diff --git a/contracts/Flashy.sol b/contracts/Flashy.sol
new file mode 100644
index 0000000..f6c168b
--- /dev/null
+++ b/contracts/Flashy.sol
@@ -0,0 +1,389 @@
+// SPDX-License-Identifier: agpl-3.0
+pragma solidity ^0.8.0;
+pragma experimental ABIEncoderV2;
+
+import { IERC20 } from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
+import { SafeMath } from '@openzeppelin/contracts/utils/math/SafeMath.sol';
+import { SafeERC20 } from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
+
+
+// WETH
+interface IWETH9 {
+    function withdraw(uint wad) external;
+}
+
+// Aave
+interface ILendingPool {
+  function flashLoan(
+    address receiverAddress,
+    address[] calldata assets,
+    uint256[] calldata amounts,
+    uint256[] calldata modes,
+    address onBehalfOf,
+    bytes calldata params,
+    uint16 referralCode
+  ) external;
+}
+
+interface ILendingPoolAddressesProvider {
+  function getLendingPool() external view returns (address);
+}
+
+interface IFlashLoanReceiver {
+  function executeOperation(
+    address[] calldata assets,
+    uint[] calldata amounts,
+    uint[] calldata premiums,
+    address initiator,
+    bytes calldata params
+  ) external returns (bool);
+}
+
+abstract contract FlashLoanReceiverBase is IFlashLoanReceiver {
+  using SafeERC20 for IERC20;
+  using SafeMath for uint256;
+
+  ILendingPoolAddressesProvider public immutable ADDRESSES_PROVIDER;
+  ILendingPool public immutable LENDING_POOL;
+
+  constructor(address provider) {
+    ADDRESSES_PROVIDER = ILendingPoolAddressesProvider(provider);
+    LENDING_POOL = ILendingPool(ILendingPoolAddressesProvider(provider).getLendingPool());
+  }
+
+  receive() external virtual payable {}
+}
+
+// Uniswap V2
+interface IUniswapV2Router01 {
+    function swapExactTokensForTokens(
+        uint amountIn,
+        uint amountOutMin,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external returns (uint[] memory amounts);
+
+    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
+    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
+}
+
+interface IUniswapV2Router02 is IUniswapV2Router01 {
+    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
+        uint amountIn,
+        uint amountOutMin,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external;
+}
+
+// Uniswap V3
+library TransferHelper {
+    function safeApprove(
+        address token,
+        address to,
+        uint256 value
+    ) internal {
+        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value));
+        require(success && (data.length == 0 || abi.decode(data, (bool))), 'SA');
+    }
+}
+
+interface IUniswapV3SwapCallback {
+    function uniswapV3SwapCallback(
+        int256 amount0Delta,
+        int256 amount1Delta,
+        bytes calldata data
+    ) external;
+}
+
+interface ISwapRouter is IUniswapV3SwapCallback {
+    struct ExactInputSingleParams {
+        address tokenIn;
+        address tokenOut;
+        uint24 fee;
+        address recipient;
+        uint256 deadline;
+        uint256 amountIn;
+        uint256 amountOutMinimum;
+        uint160 sqrtPriceLimitX96;
+    }
+
+    function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);
+
+    struct ExactInputParams {
+        bytes path;
+        address recipient;
+        uint256 deadline;
+        uint256 amountIn;
+        uint256 amountOutMinimum;
+    }
+
+    function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);
+}
+
+// Contract
+contract Flashy is FlashLoanReceiverBase {
+    address payable owner;
+    using SafeMath for uint;
+
+    uint256[] private quantities;
+    address[] private tokens_addresses;
+
+    uint8 private arb_swap_path;
+    uint24 private fee;
+    
+    
+
+    IUniswapV2Router02 public constant sushi_router_v2= IUniswapV2Router02(0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F);
+    IUniswapV2Router02 public constant uni_router_v2 = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
+    ISwapRouter public constant uni_router_v3 = ISwapRouter(0xE592427A0AEce92De3Edee1F18E0157C05861564);
+    IWETH9 public constant weth = IWETH9(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
+
+
+    constructor(address payable _owner, address _addressProvider) FlashLoanReceiverBase(_addressProvider) {
+        owner = _owner;
+    }
+
+    // Events
+    event Received(address sender, uint256 value);
+    event Withdraw(address to, uint256 value);
