HemProp - Decentralized Real Estate Marketplace

HemProp is a decentralized application (dApp) built on the Ethereum blockchain that facilitates the buying, selling, and reviewing of real estate properties. This smart contract, written in Solidity, powers the core functionality of the HemProp platform.

Features

• Create and manage property listings
• Buy and sell properties using cryptocurrency
• Leave and manage reviews for properties
• ERC721 compliant (Non-Fungible Tokens for properties)
• Owner controls and service fee implementation

Smart Contract Overview

The HemProp contract inherits from OpenZeppelin's ERC721, Ownable, and ReentrancyGuard contracts, providing standard NFT functionality, ownership controls, and protection against reentrancy attacks.

Key Structures

• PropertyStruct: Represents a real estate property
• ReviewStruct: Represents a review for a property
• SaleStruct: Represents a property sale transaction

Main Functions

1. createProperty: List a new property for sale
2. updateProperty: Modify an existing property listing
3. deleteProperty: Remove a property listing
4. buyProperty: Purchase a listed property
5. createReview: Leave a review for a property
6. updateReview: Modify an existing review
7. deleteReview: Remove a review

View Functions

• getProperty: Retrieve details of a specific property
• getAllProperties: Get a list of all available properties
• getMyProperty: Get a list of properties owned by the caller

Getting Started

To interact with the HemProp contract, you'll need:

1. An Ethereum wallet (e.g., MetaMask)
2. Some ETH for gas fees and property purchases
3. A connection to an Ethereum network (mainnet or testnet)

Development

This project uses Solidity version >=0.8.0 <0.9.0. To set up the development environment:

1. Install Hardhat
2. Clone this repository
3. Install dependencies: npm install
4. Compile the contract: truffle compile or npx hardhat compile
5. Deploy to a local blockchain or testnet

Security

The contract includes several security measures:

• ReentrancyGuard for buyProperty function
• Access control checks for property and review management
• Input validation for all user-provided data

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Disclaimer

This smart contract is provided as-is. Users should conduct their own research and security audits before using it in a production environment.