Decentraland Builder

You can create beautiful scenes for Decentraland even if you don't own a parcel.

How to run

The builder is a SPA or single page application built with create-react-app. It uses an .env file as configuration for a few things, you'll need to create that first.

After that, to run this app you have two options:

Development Server: run npm start from the root path
Production: run npm run build and host the resulting index.html file with your server of choice, for example python -m SimpleHTTPServer 5000

For more information, check the create-react-app repo.

Environment

This project depends on a few environment variables to work, as well as external services for some features. The front-end connects to these services via URLs set via environment variables.

Creating an environment file

You'll need Create an .env file on the root folder and fill it following the .env.example file found there.

You will need to specify NODE_PATH to be src/ and you can check the contract addresses for values like REACT_APP_MANA_TOKEN_CONTRACT_ADDRESS.

Here are the basic requirements to run the project:

# .env

NODE_PATH=src

REACT_APP_ASSETS_URL=https://builder-packs-prod.now.sh
REACT_APP_CONTENT_SERVER_URL=https://content.decentraland.org
REACT_APP_DAR_URL=https://schema-api-staging.now.sh/dar
REACT_APP_BUILDER_SERVER_URL=https://builder-api.decentraland.org/v1
REACT_APP_MARKETPLACE_URL=https://api.decentraland.org/v1

# Third party

REACT_APP_SEGMENT_API_KEY=
REACT_APP_INTERCOM_APP_ID=
REACT_APP_ROLLBAR_ACCESS_TOKEN=

# Contracts

REACT_APP_MANA_TOKEN_CONTRACT_ADDRESS=0x0f5d2fb29fb7d3cfee444a200298f468908cc942

Asset packs

Every asset you're able to place on your scene (from the builder sidebar) belongs to an asset pack. An asset pack is a JSON file which points to a collection of assets.

To populate the builder sidebar the front-end needs to fetch these asset packs from a remote server. This remote server is represented by the REACT_APP_ASSETS_URL environment variable. For example an asset pack might look like this:

{
  "id": "a6fa9602-3e47-4dff-9a84-e8e017add15b",
  "version": 1,
  "title": "MiniTown",
  "assets": [
    {
      "id": "127727a7e8d9d265cc55ce4dcbbad3caa582d792a8792d1ff07cc36ab2c3b045",
      "name": "Barbacue",
      "thumbnail": "https://content.decentraland.today/contents/QmRBuZoF2TiD8Egonw5Y6g7AfqgVKGihPwtE4pG5uxLtHX",
      "url": "Barbacue_01/Barbacue_01.glb",
      "tags": ["decoration", "sausage", "sausages", "hamburger", "hamburgers", "backyard", "eggplant", "charcoal", "fire"],
      "category": "decorations",
      "variations": [],
      "contents": {
        "Barbacue_01/Barbacue_01.glb": "QmR1QAy5PWKUGho2fzt7NBLNobGwUT3ghFz9DxXGoGLvQn",
        "Barbacue_01/file1.png": "QmYACL8SnbXEonXQeRHdWYbfm8vxvaFAWnsLHUaDG4ABp5",
        "Barbacue_01/thumbnail.png": "QmRBuZoF2TiD8Egonw5Y6g7AfqgVKGihPwtE4pG5uxLtHX"
      }
    }
    // more assets (...)
  ]
}

As you can see, the assets themselves are pointers to a location on the content server, which holds the actual textures needed to render them on a scene.

Multiple asset packs

The Builder is capable of using multiple asset packs at the same time. A JSON file is used for easy discovery of the supported ones to be loaded by the application. Each of the asset-pack entries points to the corresponding asset-pack definition file and supports and thumbnail for display in the asset drawer.

{
  "version": 1,
  "packs": [
    {
      "id": "e6fa9601-3e47-4dff-9a84-e8e017add15a",
      "name": "MiniTown",
      "url": "/e6fa9601-3e47-4dff-9a84-e8e017add15a.json",
      "thumbnail": "/d184ef93-07f6-4fa5-bbac-0c3b6e4c5899.png"
    },
    {
      "id": "d184ef93-07f6-4fa5-bbac-0c3b6e4c5899",
      "name": "Pirates",
      "url": "/d184ef93-07f6-4fa5-bbac-0c3b6e4c5899.json",
      "thumbnail": "/d184ef93-07f6-4fa5-bbac-0c3b6e4c5899.png"
    }
  ]
}

Content server