+    event Minner_fee(uint256 value);
+    event Withdraw_token(address to, uint256 value);
+
+    
+    modifier onlyOwner() {
+      require(msg.sender == owner, "Not the Owner");
+      _;
+    }
+
+    modifier checking_amount(address token, uint amount) {
+        require(IERC20(token).balanceOf(address(this)) >= amount, "The amount exceeds balance!");
+        _;
+    }
+
+    function new_owner(address payable _new_owner) external onlyOwner returns (bool) {
+        owner = _new_owner;
+        return true;
+    }
+
+    receive() external override payable {}
+
+    function withdraw(uint256 _amount) public onlyOwner returns (bool) {
+        require(_amount <= address(this).balance, "Insufficient ETH amount!");
+        owner.transfer(_amount);
+        
+        emit Withdraw(owner, _amount);
+        return true;
+    } 
+
+    function withdraw_weth(uint8 _percentage) public onlyOwner returns (bool) {
+        require(IERC20(address(weth)).balanceOf(address(this))  > 0, "There is no WETH balance!"); 
+        require((0 < _percentage) && (_percentage <= 100), "Invalid percentage!");
+
+        weth.withdraw(IERC20(address(weth)).balanceOf(address(this)));
+
+        uint256 amount_to_withdraw = SafeMath.mul(SafeMath.div(address(this).balance, 100), _percentage);
+        block.coinbase.transfer(amount_to_withdraw);
+        emit Minner_fee(amount_to_withdraw);
+
+        return withdraw(address(this).balance);
+    }
+    
+    function withdraw_token(address _token) public onlyOwner returns ( bool ) {
+        uint256 balance =  IERC20(_token).balanceOf(address(this)); 
+        require(balance > 0, "There is no token balance!");  
+        bool check = IERC20(_token).transfer(owner, balance);
+
+        emit Withdraw_token(owner, balance);
+        return check;
+    }
+
+    function withdraw_filter(address _token, uint8 _percentage, uint8 _dex, uint24 _dexfee) public onlyOwner returns (bool) {
+        if (_token == address(weth)) {
+            return withdraw_weth(_percentage);
+        } else {
+            // The lines below are not the best way to follow, due to increasing of txs but the payment for the minner is only allowed with WETH
+            require((0 < _dex) && (_dex < 4), "Invalid dex option for withdraw ETH!");
+            if (_dex == 1) {
+                sushi(_token, address(weth), IERC20(_token).balanceOf(address(this)));
+                return withdraw_weth(_percentage);
+            }
+            if (_dex == 2) {
+                uni_v2(_token, address(weth), IERC20(_token).balanceOf(address(this)));
+                return withdraw_weth(_percentage);
+            }
+            if (_dex == 3) {
+                require((_dexfee == 500) || (_dexfee == 3000) || (_dexfee == 10000), "Invalid fee for swapping in UniV3");
+                uni_v3(_token, address(weth), IERC20(_token).balanceOf(address(this)), _dexfee);
+                return withdraw_weth(_percentage);
+            }
+            return false;
+        }
+    }
+
+    function get_path(address _tokenIn, address _tokenOut) internal pure returns (address[] memory) {
+      address[] memory path;
+      path = new address[](2);
+      path[0] = _tokenIn;
+      path[1] = _tokenOut;
+      return path;
+    }
+
+    function get_amountsOut(uint256 _amountIn, address[] memory _path, IUniswapV2Router02 _router) public view returns (uint) {
+      uint256[] memory amountsOut = _router.getAmountsOut(_amountIn, _path);
+      uint amountOutMin = amountsOut[amountsOut.length - 1];
+      return amountOutMin;
+    }
+
+    // Functions for swapping on 3 main dexes
+
+   function sushi(address _tokenIn, address _tokenOut, uint256 _amountIn) public checking_amount(_tokenIn, _amountIn) {
+       IERC20(_tokenIn).approve(address(sushi_router_v2), _amountIn);
+
+       address[] memory _path = get_path(_tokenIn, _tokenOut);
+
+        uint _amountOutMin = get_amountsOut(_amountIn, _path, sushi_router_v2);
+
+        sushi_router_v2.swapExactTokensForTokens(_amountIn, _amountOutMin, _path, address(this), block.timestamp + 300);
+   }
+
+   function uni_v2(address _tokenIn, address _tokenOut, uint256 _amountIn) public checking_amount(_tokenIn, _amountIn) {
+       IERC20(_tokenIn).approve(address(uni_router_v2), _amountIn);
+
+       address[] memory _path = get_path(_tokenIn, _tokenOut);
+
+        uint _amountOutMin = get_amountsOut(_amountIn, _path, uni_router_v2);
+
