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Java REST API for Interacting with Ethereum Smart Contracts (Hyperledger Besu)

🚀 Overview

This project is a Java-based RESTful API designed to interact with smart contracts deployed on an Ethereum-compatible client using Hyperledger Besu.

The API enables:

  • Retrieving the name of an ERC20 token
  • Querying the amount of minted tokens

📄 Smart Contract Used

  • UpgradableTokenTest.sol – a simple upgradable ERC20 token contract

🛠️ Getting Started

1. Clone the Repository

git clone https://github.com/dariusjvc/Java-RestAPI-For-Ethereum.git
cd java-rest-api-for-evm

2. Deploy the Smart Contracts

Use Hardhat and the Quorum Test Network to deploy the smart contract.

Note: Make sure you have all prerequisites installed (Node.js, Hardhat, Docker, etc.)

3. Run the API

Open the project with IntelliJ IDEA or your preferred Java IDE and run the Spring Boot application.

📷 Screenshot

API Swagger UI

🌐 API Access

Once running, access the Swagger UI at:

http://localhost:8080/ethereum-api/swagger-ui/index.html#/

✅ Features

  • ✅ Java Spring Boot backend
  • ✅ Web3j for Ethereum interaction
  • ✅ Swagger UI for easy testing
  • ✅ Deployable on a local Besu node

📌 Future Improvements

  • Add authentication and security
  • Expand smart contract functionality
  • Dockerize the application for easier deployment