NFT Marketplace Spring Boot Project - Server Side

This project handles the server side of our NFT Marketplace, managing NFT metadata storage in MongoDB and performing CRUD operations. We utilize a microservices approach to achieve this.

Links to related repositories:

Solidity Contract

Client Side

Microservices Overview

A Microservice Application structures an app as a collection of small, loosely-coupled services. Each service runs in its own process and communicates via APIs. This architecture allows for greater scalability, flexibility, and ease of deployment compared to a monolithic approach.

Setting up Microservices

• Service Registry:

  • Created a Spring Boot project ServiceRegistry-Microservice.
  • Added dependencies: Eureka Server, Spring Cloud Netflix, Spring Boot Actuator.
  • Enabled Eureka server using @EnableEurekaServer.
  • Configured Eureka server properties in application.properties.

• NFT Microservice:

  • Created a Spring Boot project nfts-microservices.
  • Added dependencies: Eureka Client, Spring Boot Actuator.
  • Enabled Eureka client using @EnableDiscoveryClient.
  • Configured Eureka client properties in application.properties.
  • Created controllers, services, and repositories.
  • Registered the microservice with Eureka server (Port 8081).

• API Gateway:

  • Created a Spring Boot project for the API Gateway.
  • Added dependencies: Eureka Client, Spring Boot Actuator.
  • Configured Eureka client properties in application.properties.
  • Created necessary routes.
  • Registered the API Gateway with Eureka server (Port 9191).

Creating REST APIs

• Main API Endpoint: /api/nfts/:

  • POST: Store NFTs in MongoDB.
  • PUT: Update NFTs in MongoDB.
  • GET: Retrieve all NFTs from MongoDB.
  • DELETE: Delete an NFT by tokenId.
  • GET: Retrieve an NFT by tokenId.

• Upload Endpoint: /api/nfts/upload:

  • POST: Upload NFT images to the database.