+        uni_router_v2.swapExactTokensForTokens(_amountIn, _amountOutMin, _path, address(this), block.timestamp + 300);
+   }
+
+   function uni_v3(address _tokenIn, address _tokenOut, uint256 _amountIn, uint24 _fee) public payable checking_amount(_tokenIn, _amountIn) {
+        TransferHelper.safeApprove(_tokenIn, address(uni_router_v3), _amountIn);
+
+        ISwapRouter.ExactInputSingleParams memory params = ISwapRouter.ExactInputSingleParams({                
+            tokenIn: _tokenIn,                
+            tokenOut: _tokenOut,                
+            fee: _fee,                
+            recipient: address(this),                
+            deadline: block.timestamp + 300,                
+            amountIn: _amountIn,                
+            amountOutMinimum: 0,                
+            sqrtPriceLimitX96: 0           
+            });
+    
+        uni_router_v3.exactInputSingle(params);
+    }
+
+    function arb_swap(address _asset01, address _asset02, uint256 _amount, uint8 _dex_path, uint24 _fee) public {
+        require((0 < _dex_path) && (_dex_path < 7), "Invalid dex option for arbitrage!");
+        if (_dex_path == 1) {
+            require((_fee == 500) || (_fee == 3000) || (_fee == 10000), "Invalid fee for swapping in UniV3");
+            uni_v3(_asset01, _asset02, _amount, _fee);
+            uni_v2(_asset02, _asset01, IERC20(_asset02).balanceOf(address(this)));
+        }
+        if (_dex_path == 2) {
+            require((_fee == 500) || (_fee == 3000) || (_fee == 10000), "Invalid fee for swapping in UniV3");
+            uni_v3(_asset01, _asset02, _amount, _fee);
+            sushi(_asset02, _asset01, IERC20(_asset02).balanceOf(address(this)));            
+        }
+        if ( _dex_path == 3) {
+            require((_fee == 500) || (_fee == 3000) || (_fee == 10000), "Invalid fee for swapping in UniV3");
+            uni_v2(_asset01, _asset02, _amount);
+            uni_v3(_asset02, _asset01, IERC20(_asset02).balanceOf(address(this)), _fee);
+        }
+        if (_dex_path == 4) {
+            require((_fee == 500) || (_fee == 3000) || (_fee == 10000), "Invalid fee for swapping in UniV3");
+            sushi(_asset01, _asset02, _amount);
+            uni_v3(_asset02, _asset01, IERC20(_asset02).balanceOf(address(this)), _fee);
+        }
+        if (_dex_path == 5) {
+            uni_v2(_asset01, _asset02, _amount);
+            sushi(_asset02, _asset01, IERC20(_asset02).balanceOf(address(this)));
+        }
+        if (_dex_path == 6) {
+            sushi(_asset01, _asset02, _amount);
+            uni_v2(_asset02, _asset01, IERC20(_asset02).balanceOf(address(this)));
+        }
+    }
+
+
+    
+
+    
+    function executeOperation(
+        address[] calldata assets,
+        uint256[] calldata amounts,
+        uint256[] calldata premiums,
+        address initiator,
+        bytes calldata params
+    )
+        external
+        override
+        returns (bool)
+    {
+        
+        //CODE
+        arb_swap(tokens_addresses[0], tokens_addresses[1], quantities[0], arb_swap_path, fee);
+        // CODE
+        
+        // Approve the LendingPool contract allowance to *pull* the owed amount
+        for (uint i = 0; i < assets.length; i++) {
+            uint amountOwing = amounts[i].add(premiums[i]);
+            IERC20(assets[i]).approve(address(LENDING_POOL), amountOwing);
+        }
+        
+        return true;
+    }
+
+    function _flashloan(address[] memory assets, uint256[] memory amounts) internal {
+        address receiverAddress = address(this);
+
+        uint256[] memory modes = new uint256[](assets.length);
+
+        // 0 = no debt (flash), 1 = stable, 2 = variable
+        for (uint256 i = 0; i < assets.length; i++) {
+            modes[i] = 0;
+        }
+
+        address onBehalfOf = address(this);
+        bytes memory params = "";
+        uint16 referralCode = 0;
+
+
+        LENDING_POOL.flashLoan(
+            receiverAddress,
+            assets,
+            amounts,
+            modes,
+            onBehalfOf,
+            params,
+            referralCode
+        );
+    }
+
+    
+    function flash_loan(address _asset01, address _asset02, uint256 _amount, uint8 _arb_swap_path, uint24 _arb_swap_fee, uint8 _withdraw_path, uint24 _withdraw_fee, uint8 _percentage) onlyOwner public {
+
+        address[] memory assets = new address[](1);
