FL4G (Built at ETHShanghai 2022 Hackathon)

FL4G (FlashLoans4Good) is a liquidation protection platform built to serve mainstream borrowers.

Project Overview

One of the biggest problems in decentralised finance (DeFi) today is market volatility which can lead to costly liquidations and hence the loss of money. Flashloans4Good uses flash loans as a force for good to protect that money by minimising collateral losses from costly liquidations. These users want to utilise DeFi to borrow with the goal of improving their lives in some way. They take on good debt such as to pay for education, fund a business, or own a home. We strongly believe that by simplifying the user experience and by minimising collateral losses due to liquidations this can help to drive the mass adoption of DeFi.

Architecture

Tech Stack

• Solidity/Truffle/Infura/Netlify
• React/Javascript/CSS/HTML

Build & Run platform (locally)

Launch frontend

1. cd packages/core/interface
2. npm install
3. npm start

Deploy to Netlify

1. npm install netlify-cli -g Note: if fails with post-install error refer > https://answers.netlify.com/t/netlify-cli-fails-to-install/34508/4 or try using a different version npm i netlify-cli@10.3.3
2. npm run build
3. netlify deploy

Deploy to Polygon Mumbai

1. Install truffle with npm install -g truffle
2. Add matic network to truffle-config.js > refer https://docs.polygon.technology/docs/develop/truffle/
3. Create .env file with INFURA and MNEMONIC info > refer https://forum.openzeppelin.com/t/testnet-deployment-error-could-not-create-addresses-from-your-mnemonic-or-private-key-s/4461
4. truffle migrate --network matic

FlashLoan Smart Contract https://mumbai.polygonscan.com/tx/0x61f5bec2f34c548a1fcf1f7b4e43233764f5e356222eb85912c1fa63482babcd

Gelato Resolver Contracts https://mumbai.polygonscan.com/address/0xA5F241e14e75e62390a310D3396421D5Dd85d313

Testing procedure

1. Install Ganache refer > https://trufflesuite.com/ganache/
2. Once installed Launch (aka start) > create new workspace or quickstart (in this case, we have a workspace called ETH SHANGHAI 2022 HACKATHON)
3. Ensure RPC server is pointing to port 8545 and that matches the development network port in truffle-config.js
4. cd packages/core
5. truffle test test/test-aave-flash-loan.js

Contract Addresses

PoolAddressesProvider

• Mumbai V3: 0x5343b5bA672Ae99d627A1C87866b8E53F47Db2E6

Aave Faucets

• Mumbai V3: 0xc1eB89DA925cc2Ae8B36818d26E12DDF8F8601b0

Gelato Network Ops

• Mumbai V3: 0xB3f5503f93d5Ef84b06993a1975B9D21B962892F

Gelato Network TaskTreasury

• Mumbai V3: 0x527a819db1eb0e34426297b03bae11F2f8B3A19E

Public Netlify URL

https://fl4gs.netlify.app/

Information

• Created at: ETH Shanghai 2022 Hackathon
• Demo day video: ETH Shanghai 2022 Hackathon Demo Video
• Slides: Presentation Slides

Incomplete Future developments

• Frontend: wallet integration, integrate new AaveV3 borrower subgraph and display
• Backend: Working with Aave, Gelato, and DeFiSaver teams to fix flash loan repayments
• Deploy to IPFS (workaround deployed to Netlify).