Ethernaut challenges

Image by Amir Zand

Welcome Ethernauts! This repo contains a list of challenges you may want to try to conquer while learning Solidity and Web3 development. Please feel free to PR new challenges, and share your solutions in our discord.

Challenge 1 - Diamond Hands

Difficulty

• Solidity: Easy
• dApp: n/a

Objectives

• Build a diamond hands contract that allows users to deposit ETH. Every time they deposit ETH, it will be locked for two years.
• After two years, they will be able to withdraw the ETH.
• Full unit test coverage: your implementation should run unit tests on the contract and actually confirm all of its functionality.

Hints

• Use hardhat - it has everything you need to compile, run a local chain, run unit tests, skip forward in time, etc.

Challenge 2 - AAVE Ejector

Difficulty

• Solidity: Medium
• dApp: n/a

Objectives

• Build a contract that can help you close an AAVE position with multiple collateral and borrow asset types.
• You may use AAVE's "pay with collateral" feature, or flash loans.
• Ability to test your solution against any AAVE position via mainnet forking and account impersonation.
• Full unit test coverage: your implementation should run unit tests on the contract and actually confirm all of its functionality.

Hints

• Use hardhat - it has everything you need for this task.

Challenge 3 - Yield Farm

Difficulty

• Solidity: Medium
• dApp: Medium

Objectives

• Build a Yield Farm that allows anyone to deposit tokens and gain yield.
• The Yield Farm needs to implement at least one token that is not the governance token.
• Needs to contain at least 2 pools and 2 Farms.
• Full unit test coverage: your implementation should run unit tests on the contract and actually confirm all of its functionality.

Hints

• Use hardhat for unit testing
• You can use Pancake or Uniswap dApp models for the frontend

Challenge 4 - NFT staking

Difficulty

• Solidity: Easy
• dApp: n/a

Objectives

• Build an NFT Staking contract that will reward the users with a custom ERC20 token based on their staking period that they choose.
• Example: I can stake my NFT for 1 month and I get a reward of X%, I stake it for 6 months and I get a reward of 2X% and so on.
• The NFTs that are used for staking must be also present in a custom OpenSea collection.
• Full unit test coverage: your implementation should run unit tests on the contract and actually confirm all of its functionality.

Hints

• Use hardhat for unit testing
• Use Rinkeby for OpenSea testnet