+        assets[0] = _asset01;
+
+        uint256[] memory amounts = new uint256[](1);
+        amounts[0] = _amount;
+
+        quantities = amounts;
+        tokens_addresses = [_asset01, _asset02];
+        arb_swap_path = _arb_swap_path;
+        fee = _arb_swap_fee;
+
+        _flashloan(assets, amounts);
+
+        // The line below is just commented for testing purposes
+        //withdraw_filter(_asset01, _percentage, _withdraw_path, _withdraw_fee);
+    }
+
+    function close() onlyOwner public payable {
+        selfdestruct(owner);
+    }
+}
diff --git a/contracts/Migrations.sol b/contracts/Migrations.sol
new file mode 100644
index 0000000..f4661c6
--- /dev/null
+++ b/contracts/Migrations.sol
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.4.22 <0.8.0;
+
+contract Migrations {
+  address public owner = msg.sender;
+  uint public last_completed_migration;
+
+  modifier restricted() {
+    require(
+      msg.sender == owner,
+      "This function is restricted to the contract's owner"
+    );
+    _;
+  }
+
+  function setCompleted(uint completed) public restricted {
+    last_completed_migration = completed;
+  }
+}
diff --git a/migrations/1_initial_migration.js b/migrations/1_initial_migration.js
new file mode 100644
index 0000000..16a7ba5
--- /dev/null
+++ b/migrations/1_initial_migration.js
@@ -0,0 +1,5 @@
+const Migrations = artifacts.require("Migrations");
+
+module.exports = function (deployer) {
+  deployer.deploy(Migrations);
+};
diff --git a/migrations/2_deploy_contracts.js b/migrations/2_deploy_contracts.js
new file mode 100644
index 0000000..1eaa4f2
--- /dev/null
+++ b/migrations/2_deploy_contracts.js
@@ -0,0 +1,12 @@
+let Flashloan = artifacts.require("Flashy");
+
+const path = require('path')
+require('dotenv').config({ path: path.resolve(__dirname, '../.env') })
+
+module.exports = async function (deployer, network) {
+    try {
+        await deployer.deploy(Flashloan, process.env.ADDRESS_PRIVATE_KEY, '0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5');
+    } catch (e) {
+        console.log(`Error in migration: ${e.message}`);
+    }
+}
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..5a16697
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,4740 @@
+{
+  "name": "flash-loan-aave-v2-3",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
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+      "requires": {
+        "@babel/highlight": "^7.16.7"
+      }
+    },
+    "@babel/compat-data": {
+      "version": "7.17.0",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.17.0.tgz",
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+    },
+    "@babel/generator": {
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+        "web3-net": "1.7.0"
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+            "ethereum-cryptography": "^0.1.3",
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+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..e15c111
--- /dev/null
+++ b/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "flash-loan-aave-v2-3",
+  "version": "1.0.0",
+  "description": "",
+  "main": "truffle-config.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node src/index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@openzeppelin/contracts": "^4.3.2",
+    "@truffle/hdwallet-provider": "^2.0.0",
+    "dotenv": "^10.0.0",
+    "web3": "^1.6.0"
+  }
+}
diff --git a/test/Flashy.test.js b/test/Flashy.test.js
new file mode 100644
index 0000000..6b1d4b2
--- /dev/null
+++ b/test/Flashy.test.js
@@ -0,0 +1,271 @@
+// For a successfull flashloan the blocknumber is required at: 13027545 
+
+const IERC20 = artifacts.require("IERC20");
+const flash = artifacts.require("Flashy");
+
+const path = require('path')
+require('dotenv').config({ path: path.resolve(__dirname, '../.env') })
+
+const Web3 = require('Web3');
+url = 'http://localhost:8545'
+const web3 = new Web3(url);
+
+// ###################################################################################      Functions for converting uint format to decimal and vice versa
+function amount_In_filter(n) {
+    return web3.utils.toWei(n.toString(), "ether");
+}
+
+function amount_Out_filter(n) {
+    return web3.utils.fromWei(n.toString(), "ether");
+}
+
+// ###################################################################################      Required addresses
+
+const token_name_erc20 = { // * Measn most important for flash loans.
