Marketplace Smart Contract

This Solidity smart contract is designed to create a marketplace for buying and selling ERC721 tokens. The contract uses the OpenZeppelin library for security and reentrancy protection.

Contract Structure

The contract has the following main components:

1. makeItem: Allows users to list their ERC721 tokens for sale.
2. purchaseItem: Allows users to buy listed ERC721 tokens.
3. getTotalPrice: Calculates the total price including the fee.

Dependencies

This contract depends on the following OpenZeppelin libraries:

1. @openzeppelin/contracts/token/ERC721/IERC721.sol: Interface for ERC721 tokens.
2. @openzeppelin/contracts/security/ReentrancyGuard.sol: Reentrancy guard to prevent reentrancy attacks.

Setting Up the Contract on Local Environment

To set up this contract on a local environment, follow these steps:

1. Install Solidity compiler: Download and install the latest version of the Solidity compiler from the official website (https://solidity.readthedocs.io/en/latest/installing-solidity.html).

2. Install Hardhat: Hardhat is a development environment for Ethereum. Install it using npm:

npm install -g hardhat

3. Deploy smart contracts locally

npx hardhat run ./src/backend/scripts/deploy.js --network localhost

4. Run the environment

npx hardhat node