clone the repository
2. Run npm install in the project folder to install all dependencies

1. Run npm start to start the server
2. The server will be running on http://localhost:3000

• GET /sendMessage/:number/:text: Sends a message to the specified number with the specified text
• GET /isAuthenticated: Returns the authentication status of the client
• GET /getQr: Returns the QR code for authentication

• src/app.ts: Entry point of the application. It sets up the express app and listens to the specified port
• src/controller.ts: Handles the routes and delegates the work to the WhatsAppClient
• src/WhatsAppClient.ts: The main client which interacts with the WhatsApp Web API. It implements the singleton pattern to ensure that only one instance of the client is created.

If you wish to contribute to the project, feel free to create a pull request. Make sure your changes are well-documented and well-tested.