DeFi Playground 📈😱🚀

🙋‍♂️ I made this repo to teach myself, "how to do x with y" where "y" is a DeFi protocol.

Requirements

1. Node.js v14+
2. Alchemy - Make an alchemy account and set the ALCHEMY_API_KEY environment variable in the .env file
3. Run yarn to install dependencies
4. Run yarn test to test the implementations

Compound Finance

Helpful Reading

• 💽 Interfaces we use to interact with Compound's contracts
• ＃ Addresses we use to connect to the mainnet deployed contracts
• ⚡️ Check Fixtures, we use these to setup our tests
• 📜 Compound Docs for cTokens, Comptroller, ie: controller

🤔 How tos?

1. 💰 How to deposit a token and get back a interest bearing cTokens?
2. 💸 How to withdraw / cash out your tokens by returning cTokens?
3. 🤔 How to earn interest on your token deposits? (Demonstration)
4. 🏦 How to take a loan and borrow tokens after setting a collateral?
5. ⚖️ How to check the balance you borrowed?
6. 🥳 How to repay the loan?
7. 📈 How to calculate the exchange rate of cTokens?
8. 📦 How many underlying tokens does the compound contract holds?
9. 🧐 How to check the total supply and total borrows of a token?
10. 🙋‍♂️ How to calculate the supply APY and borrow APR of a token?

Aave V2

Helpful Reading

• 💽 Interfaces we use to interact with Aave V2 contracts
• ＃ Addresses we use to connect to the mainnet deployed contracts
• ⚡️ Check Fixtures, we use these to setup our tests
• 📜 Aave V2 Docs for Lending Pool, Price Oracle, aTokens and FAQs

🤔 How tos?

1. 💰 How to deposit erc20 token and get back interest bearing aTokens?
2. 💸 How to withdraw/cashout erc20 tokens by returning back aTokens?
3. 🤔 How to earn interest on your erc20 token deposits?
4. 🏦 How to set a particular erc20 token as collateral for your loan borrows?
5. 💵 How to take a stable interest rate loan against your collateral?
6. 💱 How to convert your stable interest loan to a variable interest loan?
7. 🥳 How to repay the loan?
8. 🧐 How to get user data (ie: total collateral, debt, amount borrowable)?
9. 🧐 How to get user data (ie: total collateral, debt, amount borrowable)?
10. 🙋‍♂️ How to get the supply APY and borrow APR for a erc20 token
11. ⚖️ How to get the price of erc20 token in ETH from aave oracle?
12. TBD - Flashloans