Real Estate Registry | The Graph

Buy, sell, and manage your properties with Real Estate Registry (ESR), using The Graph protocol. Track bid and transaction history. Buy in ETH and convert ETH to INR.

Subgraph | darkLooters

https://testnet.thegraph.com/explorer/subgraphs/FgZp62jkWu3qkmw82Z5xoWMzQws9xYhHtyUHA5gPmja5?view=Query&chain=arbitrum-sepolia

Query Our Subgraph

https://gateway-testnet-arbitrum.network.thegraph.com/api/{api-key}/subgraphs/id/FgZp62jkWu3qkmw82Z5xoWMzQws9xYhHtyUHA5gPmja5

Usage

curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"query": "{ confirmations(first: 5) { id owner operation blockNumber } revokes(first: 5) { id owner operation blockNumber } }", "operationName": "Subgraphs", "variables": {}}' \
  https://gateway-testnet-arbitrum.network.thegraph.com/api/{api-key}/subgraphs/id/FgZp62jkWu3qkmw82Z5xoWMzQws9xYhHtyUHA5gPmja5

const { request, gql } = require('graphql-request');

const endpoint = 'https://gateway-testnet-arbitrum.network.thegraph.com/api/{api-key}/subgraphs/id/FgZp62jkWu3qkmw82Z5xoWMzQws9xYhHtyUHA5gPmja5';

const query = `{
  confirmations(first: 5) {
    id
    owner
    operation
    blockNumber
  }
  revokes(first: 5) {
    id
    owner
    operation
    blockNumber
  }
}`;

async function fetchData() {
  try {
    const data = await request(endpoint, query);
    console.log(data);
  } catch (error) {
    console.error('Error fetching data:', error);
  }
}

fetchData();

GraphQL EndPoints

1. propertiesWithGraph

query {
  propertiesWithGraph {
    id
    name
    details
    priceINR
    priceETH
    walletAddress
  }
}

2. propertiesByWallet

query($walletAddress: String!) {
  propertiesByWallet(walletAddress: $walletAddress) {
    id
    name
    details
    priceINR
    priceETH
    walletAddress
  }
}

3. confirmations

query {
  confirmations {
    id
    blockNumber
    transactionHash
  }
}

4. revokes

query {
  revokes {
    id
    blockNumber
    transactionHash
  }
}

5. createProperty

mutation {
  createProperty(
    name: "Test Property"
    details: "This is a test property"
    priceINR: 100
    priceETH: 0.1
    walletAddress: "0x1234567890abcdef"
  ) {
    id
    name
    details
    priceINR
    priceETH
    walletAddress
  }
}

6. getProperty

query($id: String!) {
  getProperty(id: $id) {
    id
    name
    details
    priceINR
    priceETH
    walletAddress
  }
}

7. registerUser

mutation {
  registerUser(
    walletAddress: "0x1234567890abcdef"
  ) {
    id
    walletAddress
    testTokens
  }
}

8. transferProperty

mutation {
  transferProperty(
    propertyId: "1234567890abcdef"
    newOwner: "0x9876543210fedcba"
  ) {
    message
  }
}

Smart Contract

contract-protocol\contracts\registry.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract PropertyRegistry {
    struct Property {
        uint256 id;
        string description;
        address owner;
    }

    mapping(uint256 => Property) public properties;
    uint256 public nextPropertyId;

    event PropertyRegistered(uint256 id, address owner, string description);
    event PropertyTransferred(uint256 id, address from, address to);

    function registerProperty(string memory _description) public {
        properties[nextPropertyId] = Property(nextPropertyId, _description, msg.sender);
        emit PropertyRegistered(nextPropertyId, msg.sender, _description);
        nextPropertyId++;
    }

    function transferProperty(uint256 _propertyId, address _newOwner) public {
        require(properties[_propertyId].owner == msg.sender, "Only the owner can transfer the property");
        properties[_propertyId].owner = _newOwner;
        emit PropertyTransferred(_propertyId, msg.sender, _newOwner);
    }

    function getProperty(uint256 _propertyId) public view returns (Property memory) {
        return properties[_propertyId];
    }
}