Flash Loans Exercise 3

Intro

Your goal in this exercise is to execute successfully an Uniswap V2 Flash Swap.

Note: This exercise is executed on an Ethereum mainnet Fork block number 15969633.

Ethereum MAINNET Addresses

USDC: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48

Uniswap V2 USDC-WETH Pair: 0xB4e16d0168e52d35CaCD2c6185b44281Ec28C9Dc

Impersonated Account: 0x8e5dedeaeb2ec54d0508973a0fccd1754586974a

Tasks

Task 1

Implement the executeFlashSwap and uniswapV2Call functions inside the FlashSwap.sol smart contract.

executeFlashSwap - receives a token and an amount and execute a flash swap.

uniswapV2Call - the "callback" function, will be called from Uniswap V2 pair contract.

Use the Solidity Hardhat console.log command to log the following params:

1. Contract's token balance before the flash swap.
2. Contract's token balance during the flash swap.
3. Flash swap fee.

Task 2

In the tests.js complete all the open TODOs

Make sure to impersonate the account that is mentioned in the addresses section so you have enough USDC to send to your FlashSwap.sol contract (for fees).