+    'DAI': '0x6B175474E89094C44Da98b954EedeAC495271d0F',        //*
+    'MATIC': '0x7D1AfA7B718fb893dB30A3aBc0Cfc608AaCfeBB0',
+    'UNI': '0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984',        
+    'WETH': '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2',       //*
+    'AAVE': '0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9',
+    'COMP': '0xc00e94Cb662C3520282E6f5717214004A7f26888',
+    'USDC': '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48',       //*
+    'USDT': '0xdAC17F958D2ee523a2206206994597C13D831ec7',       //*
+    'WBTC': '0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599',       //*
+    'TOKE': '0x2e9d63788249371f1DFC918a52f8d799F4a38C94',       
+    'COTI': '0xDDB3422497E61e13543BeA06989C0789117555c5',       
+    'YEARN': '0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e',      
+    'DG': '0xEE06A81a695750E71a662B51066F2c74CF4478a0',         
+    'RARI': '0xFca59Cd816aB1eaD66534D82bc21E7515cE441CF',
+    'CRV': '0xD533a949740bb3306d119CC777fa900bA034cd52',
+    'DYDX': '0x92D6C1e31e14520e676a687F0a93788B716BEff5'
+};
+
+function swaping_keys(json){
+    var ret = {};
+    for(var key in json){
+      ret[json[key]] = key;
+    }
+    return ret;
+  }
+
+const token_address_erc20 = swaping_keys(token_name_erc20);
+
+const my_address = process.env.ADDRESS_PRIVATE_KEY_TEST1;
+
+
+// Note: Maximum 4 accounts for unlocking
+const whales = {
+    'DAI': '0x38720D56899d46cAD253d08f7cD6CC89d2c83190',
+    'COTI': '0xBDcB703937a71a01E5287cE6F5f2E12567133d1E', 
+    'WETH': '0xE8E8f41Ed29E46f34E206D7D2a7D6f735A3FF2CB',
+    'RARI': '0x72A53cDBBcc1b9efa39c834A540550e23463AAcB', 
+    'USDC': '0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8'
+};
+
+const defi = {
+    'UNI_ROUTER': '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D',
+    'SUSHI_ROUTER': '0xd9e1cE17f2641f24aE83637ab66a2cca9C378B9F',
+    'UNI_ROUTER3': '0xE592427A0AEce92De3Edee1F18E0157C05861564',
+    'AAVE': '0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5'
+};
+
+
+// ###################################################################################      Testing
+contract('Flash Loan: Aave with Sushiswap, Uniswap V2 & Uniswap V3', () => {
+    //it('Front-running part', async () => {
+    //    console.log('----------It separation ----------------------------------------------------------------------------------------------');
+    //});
+
+    it('Simulated swap on Sushiswap', async () => {
+        console.log("Swapping on Sushiswap");
+        console.log('-----------------------------------------------------------------------------------------------------------');
+        // Deploy contracts
+        const weth = await IERC20.at(token_name_erc20['WETH']);
+        const toke = await IERC20.at(token_name_erc20['TOKE']);
+
+        const swapping = await flash.new(my_address, defi['AAVE']);
+        console.log('-----------------------------------------------------------');
+        console.log('Contract address: ', swapping.address);
+
+        // Amount to fund contract for swapping for token TOKE:
+        const funding_amount = 39.8616379045;
+        
+
+        var weth_account_balance, eth_account_balance, toke_account_balance;
+        var weth_contract_balance, eth_contract_balance, toke_contract_balance;
+ 
+
+        console.log('-----------------------------------------------------------');
+        console.log('First Balance Check');
+
+        // Account:
+        weth_account_balance = await weth.balanceOf(my_address)
+        eth_account_balance = await web3.eth.getBalance(my_address);
+        toke_account_balance = await toke.balanceOf(my_address);
+        
+        // Contract: 
+        weth_contract_balance = await weth.balanceOf(swapping.address);
+        eth_contract_balance = await web3.eth.getBalance(swapping.address);
+        toke_contract_balance = await toke.balanceOf(swapping.address);
+
+        console.log(" ");
+        console.log('Account: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my account :${amount_Out_filter(weth_account_balance)}`);
+        console.log(`ETH balance of my account :${amount_Out_filter(eth_account_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my account :${amount_Out_filter(toke_account_balance)}`);
