PiggyBank - A smarter way to Swap & Earn

PiggyBank is an innovative Web3 platform that not only helps users convert idle crypto assets into interest-bearing ones, but also consolidates scattered assets into a single token. By integrating smart contracts with DeFi protocols, users can easily deposit various tokens into a vault and earn stable interest income.

🌟 Main functions

• 💰 Multi-Token Support: Supports major stablecoins such as USDC, DAI, and USDT
• 🔄 One-Click Swap: Utilizes 1inch Portal API for swap commands and packages transactions via Circle API to provide the most optimal swap route
• 💸 Auto Yield Generation: Integrates ERC-4626 and Yearn for automated asset management and yield generation

🛠 Tech Stack

Frontend

• Vue 3 + Vite
• Pinia status management
• ethers.js
• Circle API
• Viem

Backend

• Node.js + Express
• MultiBaas API
• 1inch API

Smart Contract(deployed on Polygon)

• Solidity
• Hardhat
• OpenZeppelin

📁 Project Structure

ETH-Global/
├── frontend/          
├── hardhat/           
├── server/          
├── .gitignore
└── README.md

👥 Development Team

• Willy Lin: Integrating all & Backend Development

  • Responsible for integrating Circle and 1inch APIs
  • Integrating and testing frontend, backend, and smart contract
  • IG: @weili9534

• YU ZhenYan: Backend Development

  • Implemented event listening via MultiBaas
  • Developed webhook verification mechanisms
  • IG: @zhenyano555

• Shi Jui Line: Smart Contract Development

  • Designed and implemented the vault smart contract
  • Developed contract testing and deployment scripts
  • IG: @shuruilian

• Jun Yuan Lin: Frontend Development

  • Designed and developed the user interface
  • Integrated Web3 wallet functionalities
  • IG: @jun_yuan0702

• Pan Yung Hao: Project Assistant

  • Created project presentations and demo videos
  • Handled administrative tasks
  • IG: @re_aprhp_027

🔗 Links

• ETH Global: https://ethglobal.com/showcase/piggybank-3x9be
• PPT slides: https://www.canva.com/design/DAGjrS__wLU/gqIsMfo2JREjO1A9KJ7rTQ/edit