# Flashloan Arbitrage error ‘SafeERC20: low-level call failed’

So I finally am almost finished with my flashloan arbitrage how ever when I run it I get this error

``'SafeERC20: low-level call failed' ``

here is my contract code

``// SPDX-License-Identifier: MIT pragma solidity 0.8.4;  import "https://github.com/sushiswap/sushiswap/blob/master/contracts/uniswapv2/interfaces/IUniswapV2Router01.sol"; import { ILendingPool, ILendingPoolAddressesProvider, IERC20 } from "./Interfaces.sol"; import { FlashLoanReceiverBase } from "./FlashLoanReceiverBase.sol"; import { Withdrawable } from "./Withdrawable.sol"; import { SushiswapToQuickswap, QuickswapToSushiswap } from "./Arbitrage.sol";  /**  !!! Never keep funds permanently on your FlashLoanReceiverBase contract as they could be  exposed to a 'griefing' attack, where the stored funds are used by an attacker. !!!  */      contract FlashloanSushiswapToQuickswap is FlashLoanReceiverBase, Withdrawable {      address Sushiswap_Router = 0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506;     address Quickswap_Router = 0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff;      address Tether = 0xc2132D05D31c914a87C6611C10748AEb04B58e8F;     address Wmatic = 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270;     uint256 Amount = ( 1000000 * 1e18 );      IERC20 token;      constructor(ILendingPoolAddressesProvider _addressProvider)      FlashLoanReceiverBase(_addressProvider) {         }      /**      * @dev This function must be called only be the LENDING_POOL and takes care of       repaying      * active debt positions, migrating collateral and incurring new V2 debt token debt.      *      * @param assets The array of flash loaned assets used to repay debts.      * @param amounts The array of flash loaned asset amounts used to repay debts.      * @param premiums The array of premiums incurred as additional debts.      * @param initiator The address that initiated the flash loan, unused.      * @param params The byte array containing, in this case, the arrays of aTokens and       aTokenAmounts.      */   function executeOperation(     address[] calldata assets,     uint256[] calldata amounts,     uint256[] calldata premiums,     address initiator,     bytes calldata params )     external     override     returns (bool) {          // This contract now has the funds requested.     // Your logic goes here.     uint Start = IERC20(Tether).balanceOf(address(this));     token.approve(Sushiswap_Router, Amount);     token.approve(Quickswap_Router, Amount);      address[] memory path1 = new address[](2);     path1[0] = address(Tether);     path1[1] = address(Wmatic);      IUniswapV2Router01(Sushiswap_Router).swapExactTokensForTokens     (Amount, Amount, path1, address(this), block.timestamp + 300);      address[] memory path2 = new address[](2);     path2[0] = address(Wmatic);     path2[1] = address(Tether);      IUniswapV2Router01(Quickswap_Router).swapExactTokensForTokens     (Amount, Amount, path2, address(this), block.timestamp + 300);      uint End = IERC20(Tether).balanceOf(address(this));     require(End > Start, "No Profit Made");      // At the end of your logic above, this contract owes     // the flashloaned amounts + premiums.     // Therefore ensure your contract has enough to repay     // these amounts.      // Approve the LendingPool contract allowance to *pull* the owed amount     for (uint i = 0; i < assets.length; i++) {         uint amountOwing = amounts[i]+(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);      address onBehalfOf = address(this);     bytes memory params = "";     uint16 referralCode = 0;      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;     }      LENDING_POOL.flashLoan(         receiverAddress,         assets,         amounts,         modes,         onBehalfOf,         params,         referralCode     ); }  /*  *  Flash loan wei amount worth of `_asset` 304061637379130  */ function flashloan(address _asset, uint256 _amount) public {     bytes memory data = "";     uint amount = _amount;      address[] memory assets = new address[](1);     assets[0] = _asset;      uint256[] memory amounts = new uint256[](1);     amounts[0] = ( amount * 1e18 );      _flashloan(assets, amounts); }  } ``

my javascript code is like this

``var ethers = require('ethers'); var IUniswapV2Router02 = require('./IUniswapV2Router02.json') var SushiToQuick = require('./SushiToQuick.json'); var QuickToSushi = require('./QuickToSushi.json'); const maticProvider = new ethers.providers.JsonRpcProvider(procces.env.provider_url);  const TETHER = '0xc2132D05D31c914a87C6611C10748AEb04B58e8F'; const WMATIC = '0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270'; const TETHER_ = ['0xc2132D05D31c914a87C6611C10748AEb04B58e8F'];    const Amount = '1000000';   const Amount_ = ['1000000'];   const Premiums = ['1'];    const SushiToQuickflashloanAddress = "0x4Ccb64D17eB9DaB48A5F0C51a27fC1E277708D69";   const QuickToSushiFlashloanAddress = "0x50332903B054d381cD1De30166683dA4A6d79174";   const SushiRouterAddress = "0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506";   const QuickRouterAddress = "0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff";    const private_key = process.env.privateKey;   const myAccount = "0x39D780E2e82b76fCE187C5d4b080E2DD6b32F746";    if ( private_key === undefined) { throw new Error("Private key is not defined");   }   async function SushiTetherToWmaticFlashloanArbitrage() {  const signer = new ethers.Wallet( private_key, maticProvider );  const SushiToQuickFlashloan = new ethers.Contract(SushiToQuickflashloanAddress,  SushiToQuick, signer); const SushiRouter = new ethers.Contract(SushiRouterAddress, IUniswapV2Router02, signer); const QuickRouter = new ethers.Contract(QuickRouterAddress, IUniswapV2Router02, signer); const SushiScanTetherToWmatic = await SushiRouter.getAmountsOut(Amount, [TETHER,  WMATIC]); const QuickScanTetherToWmatic = await QuickRouter.getAmountsOut(Amount, [TETHER, WMATIC]);          if (SushiScanTetherToWmatic >= ( QuickScanTetherToWmatic + ( QuickScanTetherToWmatic / 100         * 1 ))) {         console.log("Trade Is Profitable")            await SushiToQuickFlashloan.flashloan(TETHER, Amount, { gasPrice:          ethers.utils.parseUnits('30000', 'gwei'), gasLimit: 2500000          } )        SushiToQuickflashloanAddress, 0x000000000, { gasPrice:         ethers.utils.parseUnits('30000',        'gwei'), gasLimit: 2500000 } )       }     else { console.log("No Opportunities For This Trade");         }     }   SushiTetherToWmaticFlashloanArbitrage(); ``

I don’t know what it could be as the tokens are being approved and the get amounts out should make sure that it’s profitable so I don’t seem to know why it doesn’t work here is the failed transaction https://polygonscan.com/tx/0x9eccd2f85e4154fb186c410557906adcd7222548e2b3cbbee2c55f9bfae69f67

How to break RSA when \$c = (secret * e) pmod n \$?

In a challenge I participated recently, I was given:

$$n = p * q$$

$$e = 463671$$

$$c = (secret * e) pmod n$$

The $$e$$ has a comment attatched that said "fermat" and nothing more. Maybe it could be decrypted with some Fermat theorem? Note however, that $$p$$ and $$q$$ are strong primes and not
close since both are obtained using python’s `p = getPrime(2048)`

Any ideas?

#### Flashloan Arbitrage error ‘SafeERC20: low-level call failed’

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