Chainlink Contract

This project demonstrates how to integrate Chainlink's decentralized price feeds into a Solidity smart contract. The PriceConsumerV3 contract serves as a practical example of consuming real-time price data from Chainlink's oracle network, specifically designed to fetch ETH/USD price information on the Sepolia testnet.

The contract implements Chainlink's AggregatorV3Interface to securely retrieve the latest price data from their decentralized oracle network. It's built with flexibility in mind - while pre-configured for ETH/USD on Sepolia, it can work with any Chainlink price feed by simply changing the price feed address during deployment.

Key features include immutable price feed configuration (set once during deployment for security), simple price retrieval functions, and gas-optimized design. The project includes comprehensive testing, deployment scripts, and documentation to help developers understand how to integrate Chainlink price feeds into their own DeFi applications.

This project is built using Solidity 0.8.7 and Hardhat as the development framework. The core technology stack includes:

Smart Contract Layer:

Chainlink AggregatorV3Interface: The official Chainlink interface for consuming price feed data Solidity: Smart contract written with gas optimization and security best practices Immutable storage pattern: Price feed address is set once during deployment for enhanced security Development Tools:

Hardhat: Ethereum development environment for compilation, testing, and deployment Hardhat Toolbox: Comprehensive plugin suite including testing utilities and network management Solhint: Solidity linting for code quality and security best practices Testing & Deployment:

Chai/Mocha: JavaScript testing framework for contract validation Ethers.js: Ethereum library for contract interaction and deployment Sepolia Testnet: Ethereum testnet for safe testing with real Chainlink price feeds