Foundry FundMe Smart Contract

Introduction

This repository contains the Solidity smart contract code for Foundry FundMe, a decentralized crowdfunding platform. The smart contract enforces a minimum ETH contribution in USD and allows for fund withdrawals by the contract owner.

Smart Contract Details

The smart contract, FundMe.sol, defines the FundMe contract, including functionality for funding, withdrawing funds, and accessing contract information. It utilizes Chainlink's AggregatorV3Interface for ETH to USD price conversion.

Quick Start

To get started quickly, you can clone this repository using Git and follow the deployment and testing instructions provided below.

Clone the Repository

git clone https://github.com/shrutic11/Foundry-Fund-Me-23.git
cd Foundry-Fund-Me-23

Deployment

To deploy the FundMe smart contract, you can use the provided deployment script:

make deploy-anvil  # for deploying using a local RPC node (Anvil Network)
make deploy-sepolia # for deploying using a custom RPC node (Sepolia Network)

Tests

The smart contract is tested using Forge's testing framework. Run the tests with the following commands:

make test-fundme-anvil      # Test fundme functionality on Anvil Network
make test-fundme-sepolia    # Test fundme functionality on Sepolia Network
make test-withdraw-anvil    # Test fund withdrawal on Anvil Network
make test-withdraw-sepolia  # Test fund withdrawal on Sepolia Network

Usage

To use the smart contract, follow these steps:

1. Fund the Project: Call the fund() function, providing ETH as the value to fund the project. The function ensures that the contribution meets the minimum USD requirement.

2. Withdraw Funds: The contract owner can choose to withdraw funds using different methods: withdrawTransfer(), withdrawSend(), or withdrawCall(). Each method has its own approach for transferring funds to the contract owner.

Libraries and Interfaces Used

Solidity Libraries

• PriceConverter: A custom library used to convert ETH to USD based on the ETH to USD price feed obtained from Chainlink.

• console from forge-std/Script.sol: This is a library used for console logging.

Smart Contract Interfaces

• AggregatorV3Interface: The interface for Chainlink's ETH to USD price feed.

Helper Scripts

• HelperConfig.s.sol: A script to fetch the active network configuration.

Deployment Scripts

• DeployFundMe.s.sol: A script to deploy the FundMe contract and set the ETH to USD price feed address.

Makefile Commands

• Various make commands are provided for easy deployment and testing using different networks.

Interactions.s.sol (Integration Testing) explanation:

License

This project is licensed under the MIT License. See the LICENSE file for details.