Practical Flash Loan Arbitrage with Solidity and TypeScript

Name: Practical Flash Loan Arbitrage with Solidity and TypeScript
Rating: 4.0 (87 reviews)

Get started on Flashloan Arbitrage on Polygon with Solidity and Typescript.

Created byGabriel Marian

Last updated 8/2024

English

What you'll learn

How to build a fee-less FlashLoan Smart Contract using Solidity
How to read token prices on-chain live
How to build Arbitrage scripts with Typescript and Ethers
How Flashloans work behind and how to execute them on the Mainnet

Course content

5 sections • 41 lectures • 2h 55m total length

What is a Flashloan ?1:25
Tips for a good Flashloan3:12
learn to exploit flash loan arbitrage using collateral-free, instant loans, real-time market data, and efficient smart contracts to quickly identify profitable opportunities while managing risk and compliance.

Writing the IFlashLoan Interface4:13
DodoBase Contract5:03
Writing the IDODOInterface1:58
Define the IDODOInterface in Solidity with a flash run function and four external view functions: base token, base reserve, code token, and code reserve.
Explaining how our Flashloan contract will work1:28
DodoSwap Mainnet Contract - High Level Overview1:23
How the Flashloan will work1:37
Writing the IFlashLoanValidation Contract2:43
Writing the Withdraw Contract2:46
Writing the IDodoProxy Interface1:01

Writing the approve token function1:47
Writing the execute flashloan function8:39
Write the execute flash loan function, encode params with abi encode, determine the loan token via route utils, and trigger the flash loan on the dodo pool with hardhat debugging.
Writing the flashloan callback2:02
Writing the route loop function4:29
Writing the hop loop function2:51
Writing the pick protocol function3:29
Quick Recap1:16
Writing the UniswapV3 function5:16
Writing the UniswapV2 function2:13
Writing the DodoSwapV2 function3:53
Finishing the flashloan callback4:29

What is sqrtPrice ?1:23
Writing the Quoter script6:31
Writing a deploy contract script3:11
Writing the execute flashloan script3:33
Write an execute flash loan script that constructs a flash loan transaction by obtaining the contract instance from address, abi, and signer, building flash params, and returning the transaction.
How to find router by protocol id0:39
Writing unit tests11:57
Write unit tests for a flash loan arbitrage contract, setting up a provider and wallet on polygon fork, deploying the contract, and executing multi-hop arbitrage through Uniswap v2 and SushiSwap.
Writing the funding script6:55
Finishing the unit tests12:00
Finish unit tests for a Solidity flash loan arbitrage flow, including setting up ERC20 token contracts, impersonation, executing a flash loan, and validating profits with chai.
How to get price of tokens in USDC5:28
Writing the Arbitrage script - Part 19:23
Writing the Arbitrage script - Part 27:19
Write the arbitrage flash loan logic in Solidity and TypeScript, configure provider, wallet, and contract, and build params to act on price differences between Uniswap and SushiSwap.
How to analyze transactions with Phalcon4:55
Fork the polygon network with the Falcon dashboard to simulate a flash loan on a mainnet fork. Deploy the flash loan contract and debug transactions with a visual debugger.
Running a Flashloan on Phalcon fork12:36
Gas Optimization for our Flashloan Contract1:40
Tips and Tricks about Flashloan Arbitrage3:41
Explore practical flash loan arbitrage techniques across multiple platforms, emphasize speed with AWS and automated checks, and understand slippage and liquidity risks in automated market maker pools.
Taking care of "amountOutMin" parameter7:58
Overview of DODO Pool contract used for Flashloan1:55

Let's analyze a real Flashloan Arbitrage transaction.3:01
An MF bot executes a flash loan arbitrage across Balancer, Curve, Wiper, and SushiSwap, converting 8.3 atm to 8.71 wrapped Ethereum and earning 0.39 ether (~$1,000).
Executing our Flashloan Arbitrage on the Mainnet4:35
Execute a flash loan arbitrage on mainnet by funding contract with wrapped ether, borrow 0.1 wETH, swap to usdc on sushi, swap back on quick swap, repay loan, collect profit.

Requirements

Basic Programming experience in Typescript, Solidity and Ethers

Description

Dive into the exciting world of decentralized finance (DeFi) with my comprehensive course on building Flash Loan Arbitrage Bots using Solidity and JavaScript. In this hands-on and immersive learning experience, you will master the art of leveraging flash loans to execute profitable arbitrage strategies within the Polygon blockchain.

What You'll Learn:

Flash Loans Fundamentals:
- Gain a deep understanding of flash loans, exploring how they work and their unique capabilities within the DeFi ecosystem.
Smart Contract Development with Solidity:
- Learn Solidity, the language of smart contracts on the Polygon blockchain, from the ground up.
- Explore advanced Solidity concepts necessary for developing robust and secure flash loan arbitrage bots.
Arbitrage Strategies:
- Discover various arbitrage opportunities in the DeFi space and how to identify them.
- Design and implement effective strategies to capitalize on price differentials across decentralized exchanges.
Integration with Web3 and JavaScript:
- Master the integration of smart contracts with Web3.js, enabling seamless communication between your flash loan arbitrage bot and the Polygon blockchain.
- Develop and deploy JavaScript scripts to interact with and manage your smart contracts efficiently.
Security Best Practices:
- Understand the importance of security in DeFi applications and implement best practices to safeguard your flash loan arbitrage bot against potential vulnerabilities.
Real-world Deployment:
- Put your skills to the test by deploying your flash loan arbitrage bot on the Polygon mainnet.
- Learn how to monitor, analyze, and optimize your bot's performance in real-world conditions.

Who Should Take This Course:

Blockchain developers looking to enhance their skills in smart contract development and DeFi.
Entrepreneurs and traders interested in exploring innovative financial opportunities within the decentralized landscape.
Anyone passionate about learning the intricacies of flash loans and building sophisticated arbitrage bots.

Prerequisites:

Advanced understanding of blockchain concepts and Solidity.
Familiarity with programming languages, especially JavaScript and Typescript.

Who this course is for:

Middle Blockchain/Web3 Developers

Practical Flash Loan Arbitrage with Solidity and TypeScript

What you'll learn

Explore related topics

Course content

Introduction2 lectures • 5min

Writing Interfaces and Helpers9 lectures • 22min

Writing the Flashloan Smart Contract11 lectures • 40min

Arbitrage Scripts & Tests17 lectures • 1hr 41min

Mainnet Flashloan Execution2 lectures • 8min

Requirements

Description

Who this course is for: