# DiagonAlley

Welcome to the **DiagonAlley** platform, a revolutionary Real World Asset (RWA) rental platform that integrates NFTs on the **Neo X** blockchain. This platform leverages blockchain's timestamping capabilities to enforce rental periods through time-limited NFTs, ensuring a secure and transparent transaction environment.
Bilingual Demo Video (Chinese and English Subtitles): https://www.youtube.com/watch?v=cN-FSbvJXJ0

## Features

- **MetaMask Payment and Authentication**: Connect and transact on the platform using your MetaMask wallet without the need for additional login steps.

- **RWA Integration**: Real assets are represented on-chain through NFTs, allowing for the purchase and transfer of physical goods ownership via NFTs.

- **Smart Contract Management**: Our smart contracts facilitate price verification, NFT minting and transfer, and support multiple cryptocurrencies.

## Technology Stack

- **Frontend**: React.js, MetaMask API

- **Backend**: Go, Gin Framework

- **Database**: PostgreSQL (for storing transaction history and data)

- **Smart Contracts**: Solidity, Foundry development framework

## Workflow

```mermaid

graph TD

   A[User connects via frontend using MetaMask] --> B[Frontend retrieves user's NFT address]

   B --> C[Frontend displays specific NFT]

   C --> D[User selects rental period]

   D --> E[User initiates purchase request]

   subgraph Contract Logic

       E --> F[Smart contract generates a time-limited NFT]

       F --> G[Set destruction time and deposit]

       G --> H[If destroyed within time: refund deposit]

       G --> I[If not destroyed within 5 minutes past time: anyone can destroy]

       I --> J[Deposit not refunded]

   end

   E --> K[Frontend sends transaction data to backend]

   K --> L[Backend stores transaction data in PostgreSQL]

   subgraph Password Query Process

       M[User accesses password query page] --> N[User connects via MetaMask]

       N --> O[Timestamp verification via NFT]

       O --> P[If verified, display room password]

   end

```

## Smart Contract Details

- **Development Tools**: Developed and tested using **Foundry**.

- **Standards**: NFTs are minted and transferred adhering to **ERC-721** or **ERC-1155** standards.

## Backend Architecture

- **Backend Language**: Developed using **Go** and **Gin Framework**.

- **Database**: **PostgreSQL** is used as the backend database.