ERC721 Exercise 1

Intro

Your goal is to create an ERC721 token (NFT), based on OpenZeppelin ERC721.sol contract, deploy it to your local hardhat chain, and test it.

Accounts

• 0 - Deployer
• 1 - User1
• 2 - User2

Tasks

Task 1

Create your contract under the ./contracts/erc721-1 folder:

1. Import and inherit from OpenZeppelin ERC721.sol contract
2. Choose your token NAME and SYMBOl
3. Implement an external mint() function according the following properties:
   1. Max Supply = 10,000
   2. Mint Price = 0.1 ETH
4. Keep track of the current supply using a public state variable

Task 2

Testing:

1. Deploy your contract from the deployer account
2. Mint 5 tokens from Deployer
3. Mint 3 Tokens from User1
4. Test that every account has the right amount of tokens
5. Transfer 1 token from User1 to User2 (Token ID 6)
6. Make sure that the token that was transfered is now owned by User2
7. From Deployer: approve User1 to spend one of the tokens (Token ID 3)
8. Test that User1 has the right approval that was granted by the Deployer
9. From User1: transfer to yourself the token that was approved by the Deployer
10. Test that User1 owns the transfered token
11. Test that every user has the right amount of tokens

Links that might be useful

1. ERC721 Standard on Ethereum Website https://eips.ethereum.org/EIPS/eip-721
2. ERC721 Source code on Github https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol
3. Hardhat Tests https://hardhat.org/tutorial/testing-contracts