Flash Loan Arbitrage | Aave Flash Loan Tutorial

Create an Aave Flash Loan arbitrage smart contract from scratch in this comprehensive flash loan tutorial. In this step-by-step DeFi tutorial we use the Aave v3 protocol to build a flash loan receiver smart contract. We'll then use a mock DEX contract to simulate a flash loan arbitrage.

Project repo:
https://github.com/jspruance/aave-flash-loan-tutorial

Aave v3 Flash Loan documentation:
https://docs.aave.com/developers/guides/flash-loans
https://docs.aave.com/developers/deployed-contracts/v3-testnet-addresses

DAI-TestnetMintableERC20-Aave token (Goerli):
0xDF1742fE5b0bFc12331D8EAec6b478DfDbD31464

USDC-TestnetMintableERC20-Aave token(Goerli):
0xA2025B15a1757311bfD68cb14eaeFCc237AF5b43

AAVE PoolAddressProvider (Goerli):
0x5E52dEc931FFb32f609681B8438A51c675cc232d

Get Goerli test Eth here:
https://faucets.chain.link/

Get test ERC20 tokens here:
https://staging.aave.com/faucet/?marketName=proto_goerli

Remix imports:
import {FlashLoanSimpleReceiverBase} from "https://github.com/aave/aave-v3-core/blob/master/contracts/flashloan/base/FlashLoanSimpleReceiverBase.sol";
import {IPoolAddressesProvider} from "https://github.com/aave/aave-v3-core/blob/master/contracts/interfaces/IPoolAddressesProvider.sol";
import {IERC20} from "https://github.com/aave/aave-v3-core/blob/master/contracts/dependencies/openzeppelin/contracts/IERC20.sol";

Dex.sol deployed (Goerli):
0xD6e8c479B6B62d8Ce985C0f686D39e96af9424df

Add liquidity:
USDC 1500
DAI 1500

Approve:
USDC 1000000000
DAI 1200000000000000000000

Request Loan - USDC (6 decimal):
0xA2025B15a1757311bfD68cb14eaeFCc237AF5b43,1000000000 // 1,000 USDC
0xA2025B15a1757311bfD68cb14eaeFCc237AF5b43,1000000 // 1 USDC