+        console.log(" ");
+        console.log('Contract: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my contract :${amount_Out_filter(weth_contract_balance)}`);
+        console.log(`ETH balance of my contract :${amount_Out_filter(eth_contract_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my contract :${amount_Out_filter(toke_contract_balance)}`);
+        console.log(" ");
+
+
+        console.log('-----------------------------------------------------------');
+        console.log('Funding contract with WETH: ');
+        await weth.transfer(swapping.address, amount_In_filter(funding_amount), {from: whales['WETH']});
+        
+
+        console.log('-----------------------------------------------------------');
+        console.log('Second Balance Check');
+
+        // Account:
+        weth_account_balance = await weth.balanceOf(my_address)
+        eth_account_balance = await web3.eth.getBalance(my_address);
+        toke_account_balance = await toke.balanceOf(my_address);
+        
+        // Contract: 
+        weth_contract_balance = await weth.balanceOf(swapping.address);
+        eth_contract_balance = await web3.eth.getBalance(swapping.address);
+        toke_contract_balance = await toke.balanceOf(swapping.address);
+
+        console.log(" ");
+        console.log('Account: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my account :${amount_Out_filter(weth_account_balance)}`);
+        console.log(`ETH balance of my account :${amount_Out_filter(eth_account_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my account :${amount_Out_filter(toke_account_balance)}`);
+        console.log(" ");
+        console.log('Contract: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my contract :${amount_Out_filter(weth_contract_balance)}`);
+        console.log(`ETH balance of my contract :${amount_Out_filter(eth_contract_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my contract :${amount_Out_filter(toke_contract_balance)}`);
+        console.log(" ");
+
+
+        console.log('-----------------------------------------------------------');
+        console.log('Swapping WETH for TOKE: ');
+        await swapping.sushi(token_name_erc20['WETH'], token_name_erc20['TOKE'], amount_In_filter(funding_amount));
+
+
+        console.log('-----------------------------------------------------------');
+        console.log('Third Balance Check');
+
+        // Account:
+        weth_account_balance = await weth.balanceOf(my_address)
+        eth_account_balance = await web3.eth.getBalance(my_address);
+        toke_account_balance = await toke.balanceOf(my_address);
+        
+        // Contract: 
+        weth_contract_balance = await weth.balanceOf(swapping.address);
+        eth_contract_balance = await web3.eth.getBalance(swapping.address);
+        toke_contract_balance = await toke.balanceOf(swapping.address);
+
+        console.log(" ");
+        console.log('Account: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my account :${amount_Out_filter(weth_account_balance)}`);
+        console.log(`ETH balance of my account :${amount_Out_filter(eth_account_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my account :${amount_Out_filter(toke_account_balance)}`);
+        console.log(" ");
+        console.log('Contract: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my contract :${amount_Out_filter(weth_contract_balance)}`);
+        console.log(`ETH balance of my contract :${amount_Out_filter(eth_contract_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my contract :${amount_Out_filter(toke_contract_balance)}`);
+        console.log(" ");
+
+        console.log('---------- END           ----------------------------------------------------------------------------------------------');
+    });
+
+  
+    it('Simulated Flash Loan', async () => {
+        console.log("Flash loan and arbitrage swapping");
+        console.log('-----------------------------------------------------------------------------------------------------------');
+        // Deploy contracts
+        const weth = await IERC20.at(token_name_erc20['WETH']);
