Nish Decentralized Exchange

Overview

This project is a decentralized exchange (DEX) that facilitates swap operations between Solana (SOL) and USDT. The backend utilizes PostgreSQL for database management, and the frontend is built using Next.js with integration for authentication and token management.

Features

• Swap Operations: Allows swapping between Solana and USDT using Jupiter's swap API.
• Token Balances: Fetches and displays token balances and their USD value.
• Authentication: User authentication via NextAuth.
• Dynamic UI: Responsive and dynamic frontend components for a seamless user experience.

Setup and Installation

Prerequisites

• Docker
• Node.js (v14 or higher)
• PostgreSQL
• Solana CLI (for local development)

Setting Up PostgreSQL with Docker

1. Pull PostgreSQL Docker Image

   docker pull postgres:latest

2. Run PostgreSQL Container

   docker run --name postgres-container -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=yourpassword -e POSTGRES_DB=yourdatabase -p 5432:5432 -d postgres:latest

   Replace yourpassword and yourdatabase with your desired password and database name.

Backend Setup

1. Clone the Repository

   git clone https://github.com/your-repo/decentralized-exchange.git
   cd decentralized-exchange

2. Install Dependencies

   cd backend
   npm install

3. Set Up Environment Variables

   Create a .env file in the backend directory and add the following variables:

   DATABASE_URL=postgres://postgres:yourpassword@localhost:5432/yourdatabase
   SOLANA_CLUSTER=https://mainnet.helius-rpc.com/?api-key=your_api_key

   Replace yourpassword, yourdatabase, and your_api_key with your PostgreSQL password, database name, and Solana API key, respectively.

4. Run Migrations

   If applicable, run migrations to set up your database schema.

   npm run migrate

5. Start the Backend Server

   npm start

Frontend Setup

1. Install Dependencies

   cd frontend
   npm install

2. Set Up Environment Variables

   Create a .env.local file in the frontend directory and add the following variables:

   NEXT_PUBLIC_API_URL=http://localhost:3000/api

   Adjust NEXT_PUBLIC_API_URL if your API runs on a different URL or port.

3. Start the Frontend Server

   npm run dev

Usage

1. Access the Application

   Open your browser and navigate to http://localhost:3000.

2. Authentication

   Sign in using Google authentication. Ensure that your Google OAuth credentials are properly configured in the NextAuth settings.

3. Swap Tokens

   Use the provided UI to perform swap operations between Solana and USDT.

4. View Token Balances

   Navigate to the token management section to view and manage your token balances.

Contributing

Contributions are welcome! Please open an issue or submit a pull request for any enhancements or bug fixes.