Prompt Web3
  • 🤓Web3 Refresher Course with GptTutor
  • Creating your own Custom personas
  • Creating The Web3 GptTutor
  • Prompting the course sylibus
  • Prompting new lessons
  • Expanding parts of a lesson
  • 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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  • Assignment 1:
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  1. Lesson 4

Lesson 4: Assignments & Exercises

Assignments and Practical Exercises

Assignment 1:

  • Write a brief essay explaining the differences between require, revert, and assert, and provide scenarios where each is appropriate.

Exercise 1:

  • Create a smart contract implementing a simple banking system with functions for deposit and withdrawal. Use require statements for validating conditions.

Exercise 2:

  • Modify the above contract to include events for each deposit and withdrawal action. Test the contract to ensure that events are emitted correctly.

This lesson will help you understand how to make your smart contracts more reliable and informative through proper error handling and the use of events. These concepts are essential for creating robust and user-friendly smart contracts. Once you've completed this lesson, you'll have a deeper understanding of how to manage errors and provide feedback to users and front-end applications.

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Last updated 1 year ago