+        const toke = await IERC20.at(token_name_erc20['TOKE']);
+
+        const contract = await flash.new(my_address, defi['AAVE']);
+        console.log('-----------------------------------------------------------');
+        console.log('Contract address: ', contract.address);
+
+        // Amount for borrowing from Aave lending Pool Provider:
+        const flashloan_amount = 14.036556890115856282;
+        
+
+        var weth_account_balance, eth_account_balance, toke_account_balance;
+        var weth_contract_balance, eth_contract_balance, toke_contract_balance;
+ 
+
+        console.log('-----------------------------------------------------------');
+        console.log('First Balance Check');
+
+        // Account:
+        weth_account_balance = await weth.balanceOf(my_address)
+        eth_account_balance = await web3.eth.getBalance(my_address);
+        toke_account_balance = await toke.balanceOf(my_address);
+        
+        // Contract: 
+        weth_contract_balance = await weth.balanceOf(contract.address);
+        eth_contract_balance = await web3.eth.getBalance(contract.address);
+        toke_contract_balance = await toke.balanceOf(contract.address);
+
+        console.log(" ");
+        console.log('Account: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my account :${amount_Out_filter(weth_account_balance)}`);
+        console.log(`ETH balance of my account :${amount_Out_filter(eth_account_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my account :${amount_Out_filter(toke_account_balance)}`);
+        console.log(" ");
+        console.log('Contract: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my contract :${amount_Out_filter(weth_contract_balance)}`);
+        console.log(`ETH balance of my contract :${amount_Out_filter(eth_contract_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my contract :${amount_Out_filter(toke_contract_balance)}`);
+        console.log(" ");
+
+
+        console.log('-----------------------------------------------------------');
+        console.log("Flash Loan.")
+        await contract.flash_loan(token_name_erc20['WETH'], token_name_erc20['TOKE'], amount_In_filter(flashloan_amount), 5, 0, 0, 0, 50);
+
+        
+        console.log('-----------------------------------------------------------');
+        console.log('Second Balance Check');
+        
+        // Account:
+        weth_account_balance = await weth.balanceOf(my_address)
+        eth_account_balance = await web3.eth.getBalance(my_address);
+        toke_account_balance = await toke.balanceOf(my_address);
+        
+        // Contract: 
+        weth_contract_balance = await weth.balanceOf(contract.address);
+        eth_contract_balance = await web3.eth.getBalance(contract.address);
+        toke_contract_balance = await toke.balanceOf(contract.address);
+
+        console.log(" ");
+        console.log('Account: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my account :${amount_Out_filter(weth_account_balance)}`);
+        console.log(`ETH balance of my account :${amount_Out_filter(eth_account_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my account :${amount_Out_filter(toke_account_balance)}`);
+        console.log(" ");
+        console.log('Contract: ');
+        console.log(`${token_address_erc20[weth.address]} balance of my contract :${amount_Out_filter(weth_contract_balance)}`);
+        console.log(`ETH balance of my contract :${amount_Out_filter(eth_contract_balance)}`);
+        console.log(`${token_address_erc20[toke.address]} balance of my contract :${amount_Out_filter(toke_contract_balance)}`);
+        console.log(" ");
+
+
+        console.log('---------- END           ----------------------------------------------------------------------------------------------');
+    });
+
+
+    
+
+});
\ No newline at end of file
diff --git a/truffle-config.js b/truffle-config.js
new file mode 100644
index 0000000..00467b7
--- /dev/null
+++ b/truffle-config.js
@@ -0,0 +1,104 @@
+/**
+ * Use this file to configure your truffle project. It's seeded with some
+ * common settings for different networks and features like migrations,
+ * compilation and testing. Uncomment the ones you need or modify
+ * them to suit your project as necessary.
