Energy Certificates

Enhanced Technical Documentation for Energy Certificate Integration in Real Estate Contract

The integration of energy certificates into our Real Estate Contract enhances the value proposition of our tokenized real estate assets. Utilizing the ERC1155 contract, we mint two distinct types of energy certificates as non-fungible tokens (NFTs), which are crucial components of every real estate transaction. This documentation details the enhanced code structure and functionalities associated with these energy certificates.

Enhanced Code Structure for Energy Certificates

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract RealEstateToken is ERC1155, Ownable {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIdCounter;

    struct Bedarfsausweis {
        uint buildingYear;
        uint buildingSize;
        string energyEfficiencyClass;
        float primaryEnergyDemand;
        string[] renovationRecommendations;
        string energySourceHeating;
        string energySourceWarmWater;
        string certificateID;
        uint issueDate;
        uint expiryDate;
    }

    struct Verbrauchsausweis {
        uint buildingYear;
        uint buildingSize;
        string energyEfficiencyClass;
        float actualEnergyConsumption;
        string energySourceHeating;
        string energySourceWarmWater;
        string certificateID;
        uint issueDate;
        uint expiryDate;
    }

    mapping(uint256 => Bedarfsausweis) public bedarfsausweise;
    mapping(uint256 => Verbrauchsausweis) public verbrauchsausweise;

    // Function to mint property with energy certificates
    function mintPropertyWithCertificates(
        Property memory newProperty,
        Bedarfsausweis memory newBedarfsausweis,
        Verbrauchsausweis memory newVerbrauchsausweis,
        address to, uint256 amount
    ) external onlyOwner {
        uint256 currentTokenId = _tokenIdCounter.current();
        properties[currentTokenId] = newProperty;

        // Mint the real estate tokens
        _mint(to, currentTokenId, amount, "");
        _tokenIdCounter.increment();

        // Store the energy certificates linked with the property
        bedarfsausweise[currentTokenId] = newBedarfsausweis;
        verbrauchsausweise[currentTokenId] = newVerbrauchsausweis;
    }

    // Functions to access energy certificates
    function accessBedarfsausweis(uint256 propertyTokenId) external view returns (Bedarfsausweis memory) {
        return bedarfsausweise[propertyTokenId];
    }

    function accessVerbrauchsausweis(uint256 propertyTokenId) external view returns (Verbrauchsausweis memory) {
        return verbrauchsausweise[propertyTokenId];
    }

    // ... (rest of the functions)
}

Key Enhancements and Functionalities

1. Energy Certificate Structs: Defined structs Bedarfsausweis and Verbrauchsausweis encapsulate detailed information about the energy certificates, including efficiency class, energy demand, and source.

2. Minting Function Enhancement: The mintPropertyWithCertificates function now handles the minting of real estate tokens along with the association of the corresponding energy certificates. This ensures that each property token is intrinsically linked to its energy certificates.

3. Access Functions: Functions accessBedarfsausweis and accessVerbrauchsausweis enable external querying of energy certificate details based on the property token ID. This provides transparency and easy access to certificate information.

4. Mapping of Certificates: The use of mappings bedarfsausweise and verbrauchsausweise links each property token with its respective energy certificates, ensuring that the data is stored efficiently and is easily retrievable.

Conclusion

The enhanced integration of energy certificates within the Real Estate Token contract adds significant value and transparency to the tokenized real estate assets. By meticulously structuring and linking energy certificates to the real estate tokens, the platform provides a comprehensive view of each property's energy characteristics, thus enriching the asset's data profile. This integration aligns with our commitment to providing detailed and valuable asset information to potential investors and stakeholders in the real estate tokenization market.