Prompt Web3
  • 🤓Web3 Refresher Course with GptTutor
  • Creating your own Custom personas
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  • Lesson 1
    • Lesson 1: Outline
    • Lesson 1: Assignments & Exercises
      • A1: Smart contracts in the real world
      • E1: HelloWorld.sol
  • Lesson 2
    • Lesson 2: Outline
    • Lesson 2: Assignments & Exercises
      • A1: Ethereum gas costs, data types and control structures - A brief take
      • E1: AssetManagement.sol
    • Lesson 2: Final notes and code repos
  • Lesson 3
    • Lesson 3: Outline
    • Lesson 3: Assignments & Excercises
      • A1 - Notes on View and Pure modifiers in Solidity
      • E1: EthWallet.sol
      • E1: Hardhat Tests
      • E1: NextJs Front End
    • Lesson 3: Final notes & Final project + repo
  • Lesson 4
    • Lesson 4: Outline
    • Lesson 4: Assignments & Exercises
      • A1 - Solidity error handling - notes on require, revert and assert
      • E1: EthWallet.sol - Update
      • E1 - EthWallet.test.js - Update
      • E1: NextJs Front End - Update
    • Lesson 4: Final notes & Final project + repo
  • Lesson 5
    • Lesson 5: Outline
    • Lesson 5: Assignments & Exercises
      • A1 - Using structs and mappings to manage complex data in Solidity
      • E1 - OrderSystem.sol
      • E1 - OrderSystem.test.js
    • Lesson 5: Final notes & Project Repo
  • LESSON 6
    • Lesson 6: Outline
    • Lesson 6: Assignments & Exercises
      • A1 - Solidity Interfaces - Facilitating interaction, modularity and Dapp upgradability
      • E1 - Ranked Choice Voting system
        • E1 - BallotContract.sol
        • E1 - IBallotContract.sol
        • E1 - VotingContract.sol
        • E1 - RCVotingSystem.test.js
      • E1 - Feedback
    • Lesson 6: Final notes & Project Repo
  • Lesson 7
    • Lesson 7: Outline
    • Lesson 7: Assignments & Exercises
      • E1 - Uniswap Flashswap dual Arbitrage Bot
        • E1 - FlashSwapV3.sol
        • E1 - dualArbScan.js
        • E1 - arbQuote.js
      • Lesson 7: Final notes & Project Repo
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  • The code
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  1. Lesson 7
  2. Lesson 7: Assignments & Exercises

E1 - Uniswap Flashswap dual Arbitrage Bot

I want to make a Flashloan tri arbitrage Bot. They project aims for the V1 version are below.

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Last updated 10 months ago

The code

I will only post the key bits of code in here, because there are many different files. This was my first foundry project. However, I did also try to use hardhat as well, to help run the arbScanner, which was written in javascript. The original aims are below. Since writing them, I learned about uniswap flashswaps and felt that they would be more appropriate for this project.

Original Project Aims

Create a solidity arbitrage bot that Uses flashloans, to execute triangular arbitrage in the Base L2 blockchain.

The Bot should consist of:

  • 2 Interface groups

    • 1 for Uniswap token swaps and pair information

    • 1 for Aave flashloans

  • 1 upgradable base contract, using the proxy upgrade pattern.

Execution:

  • The bot should search for opportunities in list of high liquidity pairs. Say 5-10 different tokens to start with.

  • the bot should only execute if the trade is profitable after fees, gas and depth have been taken into account.