Simple DeFi App

FRONT END REPO: https://github.com/umashankar-tech/Simple-Defi-Dapp-Frontend

This project demonstrates a simple DeFi smart contract workflow using Foundry, including local deployment with Anvil and integration with a React frontend.

Features

• Solidity Smart Contract: SimplePayableAndWithdrawal.sol for basic payable and withdrawal functionality.
• Testing: Comprehensive tests using Forge.
• Local Blockchain: Anvil for local development and testing.
• Deployment Scripts: Automated deployment with Forge scripts.
• Frontend Integration: Designed for easy ABI and address export to React apps.

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Getting Started

Prerequisites

• Foundry (includes Forge & Anvil)
• Node.js (for React frontend)

Build & Test

forge build
forge test

Run Local Blockchain

anvil

Deploy Contract

forge script script/DeploySimplePayableAndWithdrawal.s.sol --rpc-url http://127.0.0.1:8545 --private-key <your_private_key> --broadcast

Get ABI for Frontend

After deployment, the ABI is generated at:

out/SimplePayableAndWithdrawal.sol/SimplePayableAndWithdrawal.json

Copy the "abi" section from this file for use in your React app.

Example: Using ABI in React

import contractAbi from './abi/SimplePayableAndWithdrawal.json';
// Use contractAbi.abi with ethers.js or web3.js

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Project Structure

• src/ – Solidity contracts
• script/ – Deployment scripts
• test/ – Contract tests
• out/ – Build artifacts (including ABI)
• broadcast/ – Deployment logs

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Resources

• Foundry Book
• Ethers.js Docs
• React

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