Energy performance Chain

Goal

The Energy Performance Chain is a decentralized application that considers the energy spending of companies comparing them to other companies of similar industries, sizes and locations.

Companies are compared on the following categories:

• Amount of energy used

• Green energy usage

• Energy sharing of companies

The energy performance chain periodically mints an NFT for every company listed, the NFT's metadata is generated depending on their ranking in the beforementioned categories.

Logic

Companies can sign up using the website, they have to link their metamask account which will come to own the NFT. After signing up their information gets stored on a .CSV file on the server. Then, utilizing a timer, every month the server compares companies in the same region and industry:

const createImage = async (_id) =>
{
  const width = 100;
  const height = 100;
  const maxColor = 255;
  //calculating colors
  const yellowColor = 0.5;
  const colorVariable = (companyData[_id][1] - averageEfficiency) / (2 * averageEfficiency) + yellowColor;
  let red = Math.round(maxColor * colorVariable);
  let green = Math.round(maxColor * (1 - colorVariable));
  //clamping the colors between 0 and 255
  red = Math.min(Math.max(red, 0), maxColor);
  green = Math.min(Math.max(green, 0), maxColor);
  
  const image = new Jimp(width, height, (err, image) =>
  {
    const color = Jimp.rgbaToInt(red, green, 0, maxColor);
  
    for (let x = 0; x < width; x++)
    {
      for (let y = 0; y < height; y++)
      {
        image.setPixelColor(color, x, y);
      }
    }
  
    const savePath = path.resolve('../Images' + date, date + _id + '.png');
    image.write(savePath, (err) =>
    {
      if (err) throw err;
      console.log(`Image created successfully at ${savePath}!`);
    });
  });
}

After this, the server calls for the deployed smart contract to mint a new NFT for every company, with the new images passed along as metadata, which gets uploaded to IPFS and pinned using Pinata.

The Json files are then loaded into to our website and displayed on the overview and detail pages.