callFunction for Uniswap & Sushiswap arbitrage

uni_sushi_arbitrage.sol

// This is the function that will be called postLoan
// i.e. Encode the logic to handle your flashloaned funds here
function callFunction(
    address sender,
    Account.Info memory account,
    bytes memory data
) public {
    DexArbitrage memory dex = abi.decode(data, (DexArbitrage));
    address[] memory path1 = new address[](2);
    address[] memory path2 = new address[](3);

    uint256 amountIna = IERC20(dex.a).balanceOf(address(this));
    IERC20(dex.a).approve(address(uniswap), amountIna);
    path1[0] = address(dex.a);
    path1[1] = address(dex.b);
    uniswap.swapExactTokensForTokens(amountIna, 0, path1, address(this), block.timestamp);

    uint256 amountInb = IERC20(dex.b).balanceOf(address(this));
    IERC20(dex.b).approve(address(sushiswap), amountInb);
    path2[0] = address(dex.b);
    path2[1] = address(address(weth));
    path2[2] = address(dex.c);
    sushiswap.swapExactTokensForTokens(amountInb, 0, path2, address(this), block.timestamp);

    uint256 amountInc = IERC20(dex.c).balanceOf(address(this));
    IERC20(dex.c).approve(address(uniswap), amountInc);
    path1[0] = address(dex.c);
    path1[1] = address(dex.a);
    uniswap.swapExactTokensForTokens(amountInc, 0, path1, address(this), block.timestamp);

    uint256 profit = IERC20(dex.a).balanceOf(address(this)) - dex.repayAmount;
    // Note that you can ignore the line below
    // if your dydx account (this contract in this case)
    // has deposited at least ~2 Wei of assets into the account
    // to balance out the collaterization ratio
    require(
        profit > 0,
        "Not enough funds to repay dydx loan!"
    );

    // transfer the profit to the owner address
    IERC20(dex.a).transfer(owner, profit);

    // TODO: Encode your logic here
    // E.g. arbitrage, liquidate accounts, etc
    // revert("Hello, you haven't encoded your logic");
    emit FlashLoanEmitted(dex.a, dex.b, dex.c, dex.repayAmount);
}