+ *
+ * More information about configuration can be found at:
+ *
+ * trufflesuite.com/docs/advanced/configuration
+ *
+ * To deploy via Infura you'll need a wallet provider (like @truffle/hdwallet-provider)
+ * to sign your transactions before they're sent to a remote public node. Infura accounts
+ * are available for free at: infura.io/register.
+ *
+ * You'll also need a mnemonic - the twelve word phrase the wallet uses to generate
+ * public/private key pairs. If you're publishing your code to GitHub make sure you load this
+ * phrase from a file you've .gitignored so it doesn't accidentally become public.
+ *
+ */
+
+ const HDWalletProvider = require('@truffle/hdwallet-provider');
+ require('dotenv').config();
+ 
+ const infuraKey_ethereum = process.env.INFURA_KEY; 
+ const privatekey_ethereum = process.env.PRIVATE_KEY;
+
+module.exports = {
+  /**
+   * Networks define how you connect to your ethereum client and let you set the
+   * defaults web3 uses to send transactions. If you don't specify one truffle
+   * will spin up a development blockchain for you on port 9545 when you
+   * run `develop` or `test`. You can ask a truffle command to use a specific
+   * network from the command line, e.g
+   *
+   * $ truffle test --network <network-name>
+   */
+
+  networks: {
+    // Useful for testing. The `development` name is special - truffle uses it by default
+    // if it's defined here and no other network is specified at the command line.
+    // You should run a client (like ganache-cli, geth or parity) in a separate terminal
+    // tab if you use this network and you must also set the `host`, `port` and `network_id`
+    // options below to some value.
+    //
+    development: {
+     host: "127.0.0.1",     // Localhost (default: none)
+     port: 8545,            // Standard Ethereum port (default: none)
+     network_id: "*",       // Any network (default: none)
+    },
+    // Another network with more advanced options...
+    // advanced: {
+    // port: 8777,             // Custom port
+    // network_id: 1342,       // Custom network
+    // gas: 8500000,           // Gas sent with each transaction (default: ~6700000)
+    // gasPrice: 20000000000,  // 20 gwei (in wei) (default: 100 gwei)
+    // from: <address>,        // Account to send txs from (default: accounts[0])
+    // websockets: true        // Enable EventEmitter interface for web3 (default: false)
+    // },
+    // Useful for deploying to a public network.
+    // NB: It's important to wrap the provider as a function.
+    // ropsten: {
+    // provider: () => new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/YOUR-PROJECT-ID`),
+    // network_id: 3,       // Ropsten's id
+    // gas: 5500000,        // Ropsten has a lower block limit than mainnet
+    // confirmations: 2,    // # of confs to wait between deployments. (default: 0)
+    // timeoutBlocks: 200,  // # of blocks before a deployment times out  (minimum/default: 50)
+    // skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
+    // },
+    ethereum_mainnet: {
+      provider: () => new HDWalletProvider(privatekey_ethereum, `https://mainnet.infura.io/v3/${infuraKey_ethereum}`),
+      network_id: 1,       
+      gas: 5500000,        
+      confirmations: 2,    // # of confs to wait between deployments. (default: 0)
+      timeoutBlocks: 50,  // # of blocks before a deployment times out  (minimum/default: 50)
+      skipDryRun: true     // Skip dry run before migrations? (default: false for public nets )
+      },
+    // Useful for private networks
+    // private: {
+    // provider: () => new HDWalletProvider(mnemonic, `https://network.io`),
+    // network_id: 2111,   // This network is yours, in the cloud.
+    // production: true    // Treats this network as if it was a public net. (default: false)
+    // }
+  },
+
+  // Set default mocha options here, use special reporters etc.
+  mocha: {
+    // timeout: 100000
+  },
+
+  // Configure your compilers
+  compilers: {
+    solc: {
+      version: "0.8.0",    // Fetch exact version from solc-bin (default: truffle's version)
+      // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
+      // settings: {          // See the solidity docs for advice about optimization and evmVersion
+      //  optimizer: {
+      //    enabled: false,
+      //    runs: 200
+      //  },
+      //  evmVersion: "byzantium"
+      // }
+    }
+  }
+};