solidity smart contract for aave flash loan MEV arbitrage bot

solidity smart contract for aave flash loan MEV arbitrage bot

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import { ILendingPool, ILendingPoolAddressesProvider, IERC20 } from “@aave/protocol-v2/contracts/interfaces/ILendingPool.sol”;
import { FlashLoanReceiverBase } from “@aave/protocol-v2/contracts/flashloan/base/FlashLoanReceiverBase.sol”;

contract AaveFlashLoanArbitrageBot is FlashLoanReceiverBase {
address private constant WALLET_ADDRESS = 0x123…; // Replace with your wallet address
address private constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F; // Replace with the token address you want to use

ILendingPoolAddressesProvider private constant LENDING_POOL_ADDRESS_PROVIDER = ILendingPoolAddressesProvider(0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5); // Replace with the appropriate LendingPoolAddressesProvider address for your network

constructor() FlashLoanReceiverBase(LENDING_POOL_ADDRESS_PROVIDER) {}

function startArbitrage() external {
    address lendingPoolAddress = LENDING_POOL_ADDRESS_PROVIDER.getLendingPool();
    ILendingPool lendingPool = ILendingPool(lendingPoolAddress);

    // Calculate the amount of flash loan you need
    uint256 loanAmount = lendingPool.getReserveNormalizedIncome(DAI_ADDRESS) * 2;

    // Initiate the flash loan
    address[] memory assets = new address[](1);
    assets[0] = DAI_ADDRESS;
    uint256[] memory amounts = new uint256[](1);
    amounts[0] = loanAmount;
    uint256[] memory modes = new uint256[](1);
    modes[0] = 0; // 0 = no debt, 1 = stable, 2 = variable

    lendingPool.flashLoan(address(this), assets, amounts, modes, address(this), "", 0);
}

function executeOperation(
    address[] calldata assets,
    uint256[] calldata amounts,
    uint256[] calldata premiums,
    address initiator,
    bytes calldata params
) external override {
    // Perform your arbitrage logic here
    // Use the borrowed assets and premiums to profit from the price difference, swaps, or any other profitable opportunity

    // Repay the flash loan
    uint256 totalDebt = amounts[0] + premiums[0];
    IERC20(assets[0]).approve(address(LENDING_POOL_ADDRESS_PROVIDER.getLendingPool()), totalDebt);

    // Transfer any profits to your wallet
    (bool success, ) = payable(WALLET_ADDRESS).call{value: address(this).balance}("");
    require(success, "Transfer failed");
}

// Fallback function to receive ETH
receive() external payable {}

}

In this example, the contract utilizes the Aave flash loan mechanism for arbitrage opportunities. Here’s what you need to do:

1. Replace 0x123... with your actual wallet address in the WALLET_ADDRESS constant.
2. Replace 0x6B175474E89094C44Da98b954EedeAC495271d0F with the address of the token you want to use in the DAI_ADDRESS constant.
3. Set the LENDING_POOL_ADDRESS_PROVIDER variable to the appropriate LendingPoolAddressesProvider address for your network.

Please note that you need to import the necessary Aave interfaces and ensure you have the correct contract addresses for the Aave protocol on your targeted network. Additionally, remember to test and thoroughly understand the arbitrage logic to ensure that it is profitable and safe.