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defi_py_mix

For all your DeFi needs

You can see a smaller version of this here.

In our aave_borrow.py script, we do the following:

  1. Approve our ETH to be swapped for WETH
  2. Swap an amount of ETH for WETH
  3. Using deposit_to_aave we deposit the WETH as collateral
  4. We use that collateral to borrow DAI with borrow_erc20
  5. Then, we pay it back!
  6. We can view the txs on etherscan to see what's going on under the hood.

In our short_sell.py script, we do the following:

  1. Approve our ETH to be swapped for WETH
  2. Swap an amount of ETH for WETH
  3. Using deposit_to_aave we deposit the WETH as collateral
  4. We use that collateral to borrow DAI with borrow_erc20
  5. We then sell that DAI on the Uniswap DEX This is essentailly a short sell on DAI!

Setup

You'll need python, pipx, and eth-brownie installed.

Ideally you'd install with pipx

pip install --user pipx
pipx ensurepath
# restart your terminal
pipx install eth-brownie

Or, you could try it with pip.

pip install -r requirements.txt

Or, if you run into issues use pipx:

You'll need the following environment variables. If you're unfamiliar with environment variables, you can set them all in your .env file:

export WEB3_INFURA_PROJECT_ID=YourProjectID
export PRIVATE_KEY="0xasdfasdfasdfasd..."
  • PRIVATE_KEY: Your Private Key from your Wallet. *Note: If using metamask, you'll have to add a 0x to the start of your private key.
  • WEB3_INFURA_PROJECT_ID: Your connection to the blockchain. You can get a URL from a service like Infura]. Right now it is hard coded to work with infura, but you can modify it however you want using brownie networks modify.

Note: DO NOT SEND THESE TO GITHUB!!!

And last, be sure to check the aave_dai_token if you're using a testnet DAI token. Aave sometimes changes the token they use on testnet to keep liquidity, please check here for reference. Also, feel free to check the Aave docs as well, to learn more about the tools we are using.

Quickstart - kovan

  1. Get some kovan ETH

  2. Get some WETH

brownie run scripts/get_weth.py --network kovan
  1. Run the script!
brownie run scripts/aave_borrow.py --network kovan

Quickstart - mainnet-fork

Optional for running locally: If you want to run locally, you can install ganache-cli and yarn. Here is where you can install yarn.

yarn global add ganache-cli

Then, you can run ganache-cli --fork YOUR_INFURA_URL_HERE, or just brownie run <YOUR_SCRIPT> --network mainnet-fork

  1. Get some WETH, borrow, and repay!
brownie run scripts/aave/aave_borrow.py

Or, to test short selling:

brownie run scripts/swap/short_sell.py